$$\text{Blood volume} = 70\% \times \text{body weight}$$

Question 1

Which of the following best describes the main function of the nervous system?

Accepted Answer

To maintain homeostasis by controlling and communicating throughout the body.

Question 2

Which division of the nervous system is responsible for integrating sensory input and coordinating motor output?

Accepted Answer

Central Nervous System (CNS)

Question 3

A patient has damage to the ventral root of a spinal nerve. Which function is most likely impaired?

Accepted Answer

Motor output to effectors

Question 4

Which of the following is an example of a negative feedback loop in homeostasis?

Accepted Answer

Decrease in body temperature triggers shivering to increase temperature.

Question 5

Which structure contains the cell bodies of sensory neurons in the peripheral nervous system?

Accepted Answer

Dorsal root ganglion

Question 6

Which of the following best describes the role of the autonomic (visceral) motor division?

Accepted Answer

It controls involuntary functions such as heart rate and digestion.

Question 7

A somatic reflex arc involves which sequence of structures?

Accepted Answer

Receptor → Sensory neuron → Integration center → Motor neuron → Effector

Question 8

Which of the following is TRUE regarding positive feedback loops?

Accepted Answer

They amplify the original stimulus, leading to an enhanced response.

Question 9

If blood pressure drops below the set point of $$\u003c120/80$$, which effector is activated according to the homeostasis table?

Accepted Answer

Small vessels and heart

Question 10

Which of the following best explains the difference between the CNS and PNS?

Accepted Answer

CNS consists of the brain and spinal cord; PNS consists of nerves and ganglia outside the CNS.

Question 11

Which of the following is NOT a function of the nervous system?

Accepted Answer

Production of red blood cells

Question 12

Which part of the spinal cord contains myelinated axons in the CNS?

Accepted Answer

White matter

Question 13

Which of the following scenarios best illustrates an ipsilateral reflex?

Accepted Answer

Touching a hot stove with your right hand and withdrawing your right hand.

Question 14

Which equation best represents the relationship between blood volume and body weight according to the homeostasis table?

Accepted Answer

$$	ext{Blood volume} = 70\% 	imes 	ext{body weight}$$

Question 15

Which of the following is a correct example of a variable, sensor, and effector in homeostasis?

Accepted Answer

Body temperature, temperature sensors, behavior/sweat glands

Question 16

Which branch of the motor division is responsible for 'rest, digest, and make' functions?

Accepted Answer

Parasympathetic division

Question 17

Which of the following best describes the role of sensory input in the nervous system?

Accepted Answer

It detects changes in the internal and external environment and sends information to the CNS.

Question 18

Which of the following is TRUE about the corpus callosum?

Accepted Answer

It connects the left and right hemispheres of the brain.

Question 19

Which of the following is a correct sequence for a negative feedback loop regulating blood glucose concentration?

Accepted Answer

Increase in blood glucose → stretch receptor in liver → effector: liver/kidney

Question 20

Which of the following is NOT a characteristic of a somatic reflex?

Accepted Answer

It is always under conscious control.

Divisions and Functions of the Nervous System: Anatomy & Physiology Study Notes

Study Guide - Practice Questions