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BIOD322 (Module 2) Latest Exam Readiness Guide Q & S
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BIOD322 (Module 2) Latest Exam Readiness Guide Q & S BIOD322 (Module 2) Latest Exam Readiness Guide Q & S BIOD322 (Module 2) Latest Exam Readiness Guide Q & S
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BIOD322Module 2
LATEST EXAM READINESS
GUIDE
Q&S
©2024/2025
, 1. Which of the following ions is primarily responsible for
the depolarization phase of an action potential?
A) Chloride (Cl⁻)
B) Potassium (K⁺)
C) Sodium (Na⁺)
D) Calcium (Ca²⁺)
Correct Answer: C) Sodium (Na⁺)
Rationale: During the depolarization phase, voltage-gated
sodium channels open, allowing an influx of Na⁺ ions into
the neuron, which leads to depolarization.
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2. What is the role of myelin in neural transmission?
A) To slow down the transmission of electrical signals
B) To increase the surface area for synaptic connections
C) To insulate axons and speed up electrical transmission
D) To create synaptic vesicles
Correct Answer: C) To insulate axons and speed up
electrical transmission
Rationale: Myelin acts as an insulator around axons,
©2024/2025
, allowing for faster transmission of electrical signals through
saltatory conduction.
---
3. Which type of synapse involves the direct passage of
ions from one neuron to another?
A) Chemical synapse
B) Electrical synapse
C) Axodendritic synapse
D) Axosomatic synapse
Correct Answer: B) Electrical synapse
Rationale: Electrical synapses allow direct passage of ions
through gap junctions between neurons, enabling rapid
signal transmission.
---
4. What is the primary neurotransmitter involved in the
sympathetic nervous system?
A) Dopamine
B) Serotonin
C) Acetylcholine
D) Norepinephrine
©2024/2025
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