Ch7

Question 0

What are two divisions of efferent division of peripheral nervous system?

Answer 0

Somatic nervous system ( voluntary),

Autonomic nervous system ( involuntary)

Question 1

What are two functional classifications in peripheral nervous system?

Answer 1

Sensory (afferent) division, motor (efferent) division

Question 2

What are two structural classifications of peripheral nervous system?

Answer 2

Ganglia,

Nerves outside brain and spinal cord (spinal nerves, cranial nerves)

Question 3

Which supporting cell produce murkiness sheaths in central nervous system ?

Answer 3

Oligodendrocyte

Question 4

What are the regions of brain?

Answer 4

Cerebrum (cerebral hemisphere), diencephalon,cerebellum, brain stem

Question 5

What is the function of astrocytes?

Answer 5

Anchor neurons and blood vessels,
Maintain extracellular environment around neurons,
Assist in the formation of the blood-brain barrier

Question 6

What are the neuroglial cells found in the CNS?

Answer 6

Microglial cells, obligodendrocytes, ependymal cells, astrocytes

Question 7

What are the functions of myelin sheath?

Answer 7

Protect and insulate the axons, speed up conduction of action potential

Question 8

What are three basic regions of each cerebral hemisphere?

Answer 8

Cortex of gray matter, internal area of white matter, basal nuclei

Question 9

What is composition of white matter of the brain?

Answer 9

Myelinated nerve fibers

Question 10

What name is given to the cerebrospinal fluid filled cavities within the brain?

Answer 10

Ventricles

Question 11

Transmission of nerve impulses along ANS pathways is generally much slower than along somatic fibers. Why?

Answer 11

Postganglionic fibers of ANS are u myelinated fibers, which conduct much more slowly than the myelinated fibers that are typical of somatic nerve fibers.

Question 12

Why must premature babies be placed in incubators until their hypothalamus mature?

Answer 12

Due to inability to regulate the body temperature

Question 13

Where the pineal gland is located?

Answer 13

In the epithalamus

Question 14

What is the region where there is a gross crossover of fibers of descending pyramid tracts?

Answer 14

Medulla

Question 15

What is the brain area through which all the sensory input is relayed to get to the cerebral cortex?

Answer 15

Thalamus

Question 16

Which brain area is most concerned with equilibrium, body posture, and coordination of motor activity?

Answer 16

Cerebellum

Question 17

Motor efferent neuron carries signals from — to —.

Answer 17

The CNS, the PNS

Question 18

How many components make up a simple reflex arc?

Answer 18

5

A sensory receptor
An effetor organ (muscle or gland)
Sensory and motor neuron (to connect the two above)
The CNS integration center
(Synapse or interneuron between sensory and motor neuron)

Question 19

Which is the only cranial nerve that leave face and neck region and travels down to the heart, lungs, and stomach?

Answer 19

X vagus

Question 20

What structure detects the amount of stretch or tension in skeletal muscle, tendon, and joint?

Answer 20

Proprioceptors

Question 21

What are group of neural cell bodies in CNS?

Answer 21

Neuclei

Question 22

The preganglionic neurons of the parasympathetic division of the autonomic nervous system (ANS) are located in the brain nuclei of which cranial nerve?

Answer 22

III oculomotor
VII facial
IX glosspharyngeal
X vagus

Question 23

A neurotransmitter is released from the —.

Answer 23

Presynaptic terminal

Question 24

The tightly packed coil of the Schwann cell plasma membranes that encircle certain kinds of axons is termed the —.

Answer 24

Myelin sheath

Question 25

What plays an important role in regulating voluntary movement?

Answer 25

Basal ganglia

Question 26

All motor and association neurons are —.

Answer 26

Multipolar