Question 1

Which division of the nervous system is primarily responsible for integrating sensory information and coordinating voluntary motor activity?

Accepted Answer

Central nervous system

Question 2

A patient presents with muscle weakness and inability to move their limbs voluntarily. Which part of the nervous system is most likely affected?

Accepted Answer

Somatic motor division

Question 3

Which of the following best describes the function of axon terminals (synaptic knobs)?

Accepted Answer

They release neurotransmitters to communicate with target cells

Question 4

During the resting membrane potential, which ion is most abundant outside the neuron?

Accepted Answer

Sodium ($$Na^+)$$

Question 5

Which equation can be used to calculate the equilibrium potential for a specific ion across a membrane?

Accepted Answer

$$E_{ion} = \frac{RT}{zF} \ln \frac{[ion]_{out}}{[ion]_{in}}$$

Question 6

A neuron receives multiple excitatory and inhibitory inputs at the same time. What is this process called?

Accepted Answer

Convergence

Question 7

Which of the following best describes the absolute refractory period of a neuron?

Accepted Answer

The period when no new action potential can be generated, regardless of stimulus strength

Question 8

What is the primary function of the sodium-potassium pump ($$Na^+/K^+$$ ATPase) in neurons?

Accepted Answer

To maintain the resting membrane potential by moving $$3$$ $$Na^+$$ out and $$2$$ $$K^+ in$$

Question 9

Which of the following events occurs first during the propagation of an action potential along an axon?

Accepted Answer

Sodium channels open, $$Na^+$$ enters the cell

Question 10

A local anesthetic blocks voltage-gated sodium channels in sensory neurons. What is the most likely effect?

Accepted Answer

Neurons will be unable to generate action potentials

Question 11

Which neurotransmitter is released at cholinergic synapses?

Accepted Answer

Acetylcholine

Question 12

Which of the following best describes saltatory conduction?

Accepted Answer

Action potentials jump from one node of Ranvier to the next

Question 13

If the postsynaptic receptor site for a neurotransmitter were completely blocked, what would happen?

Accepted Answer

The postsynaptic neuron would not respond to the neurotransmitter

Question 14

Which of the following is a function of neuroglia in the central nervous system?

Accepted Answer

Support and protect neurons

Question 15

Which of the following best describes an excitatory postsynaptic potential (EPSP)?

Accepted Answer

It moves the membrane potential of the postsynaptic neuron closer to threshold

Question 16

Which of the following is the correct sequence of events for an action potential?

Accepted Answer

Depolarization, repolarization, hyperpolarization

Question 17

A neuron is exposed to a toxin that prevents potassium channels from opening. What is the most likely effect on the action potential?

Accepted Answer

The neuron will not repolarize properly

Question 18

Which of the following is a characteristic of a converging neural circuit?

Accepted Answer

Multiple presynaptic neurons synapse with a single postsynaptic neuron

Question 19

Which of the following best explains why neurons are metabolically active?

Accepted Answer

They require constant ATP to maintain ion gradients and membrane potentials

Question 20

Which of the following is true about presynaptic and postsynaptic neurons?

Accepted Answer

Presynaptic neurons release neurotransmitters into the synaptic cleft

Study Guide: Nervous System Structure and Function

Study Guide - Practice Questions