BIOD 152 FINAL EXAM QUESTIONS AND
ANSWERS GRADED A+ 2025/2026
The neuron pictured below is best described as - ANS multipolar
the neuron pictured below is best described as - ANS bipolar
name and describe what is occurring in the neuron cell membrane in section 4 of the diagram -
ANS afterpolarization
potassium gates are slow to close so there is an undershoot of potential
charge drops below -70mV and then returns to -70mV once at resting state again
name and describe what is occurring in the neuron cell membrane in section 2 of the diagram -
ANS depolarization
sodium gates open and sodium rushes into axon
voltage goes past 0 and up to 40 mV
where is the integration center of a reflex located - ANS CNS
what is true about the flexor withdrawal reflex
a. it does not involved interneurons
b. it involves excitatory interneurons
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, c. it involves inhibitory interneurons
d. the effect of the reflex is to create a co-contraction of two muscles
e. a and d
f. b and c - ANS f
what is false about the flexor withdrawal reflex
a. it does not involve interneurons
b. it involved excitatory interneurons
c. it involves inhibitory interneurons
d. the effect of the reflex is to create a co-contraction of two muscles
e. a and d
f. b and c - ANS e
label the nerves in the figure - ANS a. lateral femoral cutaneous
b. femoral nerve
c. saphenous
which of the following is most likely a symptom of ALS
a. impaired ability to swallow
b. decreased sensation in the hands
c. shrinkage of cerebral cortex
d. increased size of brain ventricles
e. all of the above - ANS a
what is the purpose of the blood brain barrier? describe its maintenance from a cellular level -
ANS a diffusion barrier which prevents particles from entering CNS tissue
keeps the brain and spinal cord separate from regular blood circulation
formed by blood capillaries due to glial cells astrocytes
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
ANSWERS GRADED A+ 2025/2026
The neuron pictured below is best described as - ANS multipolar
the neuron pictured below is best described as - ANS bipolar
name and describe what is occurring in the neuron cell membrane in section 4 of the diagram -
ANS afterpolarization
potassium gates are slow to close so there is an undershoot of potential
charge drops below -70mV and then returns to -70mV once at resting state again
name and describe what is occurring in the neuron cell membrane in section 2 of the diagram -
ANS depolarization
sodium gates open and sodium rushes into axon
voltage goes past 0 and up to 40 mV
where is the integration center of a reflex located - ANS CNS
what is true about the flexor withdrawal reflex
a. it does not involved interneurons
b. it involves excitatory interneurons
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, c. it involves inhibitory interneurons
d. the effect of the reflex is to create a co-contraction of two muscles
e. a and d
f. b and c - ANS f
what is false about the flexor withdrawal reflex
a. it does not involve interneurons
b. it involved excitatory interneurons
c. it involves inhibitory interneurons
d. the effect of the reflex is to create a co-contraction of two muscles
e. a and d
f. b and c - ANS e
label the nerves in the figure - ANS a. lateral femoral cutaneous
b. femoral nerve
c. saphenous
which of the following is most likely a symptom of ALS
a. impaired ability to swallow
b. decreased sensation in the hands
c. shrinkage of cerebral cortex
d. increased size of brain ventricles
e. all of the above - ANS a
what is the purpose of the blood brain barrier? describe its maintenance from a cellular level -
ANS a diffusion barrier which prevents particles from entering CNS tissue
keeps the brain and spinal cord separate from regular blood circulation
formed by blood capillaries due to glial cells astrocytes
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
