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1. Neurotransmitters are chemicals that transmit signals from one nerve cell to
another. Which of the following neurotransmitters is responsible for
inhibiting the transmission of nerve signals?
A. Acetylcholine
B. GABA
C. Glutamate
D. Dopamine
Answer: B. GABA
Rationale: GABA (gamma-aminobutyric acid) is an inhibitory neurotransmitter
that helps regulate nerve signaling by reducing the activity of other
neurotransmitters.
2. Which part of the brain is responsible for processing sensory information and
generating motor responses?
A. Cerebellum
B. Hypothalamus
C. Cerebrum
D. Brainstem
Answer: C. Cerebrum
Rationale: The cerebrum is the largest part of the brain and is responsible for
higher brain functions such as sensory processing, motor control, and
speech.
3. Sleep is regulated by the circadian rhythm, which is controlled by the:
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