MCQ 141:
What is the main role of the peripheral nervous system?
A) Processing sensory information
B) Connecting the brain and spinal cord to the rest of the body
C) Regulating involuntary functions
D) Coordinating complex behaviors
Answer: B) Connecting the brain and spinal cord to the rest of the body
Explanation: The peripheral nervous system includes all nerves outside the central nervous system, connecting the brain and spinal cord to muscles, organs, and sensory receptors.
MCQ 142:
Which brain structure is primarily involved in visual processing?
A) Temporal lobe
B) Occipital lobe
C) Parietal lobe
D) Frontal lobe
Answer: B) Occipital lobe
Explanation: The occipital lobe is specifically responsible for processing and interpreting visual information received from the eyes.
MCQ 143:
Which part of the neuron releases neurotransmitters?
A) Dendrites
B) Axon terminals
C) Soma
D) Myelin sheath
Answer: B) Axon terminals
Explanation: Axon terminals release neurotransmitters into the synaptic cleft, allowing communication with other neurons.
MCQ 144:
What is the primary function of the temporal lobe?
A) Processing auditory information
B) Regulating motor function
C) Controlling balance
D) Coordinating sensory input
Answer: A) Processing auditory information
Explanation: The temporal lobe is involved in processing auditory stimuli and is important for language comprehension and memory.
MCQ 145:
Which neurotransmitter is primarily inhibitory in the central nervous system?
A) Dopamine
B) Serotonin
C) GABA
D) Norepinephrine
Answer: C) GABA
Explanation: GABA (gamma-aminobutyric acid) is the main inhibitory neurotransmitter in the brain, helping to reduce neuronal excitability.
MCQ 146:
What is the role of the limbic system?
A) Regulating autonomic functions
B) Processing emotions and memories
C) Controlling motor functions
D) Integrating sensory information
Answer: B) Processing emotions and memories
Explanation: The limbic system is involved in emotional regulation, memory formation, and other aspects of behavior.
MCQ 147:
Which part of the brain is responsible for regulating basic life functions such as breathing and heart rate?
A) Cerebellum
B) Brainstem
C) Thalamus
D) Hypothalamus
Answer: B) Brainstem
Explanation: The brainstem regulates essential autonomic functions like breathing, heart rate, and blood pressure.
MCQ 148:
Which type of sensory receptor responds to changes in temperature?
A) Mechanoreceptor
B) Thermoreceptor
C) Photoreceptor
D) Chemoreceptor
Answer: B) Thermoreceptor
Explanation: Thermoreceptors are specialized sensory receptors that detect changes in temperature, allowing the body to respond to thermal stimuli.
MCQ 149:
Which part of the neuron receives incoming signals?
A) Axon
B) Dendrites
C) Axon terminals
D) Myelin sheath
Answer: B) Dendrites
Explanation: Dendrites are the parts of the neuron that receive signals from other neurons or sensory receptors.
MCQ 150:
Which brain structure is primarily involved in maintaining equilibrium and balance?
A) Cerebellum
B) Cerebrum
C) Thalamus
D) Medulla oblongata
Answer: A) Cerebellum
Explanation: The cerebellum plays a key role in maintaining balance and coordinating movements, crucial for physical stability.
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