Peripheral and Autonomic Nervous System lab 13

Question 1

Neuron

Answer 1

Are large cells that transmit and generate messages in the form of nerve impulses or neuronal action potentials.

Question 2

Neuroglial cell

Answer 2

Are much smaller than neurons, and they outnumber neurons about 50 to 1- no small feat considering that the nervous system contains about a trillion neurons.

Question 3

Cell body

Answer 3

is the biosynthetic center of the neuron, containing the nucleus and many of the organelles.

Question 4

Axon

Answer 4

Process of the neuron that generates and transmits action potentials.

Question 5

Cervical plexus

Answer 5

The ventral rami of C1-C4 ( and a small contribution from C5) that serve the head and neck.

Question 6

Cranial Nerve

Answer 6

Peripheral nerves that attach to the brain.

Question 7

Endoneurium

Answer 7

The CT sheath that surrounds each individual axon

Question 8

Parasympathetic nervous system

Answer 8

The branch of the ANS that adapts the body for rest and digestion

Question 9

Brachial plexus

Answer 9

The ventral rami of C5-T1 that serve the upper limb.

Question 10

Which main structure does the femoral nerve supply?

Answer 10

Anterior thigh muscles, skin on anterior and medial thigh and leg.

Question 11

Which main structure does the phrenic nerve supply?

Answer 11

Diaphragm muscle

Question 12

Which main structure does the inferior gluteal nerve supply?

Answer 12

Gluteus maximus muscle

Question 13

Which main structure does the common fibular nerve supply?

Answer 13

Anterior and lateral leg muscles and skin

Question 14

Which main structure does the radial nerve supply

Answer 14

Muscles on the posterior arm that extend the forearm, muscles of the forearm that extend the hand, skin on lateral hand.

Question 15

Which main structure does the Ulnar nerve supply?

Answer 15

Muscles of the forearm that flex the hand, most intrinsic hand muscles, skin on medial hand.

Question 16

Is constriction of blood vessels serving skin and abdominal viscera an effect of the sympathetic nervous system (SNS) or the parasympathetic nervous system (PSNSP)

Answer 16

SNS

Question 17

Is increased micturition an effect of the sympathetic nervous system (SNS) or the parasympathetic nervous system (PSNS)

Answer 17

PSNS

Question 18

Put the events of a reflex arc in order from the first event through the last event.

Answer 18

1. Sensory receptor detects the stimulus.
2. Sensory neurons bring the stimulus to the CNS.
3. CNS processes and integrates the information.
4. CNS sends output via motor neurons to an effector.
5. The muscle contracts.

Question 19

Is decreased secretion from digestive glands an effect of the sympathetic nervous system (SNS) or the parasympathetic nervous system (PSNSP)

Answer 19

SNS

Question 20

Is changing the shape of the lens for near vision an effect of the sympathetic nervous system (SNS) or the parasympathetic nervous system (PSNS)

Answer 20

PSNS

Question 21

Is the dilation of the bronchioles an effect of the sympathetic nervous system (SNS) or the parasympathetic nervous system (PSNS)

Answer 21

SNS

Question 22

Is increased blood pressure an effect of the sympathetic nervous system (SNS) or the parasympathetic nervous system (PSNS)

Answer 22

SNS

Question 23

Damage to which spinal nerves might produce the inability to dorsiflex the foot?

Answer 23

Common fibular nerve

Question 24

Sympathetic stimulation of the iris causes

Answer 24

Pupillary dilation

Question 25

The autonomic subdivision of the vertebrate nervous system innervates all but which of the following?

Answer 25

Skeletal muscles

Question 26

Damage to which spinal nerves might produce the inability to breathe

Answer 26

Phrenic nerve

Question 27

Damage to which spinal nerves might produce the inability to feel the skin over the anterolateral thigh

Answer 27

Lateral femoral cutaneous nerve

Question 28

The parasympathetic division

Answer 28

Mediates many reflexes that regulate the digestive, urinary, and reproductive systems.

Question 29

Damage to which spinal nerves might produce the inability to extend the forearm and hand

Answer 29

Radial nerve