Q: Which equation best represents the estimated number of connections in the human brain, given approximately 100 billion neurons and each making about 1,000 connections?

$100 \times 10^9 \times 1,000 = 100 \times 10^{12}$

Question 1

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

Accepted Answer

To provide the CNS with information about the external and internal environment

Question 2

A tennis player sees the ball coming and plans their return shot. Which brain regions are primarily involved in these two processes?

Accepted Answer

Visual cortex for seeing; premotor cortex for planning

Question 3

Which subdivision of the Peripheral Nervous System (PNS) is responsible for regulating smooth muscle and exocrine glands?

Accepted Answer

Autonomic

Question 4

A patient suffers damage to the ventral horn of their spinal cord. Which function is most likely to be impaired?

Accepted Answer

Sending motor commands to muscles

Question 5

Which of the following correctly matches a cerebral cortex lobe with its primary function?

Accepted Answer

Temporal lobe – taste

Question 6

Which neuron type vastly outnumbers the others in the human nervous system and is crucial for integrating multiple inputs?

Accepted Answer

Interneurons

Question 7

Which of the following best explains why the cerebral cortex is deeply convoluted?

Accepted Answer

To allow more neurons to fit within the same volume

Question 8

If a person has difficulty with bodily sensation and spatial processing, which lobe of the cerebral cortex is most likely affected?

Accepted Answer

Parietal lobe

Question 9

Which of the following is TRUE regarding the organization of the spinal cord?

Accepted Answer

The dorsal horn contains sensory neuron cell bodies

Question 10

Which term pair is correctly matched with its anatomical direction?

Accepted Answer

Medial – towards the midline

Question 11

Which of the following best describes the role of association areas in the cerebral cortex?

Accepted Answer

They integrate diverse information for perception, movement, and motivation

Question 12

A researcher is studying the somatotopic organization of the ventral horn. Which statement is most accurate?

Accepted Answer

Medial to lateral goes proximal to distal; dorsal to ventral goes flexor to extensor

Question 13

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

Accepted Answer

Peripheral nerves

Question 14

Which equation best represents the estimated number of connections in the human brain, given approximately 100 billion neurons and each making about 1,000 connections?

Accepted Answer

$100 	imes 10^9 	imes 1,000 = 100 	imes 10^{12}$

Question 15

Which of the following is a correct description of the function of the pons in the brainstem?

Accepted Answer

Acts as a relay between higher brain regions, cerebellum, and spinal cord

Question 16

Which neuron type is also called 'efferent' and is responsible for controlling muscle contraction?

Accepted Answer

Motor neuron

Question 17

Which subdivision of the PNS is responsible for transmitting information about muscle and limb position to the CNS?

Accepted Answer

Somatic

Question 18

A lesion in the primary motor cortex would most likely result in which of the following deficits?

Accepted Answer

Difficulty in triggering and executing movement commands

Question 19

Which of the following best describes the difference between gray matter and white matter in the spinal cord?

Accepted Answer

Gray matter contains cell bodies; white matter contains myelinated axons

Question 20

Which of the following is a correct example of a real-world application of motor control involving both sensory and motor systems?

Accepted Answer

Catching a ball thrown towards you

Introduction to Motor Control: Nervous System Organization and Function

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