Anatomy and physiology
cheat sheet 1
Anatomy and Physiology
(Ridge Point H S)
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, Fxns: sensory (external/internal stimuli), transmits info to brain/spine, integration (processes info in brain/spine), motor (sends info to muscles/glands/organs), maintain
homeostasis. Neuron: transmits impulses; dendrite receives stimulus + carries toward cell body-has nucleus- then to axon: fiber, carries impulses away from cell body; schwann
cell: produce myelin in PNS; myelin sheath: lipid layer, insulates axon; node of ranvier: gaps in myelin sheath. Sensory (bring messages to CNS, afferent pathway), motor (send
from CNS, efferent pathway), interneurons (1+ synapses btwn sensory/motor neurons in CNS). Impulses: stimulus, excitability (ability of neuron to respond and create impulse),
all of nothing rule: stimulus strong enough to start impulse or nothing happens; self-propagation: once impulse starts it flows only in its 1 direction. Synapse: gap btwn axon of 1
neuron and dendrite of other, uses neurotransmitters to start impulse or an effector (muscle or gland), ensures one-way transmission. Neurotransmitters: chemicals in jct
allowing impulses to start. CNS: brain (brain stem; diencephalon- thalamus, hypothalamus; cerebellum, cerebrum), spine (spinal cord). Meninges: 3 coverings around
brain/spine, protect + nourish them; dura mater: tough outer layer; arachnoid mater: adheres to dura mater and has weblike attachments to pia mater: thin, clear, tough;
cerebrospinal fluid: buffers, nourishes, detoxifies brain/spine, flows in subarachnoid space btwn arach. mater/pia mater. Brain: Cerebellum (coordination of movement, motor
learning, attention, language), Cerebrum (conscious activity- perception, emotion, thought, judgment, planning; has lobes, cer. cortex, med body, basal ganglia) cortex: (gray
matter (cell bodies + synapses, no myelin), folded bulges, gyri, create deep furrows called sulci. Folds increase gray matter + processable info.) Thalamus (filters then relays
sensory info except smell to brain regions, cortex 4 interp. Descending fibers into cerebral cortex, awareness of pain/touch/temp), Medulla (vital reflexes- heart beat, respiration;
white matter, myelinated axons), basal ganglia: gray matter masses, voluntary movement Limbic System: strxrs (amygdala, hippocampus [short-term into long-term memory],
septum, basal ganglia, etc), regulate expression of emotions, emotional memory, assoc. feelings w/ sensations. Brainstem (medulla oblongata, pons, and midbrain send info btwn
cerebrum + body, att to spinal cord [involuntary responses eg digestion, heart, BP, sleep patterns, hunger/thirst], relays info from spine to upper brain; Hypothalamus (regulating
internal organs, monitoring info from the ANS, regulate sleep/appetite, body temp with thermo- and osmoreceptors causing sweating or shivers, blood flow, pituitary) brain
waves- electric potential btwn regions, seen on electroencephalogram w/ electrodes, active-sleep: beta/alpha/theta/delta. PNS: 12 pair cranial nerves (undersurface of brain, this
+ corticospinal tract + posterior column-medial meniscus pathway + spinothalamic tract: sent motor/sensory feeling to face/neck), 31 spinal nerves. SNS (somatic-voluntary),
ANS (autonomic-involuntary; sympathetic- emergency, fight/flight & parasympathetic- normal) diencephalon- cerebellum, (hypo)thalamus. Commissural fibers: conduct
impulses btwn hemis, form corpus callosum Projection fibers: conduct impulse in/out of cerebral hemis Association fibers: conduct impulses w/in hemis. Neuroglia: non-
neuronal cells that maintain homeostasis, form myelin, provide support and protection for neutrons in central and peripheral nervous systems. Glial cells (oligodendrocytes,
astrocytes, ependymal cells and microglia), peripheral glial cells (schwann cells and satellite cells) Glial cells: support/supply o2/insulate neurons, destroy pathogens and remove
dead neurons. Frontal lobe: conscious thought/personality/ planning/morality/comparecontrast, anterior to central sulcus. Posterior portion has precentral gyrus (somatomotor or
primary motor cortex) -- voluntary motions processed. Motor homunculus represents portions of body which motor cortex controls; Maturity: 20 yrs; Broca’s area (speech
prdxn) Parietal lobe: spatial processing, navigation abilities, sensory, language. (Posterior to central sulcus and frontal lobe) In anterior portion--somatosensory or primary
sensory cortex (genitalia, breasts). Occipital lobe: processes visual images (posterior and inferior to parieto-occipital sulcus) Temporal lobe: visual memory, object recognition,
sound/smell processing, language processing (inferior to lateral sulcus or sylvian fissure); wernicke’s area (language comprehension, meaningful speech) epilepsy: recurrent
seizures, abnormal electrical activity when neurons send wrong messages, caused by illness, stroke, damage, unknown. alzheimer’s disease connections btwn networks of
neurons break down bc increased plasma osmolality, shrinking brain regions until atrophy, multiple sclerosis: autoimmune; inflammatory lesions→neuronal demyelination,
axonal damage, neurological dysfunctions bc of plaques in gray/white matter, impaired movement and senses; parkinson’s disease: tremors/movement/speech impaired bc loss
of dopamine bc breakdown of neurons, cerebral palsy: movement/balance/posture, exag. reflexes bc abronal brain development b4 birth, shingles/herpes zoster: reactivation of
varicella-zoster virus, in cranial nerve, rash/inflamm., stroke ischemic-insuffic. O2 to brain, hemorrhagic- leaky blood vessels, depletes ATP so Na/Ca gradient disrupted. ALS:
amyotrophic lateral sclerosis, mutation causes motor neurons to get damaged, movement/cognitive impairment. / Receptors: mechano- (pressure/stretch; movement/balance)
thermo- (skin/viscera; internal/external response) pain (stim. by lack of o2, chems released from damaged cells) chemo- (detect o2/co2/ph changes) photo- (light-stim.ed);
special senses (vision, hearing, equilibrium, taste, smell) mediated by sense organs innervated by cranial nerves. General receps: skin, muscle, joints, tendons, pain (somatic or
visceral), somesthetic: area of cerebral cortex receives sensory info from somatic senses + proprioceptive senses + visceral); touch organs, proprioception, temp, BP. Eye: light
into neural activity, neural activity processed; objects reflecting light, IDed by size, shape, color, memory; movement detected in most light. Light focused to retina w/
cornea/lens→retina converts light (upside-down/backwards)→retinal axons (carry nerve impulses away from cell body) form optic nerve→visual info distributed to diff brain
parts. Outer layer-sclera/cornea; middle-choroid/ciliary body/iris; inner-retina; extraocular muscles (attach eye to scull; movement). Sclera: protective connective tissue,
maintain shape, provide attached for muscles. Conjunctiva: membrane w/in eyelid, att to sclera; cornea: clear, dome-y part of sclera, covers iris/pupil; anterior chamber: btwn
cornea+pupil; aqueous humor:fluid fills anterior chamber, maintains shape, nutrients for lens/cornea, waste management; choroid layer: middle layer w/ blood vessels; ciliary
body: circular muscle band behind iris, produces aq humor, changes shape of lens to focus; iris: circular muscle controls pupil diameter, pigmented portion of choroid layer w/
blood vessels; lens: crystalline strxr behind iris, focuses light onto retina; pupil: allows light to reach retina; vitreous: thick/clear fluid/h2o, fills eye center, gives shape; retina:
sensory tissue @ back, photoreceptors (rods for black/white, wavelengths but not color/clarity; cones=color, red/green/blue [daytime view]) convert light rays→electrical
impulses relayed to brain via optic nerve, which merge @optic chiasm, where R+L eye info crosses over. Ophthalmoscopic appearance: optic disk is blind spot where blood
vessels originate (shadow retina), optic neve fibers exit eye (no photorcptrs), macula: retina 4 central vision, fovea: retina center w/ cones.Myopia: nearsightedness bc eye shape
too long so light from cornea funnels too soon, hits retina wrong; hyperopia farsighted, shape too short, light from cornea hits retina too soon. Presbyopia: slow loss of sight bc
weakening ciliary muscles and lens flexibility (old age). Nyctalopia: can’t see dim/dark light bc retinitis pigmentosa- rod cells can’t respond to light. Astigmatism: irregular
shaped curvature of eye, light bends wrong, blurry vision. conjunctivitis/pink eye: conjunctiva inflamed. Color blind: inherited, faulty photopigments (mcs detect color in cones)
Ear eardrum: vibrates to amplify sound, separates inner/middle; middle- ossicles (anvil/stirrup/stapes) amplify sound; eustachian tube: connects middle ear to throat, equalizes
eardrum pressure. Cochea: receptors for sound, sends signals to brain via auditory nerve. Process: sound waves enter outer, flow thru canal to eardrum, it vibrates, passes
vibrations into hammar, it makes anvil vibrate, it makes stirrup vibrate, sends to inner ear through liquid sac, passes to cochlea and vestibular system (3 canals responsible for
sense of balance and spatial orientation, has otoliths w/ calc. Carbonate, movement of otoliths over small hairs inside pathway send signals to brain to separate sound), crista
ampullaris: rcptr region, tuft of hairy cells w/ cupula (gelatinous cap). otis media (ear infec):eustachian tube dysfunction or middle ear inflamed. Hearing loss: conductive (sound
doesn’t reach outer/middle ear) sensorineural (inner ear nerve pathways damaged, can cause SNHL) mixed (conductive w/ or bc of the 2nd). Taste 10,000 buds perceive:
sour/sweet/bitter/salty/ umami (salts of some acids); hair on rcptr catches chemicals on food, sends nerve impulses, taste/smell intertwined; dysgeusia all food sour, sweet, bitter,
or metallic; causes: infection, medications, vitamin deficiencies. Smell Anosmia: loss of smell, inherited (olfactory system develops wrong) or disease. Dysosmia: peripheral
neurological causes (altered firing of rcprs in regen) or central lesions skin: meissner’s corpuscles: in capsule of cnnctv tissue, light touch, palms/soles/lips/eyelids; merkel discs:
btwn epi- and dermis; root hair plexus: base of hair follicle; pacinian corpuscles: deep pressure/vibration (layrs of schwann cells w/in cnnctv tissue), on-off pressure; ruffini’s
endings/krause’s end bulbs: pressure sensors, dermis mainly, continuous pressure; nociceptors: visceral (maintain homeostasis) somatic (skin/skeletal muscle, lack of O2,
inflammation); proprioceptors: stretch rcptrs, in joins/ligaments/tendons, continuous contraction; muscle spindles: muscle fibers w/ sensory nerve, detect stretch, stimulate
reflex. / Exocrine glands discharge secretions via duct to targeted tissue (sebaceous, salivary glands). Endocrine glands release hormones into bloodstream w/o ducts; epithelial
tissue. Hormones: signaling mcs, chemical messengers; most follow (-) feedback loop or closed loop system, (+) feedback includes lactation & labor contractions, eg:
hypothalamus prdces oxytocin, transported to posterior pituitary & released, stimulates uterine contraction, loop stops when baby exists birth canal. Hypothalamus: [ADH,
oxytocin, regulatory hormones], attached to posterior pituitary; controls pituitary secretions thru nervous stimulation (posterior pituitary) and releasing hormones secreted to
anterior pituitary, neurosecretory cells: neurons, synthesize/secrete hormones. Pituitary controls other glands, located in sella turcica of sphenoid bone, body/tissue growth,
endorphins- reduce sensitivity to pain. Anterior/adenohypophysis FSH- follicle stim. Horm & LH- luteinizing horm → regulate estrogen & progesterone, go to ovary/testes; TSH
(tells thyroid to release thyroxine), ACTH- adreno-corticotropic horm. stims adrenal cortex secretions, GH, MSH- melanocyte-stim. horm. (melanin prdxn), prolactin (milk).
Posterior/neurohypophysis oxytocin (contractions in childbirth; milk release from breast tissue), ADH- antidiuretic horm. (→kidneys to reabsorb more h20). Diabetes
insipidus=hyposecretion ADH=excess dilute urine excreted. Pineal: in brain; melatonin (regulates sleep-wake cycle). Thyroid wraps around trachea; thyroxine (T4) (regulates
metabolism[/mood/ body temp]- stimulates cell resp w/ conc in blood; iodine needed 4 prdxn) triiodothyronine (T4) (digestive/metabolic fxn, bone health) CT -calcitonin.
cretinism: hypoth. in infancy- deformity/learning disabilities [myxedema is in adult]; Graves’: autoimmune, antibodies sent to TSH receptor→hyperthyr. Hashimoto’s
thyroiditis: lymphocytes invade tissue, hypo goiter:mostly lack of iodine, graves/autoimmune cause; can be hereditary, risks: female, 40+ age.Parathyroid: 4 on back of thy.
PTH- parathy horm. regulates Ca in blood/its absorb. by bones. (Hypoparathyr-muscle tetany; hyperparathy-osteitis fibrosa cystica=bone demi- neralization)Adrenal suprarenal
medulla: E-epinephrine, NE-norepinephrine[cont. release] (regulate fight/flight response/stress) suprarenal cortex: aldosterone (regulate reabsorp of nutrients from kidney),
cortisol (metabolism rate of carbs, fats, proteins) corticosterone (stress- external), androgens (male sexual/ reproductive fxn); tumors cuase hypersec. of medullary hormones
[prolonged fight/flight]; cushings’=cortisol hyper; addison’s= aldosterone/ glucocorticoids hyposec.Pancreas behind stomach; insulin (causes liver/muscles to remove sugar from
blood + store as fat), glucagon (liver break down fat stores/release sugar into blood) diabetes mellitus: I=insuline-dep (abs. deficiency), II= -indep. (down-reg of insulin
receptors); hyperinsulinemia→ hypoglycemia Ovaries estrogen/ progesterone[endometrium secretes when egg binds to it, stop cycle] (regulate menstrual cycle), inhibin- stop
messages.downloaded_by
cheat sheet 1
Anatomy and Physiology
(Ridge Point H S)
messages.studocu_not_sponsored_or_endorsed_by_college
messages.downloaded_by
, Fxns: sensory (external/internal stimuli), transmits info to brain/spine, integration (processes info in brain/spine), motor (sends info to muscles/glands/organs), maintain
homeostasis. Neuron: transmits impulses; dendrite receives stimulus + carries toward cell body-has nucleus- then to axon: fiber, carries impulses away from cell body; schwann
cell: produce myelin in PNS; myelin sheath: lipid layer, insulates axon; node of ranvier: gaps in myelin sheath. Sensory (bring messages to CNS, afferent pathway), motor (send
from CNS, efferent pathway), interneurons (1+ synapses btwn sensory/motor neurons in CNS). Impulses: stimulus, excitability (ability of neuron to respond and create impulse),
all of nothing rule: stimulus strong enough to start impulse or nothing happens; self-propagation: once impulse starts it flows only in its 1 direction. Synapse: gap btwn axon of 1
neuron and dendrite of other, uses neurotransmitters to start impulse or an effector (muscle or gland), ensures one-way transmission. Neurotransmitters: chemicals in jct
allowing impulses to start. CNS: brain (brain stem; diencephalon- thalamus, hypothalamus; cerebellum, cerebrum), spine (spinal cord). Meninges: 3 coverings around
brain/spine, protect + nourish them; dura mater: tough outer layer; arachnoid mater: adheres to dura mater and has weblike attachments to pia mater: thin, clear, tough;
cerebrospinal fluid: buffers, nourishes, detoxifies brain/spine, flows in subarachnoid space btwn arach. mater/pia mater. Brain: Cerebellum (coordination of movement, motor
learning, attention, language), Cerebrum (conscious activity- perception, emotion, thought, judgment, planning; has lobes, cer. cortex, med body, basal ganglia) cortex: (gray
matter (cell bodies + synapses, no myelin), folded bulges, gyri, create deep furrows called sulci. Folds increase gray matter + processable info.) Thalamus (filters then relays
sensory info except smell to brain regions, cortex 4 interp. Descending fibers into cerebral cortex, awareness of pain/touch/temp), Medulla (vital reflexes- heart beat, respiration;
white matter, myelinated axons), basal ganglia: gray matter masses, voluntary movement Limbic System: strxrs (amygdala, hippocampus [short-term into long-term memory],
septum, basal ganglia, etc), regulate expression of emotions, emotional memory, assoc. feelings w/ sensations. Brainstem (medulla oblongata, pons, and midbrain send info btwn
cerebrum + body, att to spinal cord [involuntary responses eg digestion, heart, BP, sleep patterns, hunger/thirst], relays info from spine to upper brain; Hypothalamus (regulating
internal organs, monitoring info from the ANS, regulate sleep/appetite, body temp with thermo- and osmoreceptors causing sweating or shivers, blood flow, pituitary) brain
waves- electric potential btwn regions, seen on electroencephalogram w/ electrodes, active-sleep: beta/alpha/theta/delta. PNS: 12 pair cranial nerves (undersurface of brain, this
+ corticospinal tract + posterior column-medial meniscus pathway + spinothalamic tract: sent motor/sensory feeling to face/neck), 31 spinal nerves. SNS (somatic-voluntary),
ANS (autonomic-involuntary; sympathetic- emergency, fight/flight & parasympathetic- normal) diencephalon- cerebellum, (hypo)thalamus. Commissural fibers: conduct
impulses btwn hemis, form corpus callosum Projection fibers: conduct impulse in/out of cerebral hemis Association fibers: conduct impulses w/in hemis. Neuroglia: non-
neuronal cells that maintain homeostasis, form myelin, provide support and protection for neutrons in central and peripheral nervous systems. Glial cells (oligodendrocytes,
astrocytes, ependymal cells and microglia), peripheral glial cells (schwann cells and satellite cells) Glial cells: support/supply o2/insulate neurons, destroy pathogens and remove
dead neurons. Frontal lobe: conscious thought/personality/ planning/morality/comparecontrast, anterior to central sulcus. Posterior portion has precentral gyrus (somatomotor or
primary motor cortex) -- voluntary motions processed. Motor homunculus represents portions of body which motor cortex controls; Maturity: 20 yrs; Broca’s area (speech
prdxn) Parietal lobe: spatial processing, navigation abilities, sensory, language. (Posterior to central sulcus and frontal lobe) In anterior portion--somatosensory or primary
sensory cortex (genitalia, breasts). Occipital lobe: processes visual images (posterior and inferior to parieto-occipital sulcus) Temporal lobe: visual memory, object recognition,
sound/smell processing, language processing (inferior to lateral sulcus or sylvian fissure); wernicke’s area (language comprehension, meaningful speech) epilepsy: recurrent
seizures, abnormal electrical activity when neurons send wrong messages, caused by illness, stroke, damage, unknown. alzheimer’s disease connections btwn networks of
neurons break down bc increased plasma osmolality, shrinking brain regions until atrophy, multiple sclerosis: autoimmune; inflammatory lesions→neuronal demyelination,
axonal damage, neurological dysfunctions bc of plaques in gray/white matter, impaired movement and senses; parkinson’s disease: tremors/movement/speech impaired bc loss
of dopamine bc breakdown of neurons, cerebral palsy: movement/balance/posture, exag. reflexes bc abronal brain development b4 birth, shingles/herpes zoster: reactivation of
varicella-zoster virus, in cranial nerve, rash/inflamm., stroke ischemic-insuffic. O2 to brain, hemorrhagic- leaky blood vessels, depletes ATP so Na/Ca gradient disrupted. ALS:
amyotrophic lateral sclerosis, mutation causes motor neurons to get damaged, movement/cognitive impairment. / Receptors: mechano- (pressure/stretch; movement/balance)
thermo- (skin/viscera; internal/external response) pain (stim. by lack of o2, chems released from damaged cells) chemo- (detect o2/co2/ph changes) photo- (light-stim.ed);
special senses (vision, hearing, equilibrium, taste, smell) mediated by sense organs innervated by cranial nerves. General receps: skin, muscle, joints, tendons, pain (somatic or
visceral), somesthetic: area of cerebral cortex receives sensory info from somatic senses + proprioceptive senses + visceral); touch organs, proprioception, temp, BP. Eye: light
into neural activity, neural activity processed; objects reflecting light, IDed by size, shape, color, memory; movement detected in most light. Light focused to retina w/
cornea/lens→retina converts light (upside-down/backwards)→retinal axons (carry nerve impulses away from cell body) form optic nerve→visual info distributed to diff brain
parts. Outer layer-sclera/cornea; middle-choroid/ciliary body/iris; inner-retina; extraocular muscles (attach eye to scull; movement). Sclera: protective connective tissue,
maintain shape, provide attached for muscles. Conjunctiva: membrane w/in eyelid, att to sclera; cornea: clear, dome-y part of sclera, covers iris/pupil; anterior chamber: btwn
cornea+pupil; aqueous humor:fluid fills anterior chamber, maintains shape, nutrients for lens/cornea, waste management; choroid layer: middle layer w/ blood vessels; ciliary
body: circular muscle band behind iris, produces aq humor, changes shape of lens to focus; iris: circular muscle controls pupil diameter, pigmented portion of choroid layer w/
blood vessels; lens: crystalline strxr behind iris, focuses light onto retina; pupil: allows light to reach retina; vitreous: thick/clear fluid/h2o, fills eye center, gives shape; retina:
sensory tissue @ back, photoreceptors (rods for black/white, wavelengths but not color/clarity; cones=color, red/green/blue [daytime view]) convert light rays→electrical
impulses relayed to brain via optic nerve, which merge @optic chiasm, where R+L eye info crosses over. Ophthalmoscopic appearance: optic disk is blind spot where blood
vessels originate (shadow retina), optic neve fibers exit eye (no photorcptrs), macula: retina 4 central vision, fovea: retina center w/ cones.Myopia: nearsightedness bc eye shape
too long so light from cornea funnels too soon, hits retina wrong; hyperopia farsighted, shape too short, light from cornea hits retina too soon. Presbyopia: slow loss of sight bc
weakening ciliary muscles and lens flexibility (old age). Nyctalopia: can’t see dim/dark light bc retinitis pigmentosa- rod cells can’t respond to light. Astigmatism: irregular
shaped curvature of eye, light bends wrong, blurry vision. conjunctivitis/pink eye: conjunctiva inflamed. Color blind: inherited, faulty photopigments (mcs detect color in cones)
Ear eardrum: vibrates to amplify sound, separates inner/middle; middle- ossicles (anvil/stirrup/stapes) amplify sound; eustachian tube: connects middle ear to throat, equalizes
eardrum pressure. Cochea: receptors for sound, sends signals to brain via auditory nerve. Process: sound waves enter outer, flow thru canal to eardrum, it vibrates, passes
vibrations into hammar, it makes anvil vibrate, it makes stirrup vibrate, sends to inner ear through liquid sac, passes to cochlea and vestibular system (3 canals responsible for
sense of balance and spatial orientation, has otoliths w/ calc. Carbonate, movement of otoliths over small hairs inside pathway send signals to brain to separate sound), crista
ampullaris: rcptr region, tuft of hairy cells w/ cupula (gelatinous cap). otis media (ear infec):eustachian tube dysfunction or middle ear inflamed. Hearing loss: conductive (sound
doesn’t reach outer/middle ear) sensorineural (inner ear nerve pathways damaged, can cause SNHL) mixed (conductive w/ or bc of the 2nd). Taste 10,000 buds perceive:
sour/sweet/bitter/salty/ umami (salts of some acids); hair on rcptr catches chemicals on food, sends nerve impulses, taste/smell intertwined; dysgeusia all food sour, sweet, bitter,
or metallic; causes: infection, medications, vitamin deficiencies. Smell Anosmia: loss of smell, inherited (olfactory system develops wrong) or disease. Dysosmia: peripheral
neurological causes (altered firing of rcprs in regen) or central lesions skin: meissner’s corpuscles: in capsule of cnnctv tissue, light touch, palms/soles/lips/eyelids; merkel discs:
btwn epi- and dermis; root hair plexus: base of hair follicle; pacinian corpuscles: deep pressure/vibration (layrs of schwann cells w/in cnnctv tissue), on-off pressure; ruffini’s
endings/krause’s end bulbs: pressure sensors, dermis mainly, continuous pressure; nociceptors: visceral (maintain homeostasis) somatic (skin/skeletal muscle, lack of O2,
inflammation); proprioceptors: stretch rcptrs, in joins/ligaments/tendons, continuous contraction; muscle spindles: muscle fibers w/ sensory nerve, detect stretch, stimulate
reflex. / Exocrine glands discharge secretions via duct to targeted tissue (sebaceous, salivary glands). Endocrine glands release hormones into bloodstream w/o ducts; epithelial
tissue. Hormones: signaling mcs, chemical messengers; most follow (-) feedback loop or closed loop system, (+) feedback includes lactation & labor contractions, eg:
hypothalamus prdces oxytocin, transported to posterior pituitary & released, stimulates uterine contraction, loop stops when baby exists birth canal. Hypothalamus: [ADH,
oxytocin, regulatory hormones], attached to posterior pituitary; controls pituitary secretions thru nervous stimulation (posterior pituitary) and releasing hormones secreted to
anterior pituitary, neurosecretory cells: neurons, synthesize/secrete hormones. Pituitary controls other glands, located in sella turcica of sphenoid bone, body/tissue growth,
endorphins- reduce sensitivity to pain. Anterior/adenohypophysis FSH- follicle stim. Horm & LH- luteinizing horm → regulate estrogen & progesterone, go to ovary/testes; TSH
(tells thyroid to release thyroxine), ACTH- adreno-corticotropic horm. stims adrenal cortex secretions, GH, MSH- melanocyte-stim. horm. (melanin prdxn), prolactin (milk).
Posterior/neurohypophysis oxytocin (contractions in childbirth; milk release from breast tissue), ADH- antidiuretic horm. (→kidneys to reabsorb more h20). Diabetes
insipidus=hyposecretion ADH=excess dilute urine excreted. Pineal: in brain; melatonin (regulates sleep-wake cycle). Thyroid wraps around trachea; thyroxine (T4) (regulates
metabolism[/mood/ body temp]- stimulates cell resp w/ conc in blood; iodine needed 4 prdxn) triiodothyronine (T4) (digestive/metabolic fxn, bone health) CT -calcitonin.
cretinism: hypoth. in infancy- deformity/learning disabilities [myxedema is in adult]; Graves’: autoimmune, antibodies sent to TSH receptor→hyperthyr. Hashimoto’s
thyroiditis: lymphocytes invade tissue, hypo goiter:mostly lack of iodine, graves/autoimmune cause; can be hereditary, risks: female, 40+ age.Parathyroid: 4 on back of thy.
PTH- parathy horm. regulates Ca in blood/its absorb. by bones. (Hypoparathyr-muscle tetany; hyperparathy-osteitis fibrosa cystica=bone demi- neralization)Adrenal suprarenal
medulla: E-epinephrine, NE-norepinephrine[cont. release] (regulate fight/flight response/stress) suprarenal cortex: aldosterone (regulate reabsorp of nutrients from kidney),
cortisol (metabolism rate of carbs, fats, proteins) corticosterone (stress- external), androgens (male sexual/ reproductive fxn); tumors cuase hypersec. of medullary hormones
[prolonged fight/flight]; cushings’=cortisol hyper; addison’s= aldosterone/ glucocorticoids hyposec.Pancreas behind stomach; insulin (causes liver/muscles to remove sugar from
blood + store as fat), glucagon (liver break down fat stores/release sugar into blood) diabetes mellitus: I=insuline-dep (abs. deficiency), II= -indep. (down-reg of insulin
receptors); hyperinsulinemia→ hypoglycemia Ovaries estrogen/ progesterone[endometrium secretes when egg binds to it, stop cycle] (regulate menstrual cycle), inhibin- stop
messages.downloaded_by
