Question 1

Which of the following best describes the primary function of interneurons in the nervous system?

Accepted Answer

They connect neurons within the CNS and facilitate communication between sensory and motor pathways.

Question 2

A patient suffers damage to the axon hillock of a neuron. Which process is most likely to be directly affected?

Accepted Answer

Integration and initiation of action potentials.

Question 3

Which glial cell type is responsible for producing myelin in the central nervous system (CNS)?

Accepted Answer

Oligodendrocytes

Question 4

A reflex arc typically involves which sequence of components?

Accepted Answer

Receptor → Sensory neuron → Interneuron → Motor neuron → Effector

Question 5

Which equation correctly represents the relationship between the speed of nerve impulse conduction ($$v$$), axon diameter ($$d$$), and myelination ($$m$$)?

Accepted Answer

$$v = k 	imes d 	imes m$$

Question 6

A patient presents with loss of motor function but intact sensory function. Which part of the nervous system is most likely damaged?

Accepted Answer

Motor neurons in the peripheral nervous system

Question 7

Which of the following best describes the role of astrocytes in the CNS?

Accepted Answer

They form the blood-brain barrier and regulate the extracellular environment.

Question 8

Which structural type of neuron is most commonly found in sensory pathways?

Accepted Answer

Unipolar (pseudounipolar) neuron

Question 9

A nerve is composed of several layers of connective tissue. Which sequence correctly lists these layers from innermost to outermost?

Accepted Answer

Endoneurium → Perineurium → Epineurium

Question 10

Which division of the nervous system is responsible for voluntary control of skeletal muscles?

Accepted Answer

Somatic nervous system

Question 11

A patient with multiple sclerosis experiences demyelination. Which equation best describes the effect on nerve conduction velocity ($$v) if $$myelination ($$m) $$decreases?

Accepted Answer

$$v \downarrow as$$ $$m \downarrow$$

Question 12

Which of the following is NOT a function of the central nervous system (CNS)?

Accepted Answer

Production of myelin in peripheral nerves

Question 13

Which type of neuronal circuit is best suited for amplifying a signal to multiple postsynaptic neurons?

Accepted Answer

Diverging circuit

Question 14

Which of the following best describes the difference between the sympathetic and parasympathetic divisions of the autonomic nervous system?

Accepted Answer

Sympathetic division increases heart rate; parasympathetic division decreases heart rate.

Question 15

Which glial cell type is found in the peripheral nervous system and is responsible for myelination?

Accepted Answer

Schwann cells

Question 16

A patient is unable to transmit sensory information from the skin to the CNS. Which neuron type is most likely affected?

Accepted Answer

Sensory neuron

Question 17

Which of the following best describes the function of the axon in a neuron?

Accepted Answer

Conducts electrical impulses away from the cell body toward other neurons or effectors.

Question 18

Which equation best represents the relationship between the number of synapses ($$n) $$and the complexity of neuronal integration ($$C$$)?

Accepted Answer

$$C \propto n$$

Question 19

Which of the following is a correct statement about the organization of the nervous system?

Accepted Answer

The CNS consists of the brain and spinal cord, while the PNS includes cranial and spinal nerves.

Question 20

Which of the following best explains why myelinated axons conduct impulses faster than unmyelinated axons?

Accepted Answer

Myelin allows for saltatory conduction, where action potentials jump between nodes of Ranvier.

Overview and Structure of the Human Nervous System

Guida di studio - Domande di pratica

Study guide - Flashcard