2026-2027 BIOS 252 FINAL EXAM
NEWEST QUESTIONS AND DETAILED
CORRECT ANSWERS | A+ GRADE
VERIFIED ANSWERS
What are the three divisions of the ear? Correct Answer
External ear (auricle, external auditory meatus, tympanic
membrane), Middle ear (incus, malleus, stapes,
eustachian tube), Inner ear (cochlea, vestibule,
semicircular canals)
What is the flow of information in hearing? Correct Answer
External ear to middle ear to inner ear, transcribed into
electrical impulse by cochlea which contains hearing
receptors in the organ of Corti in the scala media, carried
by cranial nerve VIII to temporal lobe for interpretation
Which structure is responsible for linear balance? Correct
Answer Vestibule
Which structure is responsible for dynamic balance?
Correct Answer Semicircular canals
Describe the sliding contraction theory Correct Answer
Acetylcholine NT is released from synaptic end bulbs of
neuron, crossing over synaptic cleft, binds to ligand gated
receptor present on muscle tissue sarcolemma,
generating a muscle end action potential traveling down
the T-Tubule. This activates the sarcoplasmic reticulum to
,release calcium. From there, Ca binds to Troponin,
moving Tropomyosin, allowing Myosin to bind to Actin with
the help of ATP.
Where does ATP come from in the muscle? Correct
Answer Creatine Phosphate, Anaerobic Glycolysis,
Cellular Respiration
What are the structures of the eye? Correct Answer
Cornea, Sclera, Lens, Iris, Macula Lutea, Optic Disc,
Retina
What are the photoreceptors of the eye? Correct Answer
Rods (see black and white) and Cones (see color), only
present in retinal layer
What is the flow of information in the eye? Correct Answer
Cornea, lens, optic nerve (CN II), optic chiasm, optic tract,
thalamus (lateral geniculate nucleus), optic radiations,
occipital cortex
What structure refracts light? Correct Answer Lens,
causing the information to be concentrated on the Macula
Lutea.
What is the "blind spot"? Correct Answer Optic disc
What functions are associated with the various lobes of
the brain? Correct Answer Occipital: vision, Temporal:
hearing, Parietal: sensation/feeling, Frontal: motor
skills/personality
, What is the precentral gyrus? Correct Answer Primary
motor cortex
What is the postcentral gyrus? Correct Answer Primary
sensory cortex
What is Broca's area? Correct Answer Located in frontal
lobe of the dominant hemisphere of your brain, used for
producing speech. This develops BEFORE Wernicke's
area, which is why infants can babble but don't make
sense.
What is Wernicke's area? Correct Answer Found in
temporal lobe, used for making sense of speech and
comprehension (both of your own speech and of the
speech of others)
What parts of the gray matter tissue of the spinal cord are
responsible for which functions? Correct Answer Anterior
horn: somatic motor neurons, Posterior horn: all sensory
information, Lateral horn: autonomic system both
sympathetic (T1-L2/L3) and parasympathetic (brain stem,
S2-S4)
What are the cranial nerves and their functions? Correct
Answer CNI: Sensory, Smell
CN II: Sensory, Sight
CN III: Motor, Moving eyes
CN IV: Motor, Moving eyes
CN V: Both, Facial feeling and chewing
NEWEST QUESTIONS AND DETAILED
CORRECT ANSWERS | A+ GRADE
VERIFIED ANSWERS
What are the three divisions of the ear? Correct Answer
External ear (auricle, external auditory meatus, tympanic
membrane), Middle ear (incus, malleus, stapes,
eustachian tube), Inner ear (cochlea, vestibule,
semicircular canals)
What is the flow of information in hearing? Correct Answer
External ear to middle ear to inner ear, transcribed into
electrical impulse by cochlea which contains hearing
receptors in the organ of Corti in the scala media, carried
by cranial nerve VIII to temporal lobe for interpretation
Which structure is responsible for linear balance? Correct
Answer Vestibule
Which structure is responsible for dynamic balance?
Correct Answer Semicircular canals
Describe the sliding contraction theory Correct Answer
Acetylcholine NT is released from synaptic end bulbs of
neuron, crossing over synaptic cleft, binds to ligand gated
receptor present on muscle tissue sarcolemma,
generating a muscle end action potential traveling down
the T-Tubule. This activates the sarcoplasmic reticulum to
,release calcium. From there, Ca binds to Troponin,
moving Tropomyosin, allowing Myosin to bind to Actin with
the help of ATP.
Where does ATP come from in the muscle? Correct
Answer Creatine Phosphate, Anaerobic Glycolysis,
Cellular Respiration
What are the structures of the eye? Correct Answer
Cornea, Sclera, Lens, Iris, Macula Lutea, Optic Disc,
Retina
What are the photoreceptors of the eye? Correct Answer
Rods (see black and white) and Cones (see color), only
present in retinal layer
What is the flow of information in the eye? Correct Answer
Cornea, lens, optic nerve (CN II), optic chiasm, optic tract,
thalamus (lateral geniculate nucleus), optic radiations,
occipital cortex
What structure refracts light? Correct Answer Lens,
causing the information to be concentrated on the Macula
Lutea.
What is the "blind spot"? Correct Answer Optic disc
What functions are associated with the various lobes of
the brain? Correct Answer Occipital: vision, Temporal:
hearing, Parietal: sensation/feeling, Frontal: motor
skills/personality
, What is the precentral gyrus? Correct Answer Primary
motor cortex
What is the postcentral gyrus? Correct Answer Primary
sensory cortex
What is Broca's area? Correct Answer Located in frontal
lobe of the dominant hemisphere of your brain, used for
producing speech. This develops BEFORE Wernicke's
area, which is why infants can babble but don't make
sense.
What is Wernicke's area? Correct Answer Found in
temporal lobe, used for making sense of speech and
comprehension (both of your own speech and of the
speech of others)
What parts of the gray matter tissue of the spinal cord are
responsible for which functions? Correct Answer Anterior
horn: somatic motor neurons, Posterior horn: all sensory
information, Lateral horn: autonomic system both
sympathetic (T1-L2/L3) and parasympathetic (brain stem,
S2-S4)
What are the cranial nerves and their functions? Correct
Answer CNI: Sensory, Smell
CN II: Sensory, Sight
CN III: Motor, Moving eyes
CN IV: Motor, Moving eyes
CN V: Both, Facial feeling and chewing
