Practicum 4 Review Questions

Question 1

Where are ependymal cells located and what are their function?

Answer 1

Resemble a cuboidal epithelium cell and line the internal cavities of the brain and spinal cord.

Their function is to produce cerebrospinal fluid and circulate it with their cilia.

Question 2

What cranial nerve is associated with roman numeral number I? Is this nerve sensory, motor, or both?

Answer 2

Olfactory Nerve; sensory

Question 3

Which nerve fibers come from the ventral root? (sensory or motor)

Answer 3

motor

Question 4

What is the function of reflexes?

Answer 4

Reflexes are used to protect us against injury

Somatic reflexes activate skeletal muscle
Autonomic reflexes activate visceral effectors (smooth muscle, cardiac muscle, or glands)

Question 5

What cranial nerve is associated with roman numeral XII? Is this nerve sensory, motor, or both?

Answer 5

Hypoglossal Nerve; motor

Question 6

Where are astrocytes located and what are their function?

Answer 6

Located in CNS in the brain.

They form a supportive framework and form the blood brain barrier, scar tissue, and fill space formerly occupied by damaged neurons

Question 7

Which nerve fibers come from the dorsal root? (sensory or motor)

Answer 7

Sensory

Question 8

What cranial nerve is associated with roman numeral V? Is this nerve sensory, motor, or both?

Answer 8

Trigeminal Nerve; BOTH but mainly sensory.

Has 3 branches: ophthalmic, maxillary, mandibular

Question 9

Where are Nodes of Ranvier located and what are their function?

Answer 9

Located in the axon of a neuron - gap between myelin sheath.

Facilitates the
rapid conduction of nerve impulses

Question 10

What cranial nerve is associated with roman numeral IX? Is this nerve sensory, motor, or both?

Answer 10

Glossopharyngeal; both

Question 11

Where are microglia found and what are their function?

Answer 11

Found in the CNS.

They are small macrophages that develop from white blood
cells called monocytes

Question 12

What cranial nerve is associated with roman numeral II? Is this nerve sensory, motor, or both?

Answer 12

Optic nerve; sensory

Question 13

What is the function of the parietal lobe?

Answer 13

Primary site for receiving and interpreting signals of the general senses

Question 14

What cranial nerve is associated with roman numeral VII? Is this nerve sensory, motor, or both?

Answer 14

Facial Nerve; both

Question 15

What is the function of the occipital lobe?

Answer 15

Principle visual center of the brain

Question 16

Where are oligodendrocytes found and what is their function?

Answer 16

Located around CNS nerve fibers.

Function is to insulate the nerve fiber from the
extracellular fluid (myelin sheath)

Question 17

What cranial nerve is associated with roman numeral XI? Is this nerve sensory, motor, or both?

Answer 17

Accessory Nerve; motor

Question 18

What are the steps of the reflex arc?

Answer 18

Receptor, sensory neuron, integration center, motor neuron, effector

Question 19

What cranial nerve is associated with roman numeral IV? Is this nerve sensory, motor, or both?

Answer 19

Trochlear Nerve; motor

Question 20

What is the function of the frontal lobe?

Answer 20

Voluntary motor functions, motivation, planning, judgment, mood, emotion,
social judgment, and aggression

Question 21

Define intrinsic reflexes vs acquired reflexes

Answer 21

Intrinsic = rapid, predictable motor response to a stimulus; unlearned, born with it; regulated by brain and spinal cord

Acquired = results from practice or repetition

Question 22

Where are schwann cells found and what are their function?

Answer 22

Only found in PNS and envelop nerve fibers of the PNS.

Produce a myelin sheath similar to the ones produced by oligodendrocytes.
Assist in regeneration of damaged fibers.

Question 23

What cranial nerve is associated with roman numeral III? Is this nerve sensory, motor, or both?

Answer 23

Oculomotor Nerve; motor

Question 24

What are the properties of a reflex?

Answer 24

Reflexes require stimulation,
reflexes are quick,
reflexes are involuntary,
reflexes
are stereotyped

Question 25

What is the function of the temporal lobe

Answer 25

Hearing, smell, learning, and some aspects of vision and emotion

Question 26

What is the functions of the pons? The function of the medulla oblongata?

Answer 26

Pons = sleep, respiration, hearing, balance

Medulla oblongata = breathing, heart beats, BP, swallowing

Question 27

What cranial nerve is associated with roman numeral VIII? Is this nerve sensory, motor, or both?

Answer 27

Vestibulocochlear; sensory

Question 28

What cranial nerve is associated with roman numeral VI? Is this nerve sensory, motor, or both?

Answer 28

Abducens; motor

Question 29

Where are satellite cells found and what are their function?

Answer 29

Surround the neurosomas in ganglia of the PNS.

They provide electrical
insulation around the soma. Regulate the chemical environment of the neurons.

Question 30

What cranial nerve is associated with roman numeral X? Is this nerve sensory, motor, or both?

Answer 30

Vagus; both