BIOS 242 Week 5 Quiz Exam 3 (Latest
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. Which part of neuron integrates incoming signals?
A. Dendrite
B. Axon
C. Cell body
D. Synapse
Correct Answer: C
Rationale:The cell body (soma) processes incoming signals before
generating an output.
2. Which ion is responsible for depolarization?
A. Sodium
B. Potassium
C. Calcium
D. Chloride
Correct Answer: A
,Rationale:Sodium influx makes the inside of the neuron more
positive.
3. Which ion is responsible for repolarization?
A. Potassium
B. Sodium
C. Calcium
D. Magnesium
Correct Answer: A
Rationale:Potassium efflux restores the negative resting potential.
4. Which division of nervous system controls voluntary muscles?
A. Somatic
B. Autonomic
C. Sympathetic
D. Parasympathetic
Correct Answer: A
Rationale:Somatic system controls skeletal muscles consciously.
5. Which division controls involuntary organs?
A. Autonomic
B. Somatic
C. Central
D. Peripheral
Correct Answer: A
,Rationale:Autonomic system regulates heart, lungs, and glands
automatically.
6. Which division triggers “fight or flight”?
A. Sympathetic
B. Parasympathetic
C. Somatic
D. Central
Correct Answer: A
Rationale:Increases heart rate, dilates pupils, mobilizes energy.
7. Which division promotes “rest and digest”?
A. Parasympathetic
B. Sympathetic
C. Somatic
D. Central
Correct Answer: A
Rationale:Slows heart rate, stimulates digestion, conserves energy.
8. Which neurotransmitter is excitatory in CNS?
A. Glutamate
B. GABA
C. Dopamine
D. Serotonin
, Correct Answer: A
Rationale:Main excitatory neurotransmitter.
9. Which neurotransmitter is inhibitory in CNS?
A. GABA
B. Glutamate
C. Acetylcholine
D. Dopamine
Correct Answer: A
Rationale:Reduces neuron firing to prevent over-excitation.
10. Which neurotransmitter is linked to reward and pleasure?
A. Dopamine
B. Serotonin
C. Acetylcholine
D. GABA
Correct Answer: A
Rationale:Central to motivation and reward pathways.
11. Which neurotransmitter regulates mood and sleep?
A. Serotonin
B. Dopamine
C. Glutamate
D. Acetylcholine
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. Which part of neuron integrates incoming signals?
A. Dendrite
B. Axon
C. Cell body
D. Synapse
Correct Answer: C
Rationale:The cell body (soma) processes incoming signals before
generating an output.
2. Which ion is responsible for depolarization?
A. Sodium
B. Potassium
C. Calcium
D. Chloride
Correct Answer: A
,Rationale:Sodium influx makes the inside of the neuron more
positive.
3. Which ion is responsible for repolarization?
A. Potassium
B. Sodium
C. Calcium
D. Magnesium
Correct Answer: A
Rationale:Potassium efflux restores the negative resting potential.
4. Which division of nervous system controls voluntary muscles?
A. Somatic
B. Autonomic
C. Sympathetic
D. Parasympathetic
Correct Answer: A
Rationale:Somatic system controls skeletal muscles consciously.
5. Which division controls involuntary organs?
A. Autonomic
B. Somatic
C. Central
D. Peripheral
Correct Answer: A
,Rationale:Autonomic system regulates heart, lungs, and glands
automatically.
6. Which division triggers “fight or flight”?
A. Sympathetic
B. Parasympathetic
C. Somatic
D. Central
Correct Answer: A
Rationale:Increases heart rate, dilates pupils, mobilizes energy.
7. Which division promotes “rest and digest”?
A. Parasympathetic
B. Sympathetic
C. Somatic
D. Central
Correct Answer: A
Rationale:Slows heart rate, stimulates digestion, conserves energy.
8. Which neurotransmitter is excitatory in CNS?
A. Glutamate
B. GABA
C. Dopamine
D. Serotonin
, Correct Answer: A
Rationale:Main excitatory neurotransmitter.
9. Which neurotransmitter is inhibitory in CNS?
A. GABA
B. Glutamate
C. Acetylcholine
D. Dopamine
Correct Answer: A
Rationale:Reduces neuron firing to prevent over-excitation.
10. Which neurotransmitter is linked to reward and pleasure?
A. Dopamine
B. Serotonin
C. Acetylcholine
D. GABA
Correct Answer: A
Rationale:Central to motivation and reward pathways.
11. Which neurotransmitter regulates mood and sleep?
A. Serotonin
B. Dopamine
C. Glutamate
D. Acetylcholine
