Question 1

Which of the following best describes the microscopic appearance of cardiac muscle tissue?

Accepted Answer

Striated, single nucleus, branched cells, and involuntary

Question 2

A motor unit is defined as:

Accepted Answer

A single neuron and all the muscle fibers it innervates

Question 3

Which of the following is NOT a function of the skeletal muscular system?

Accepted Answer

Pumping blood throughout the body

Question 4

The neuromuscular junction is primarily responsible for:

Accepted Answer

Transmitting electrical impulses from the neuron to the muscle fiber

Question 5

Which structural class of neuron is most commonly found in sensory organs such as the retina?

Accepted Answer

Bipolar neuron

Question 6

Which functional class of neuron is responsible for carrying impulses from the CNS to effectors such as muscles and glands?

Accepted Answer

Motor (efferent) neuron

Question 7

Which equation best represents the relationship between the number of motor units activated and the strength of muscle contraction?

Accepted Answer

$$ F = n 	imes f $$

Question 8

Which of the following best describes the location of gray matter in the spinal cord?

Accepted Answer

Surrounds the central canal and forms an H-shaped region in the center

Question 9

Which of the following is a correct match between structural and functional classes of neurons?

Accepted Answer

Unipolar neurons are typically sensory neurons

Question 10

Which neurotransmitter is released by pre-ganglionic neurons in both the sympathetic and parasympathetic nervous systems?

Accepted Answer

Acetylcholine

Question 11

In a somatic reflex arc, which element is responsible for transmitting the impulse from the sensory neuron to the motor neuron?

Accepted Answer

Interneuron

Question 12

Which of the following best describes the difference in the location of gray and white matter in the brain compared to the spinal cord?

Accepted Answer

In the brain, gray matter is superficial and white matter is deep; in the spinal cord, gray matter is deep and white matter is superficial.

Question 13

Which of the following is NOT a main region of the brain?

Accepted Answer

Spinal cord

Question 14

Which equation best represents the speed of nerve impulse transmission as a function of axon diameter ($$d) $$and myelination ($$m$$)?

Accepted Answer

$$ v = k 	imes d 	imes m $$

Question 15

Which of the following best describes the length of pre-ganglionic and post-ganglionic neurons in the sympathetic nervous system?

Accepted Answer

Short pre-ganglionic, long post-ganglionic

Question 16

Which of the following is a function of astrocytes in nervous tissue?

Accepted Answer

Providing structural support and regulating the blood-brain barrier

Question 17

Which part of a neuron is primarily responsible for receiving incoming signals?

Accepted Answer

Dendrite

Question 18

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

Accepted Answer

Motor output to muscles

Question 19

Which of the following best describes the neurons of the somatic nervous system?

Accepted Answer

Multipolar neurons with cell bodies in the CNS and axons extending to skeletal muscles

Question 20

Which neurotransmitter is released by post-ganglionic neurons in the sympathetic nervous system?

Accepted Answer

Norepinephrine

BIO116 Unit 3 Exam Study Guidance: Muscle and Nervous Tissue

Study Guide - Practice Questions