Neurophysiology Basics - MCQs for Competitive Exams

Neurophysiology Basics - Physiology MCQ Practice

Q. What is the primary effect of the parasympathetic nervous system?

Solution

The parasympathetic nervous system primarily promotes 'rest and digest' activities, increasing digestive activity.

Correct Answer: B — Increased digestive activity

Q. What is the primary function of the central nervous system (CNS)?

Solution

The central nervous system (CNS) processes and integrates information received from the peripheral nervous system.

Correct Answer: B — To process and integrate information

Q. What is the role of the sodium-potassium pump in neurons?

Solution

The sodium-potassium pump actively transports sodium out of the cell and potassium into the cell, helping to maintain the resting membrane potential.

Correct Answer: A — To maintain resting membrane potential

Q. What is the threshold potential for initiating an action potential in most neurons?

Solution

The threshold potential for initiating an action potential is typically around -55 mV.

Correct Answer: B — -55 mV

Q. Which glial cell type is responsible for the formation of the blood-brain barrier?

Solution

Astrocytes are responsible for the formation and maintenance of the blood-brain barrier, regulating the passage of substances into the brain.

Correct Answer: A — Astrocytes

Q. Which neurotransmitter is primarily involved in the 'fight or flight' response?

Solution

Norepinephrine is the primary neurotransmitter involved in the 'fight or flight' response, preparing the body for stressful situations.

Correct Answer: C — Norepinephrine

Q. Which part of the neuron receives incoming signals?

Solution

Dendrites are the parts of the neuron that receive incoming signals from other neurons.

Correct Answer: B — Dendrites

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