Describe the general functions of the parietal lobe
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- Somatosensory cortex: post-central gyrus, cutaneous and muscular
sensing
- Understanding speech and formulating words to express thoughts and
emotions
-Interpretation of textures and shapes
Describe the three specific states of a voltage-gated Na+ channel
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, Have two gates (inactivation gate and activation gate)
Resting (closed): inactivation gate is open, activation gate is closed (-70mv)
Activation (open): Inactivation gate and activation gate open (-55mv)
Inactivation (closed): Inactivation gate closed, activation gate open (+30mv)
Describe what happens in the initial segment during an action potential (All or none
law)
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- If threshold reached, action potential generated and propagated down
axon without any loss in intensity
- If threshold not reached, voltage-gated channels stay closed; no action
potential
- The axon shows the same intensity of response to values greater than
threshold
How does the amount of sleep we get change during the lifecycle?
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As age increases, sleep decreases
Describe the general function of parasympathetic and sympathetic divisions of the
ANS
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, 1. Parasympathetic division
- "rest and digest"
- Conserving energy, replenishing nutrients
- Craniosacral region (vagus nerve)
- Ganglia are close to or in effector organs
- Long preganglionic axon; sort postganglionic axon
- Preganglionic and postganglionic neurons release ACh
2. Sympathetic division
- "fight or flight"
- Thoracolumbar region
- Ganglia are close to CNS but pathway is complex
- Short, branching preganglionic axon; long postganglionic axon
- Preganglionic neurons release ACh, postganglionic neurons release
norepinephrine
Describe the general response of the sympathetic nervous system
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1. Pupil dilation
2. Stimulates adrenal medulla to secrete epinephrine and norepinephrine to
prolong sympathetic effects
3. Decreases activity of digestive system
4. Release of fuel molecules from liver and adipose connective tissue into
the blood
5. Increases heart rate, force of contraction, and causes bronchodilation
6. Increases secretion of sweat glands
7. Vasoconstricts blood vessels in skeletal muscle
Describe the events that occur when an action potential reaches the transmissive
segment
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Give this one a try later!
- Somatosensory cortex: post-central gyrus, cutaneous and muscular
sensing
- Understanding speech and formulating words to express thoughts and
emotions
-Interpretation of textures and shapes
Describe the three specific states of a voltage-gated Na+ channel
Give this one a try later!
, Have two gates (inactivation gate and activation gate)
Resting (closed): inactivation gate is open, activation gate is closed (-70mv)
Activation (open): Inactivation gate and activation gate open (-55mv)
Inactivation (closed): Inactivation gate closed, activation gate open (+30mv)
Describe what happens in the initial segment during an action potential (All or none
law)
Give this one a try later!
- If threshold reached, action potential generated and propagated down
axon without any loss in intensity
- If threshold not reached, voltage-gated channels stay closed; no action
potential
- The axon shows the same intensity of response to values greater than
threshold
How does the amount of sleep we get change during the lifecycle?
Give this one a try later!
As age increases, sleep decreases
Describe the general function of parasympathetic and sympathetic divisions of the
ANS
Give this one a try later!
, 1. Parasympathetic division
- "rest and digest"
- Conserving energy, replenishing nutrients
- Craniosacral region (vagus nerve)
- Ganglia are close to or in effector organs
- Long preganglionic axon; sort postganglionic axon
- Preganglionic and postganglionic neurons release ACh
2. Sympathetic division
- "fight or flight"
- Thoracolumbar region
- Ganglia are close to CNS but pathway is complex
- Short, branching preganglionic axon; long postganglionic axon
- Preganglionic neurons release ACh, postganglionic neurons release
norepinephrine
Describe the general response of the sympathetic nervous system
Give this one a try later!
1. Pupil dilation
2. Stimulates adrenal medulla to secrete epinephrine and norepinephrine to
prolong sympathetic effects
3. Decreases activity of digestive system
4. Release of fuel molecules from liver and adipose connective tissue into
the blood
5. Increases heart rate, force of contraction, and causes bronchodilation
6. Increases secretion of sweat glands
7. Vasoconstricts blood vessels in skeletal muscle
Describe the events that occur when an action potential reaches the transmissive
segment
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