Exp. 18

Question 1

The soma forms a cone shaped __________ as it projects to form an axon.

Answer 1

Axon hillock

Question 2

Are small distal branches of an axon

Answer 2

Telodendria

Question 3

Either schwann cells or extension of _________ can form myelin sheaths

Answer 3

Myelin

Question 4

Gaps between segments pf a myelin sheath are called ?

Answer 4

Nodes of ranvier

Question 5

A group of myelinated fibers may form a region of nerve tissue called ?

Answer 5

White matter

Question 6

The _______ neuron connects an afferent neuron to an efferent neuron

Answer 6

Interneuron

Question 7

A junction between two neurons or between a neuron and an effector is called ?

Answer 7

Synapse

Question 8

Bundle of parallel neurons encased in fibrous connective tissue is called ? (In the PNS)

Answer 8

Nerve

Question 9

Bundle of parallel neurons in the CNS is called ?

Answer 9

Tracts

Question 10

A muscle or gland that is regulated by a nerve input is termed ?

Answer 10

Effector

Question 11

An action potential traveling down a myelinated axon travels __________ (faster/slower) than in an unmyelinated axon

Answer 11

Faster

Question 12

Unmyelinated nerve tissue is called ?

Answer 12

Gray matter

Question 13

In infants, the ________ response is normal when testing the plantar reflex but abnormal in adults

Answer 13

Babinski response

Question 14

When testing the plantar reflex to adults, extension of toes may indicate damage of the ________ somewhere along the reflex arc

Answer 14

Myelin

Question 15

In the _______ reflex, a muscle contracts when the load increases

Answer 15

Stretch

Question 16

The center of the patellar reflex is is the ?

Answer 16

Spinal cord

Question 17

A stretch reflex involving the biceps brachii muscle causes ________ of the elbow if the biceps muscle is streched

Answer 17

Flexion

Question 18

In the triceps reflex demonstration, the triceps muscle was the effector, and one or more ________ were the receptors

Answer 18

Stretch receptor

Question 19

If the Achilles (calcaneal) tendon is tapped, one would expect rhe ankle to ______

Answer 19

Plantar reflex

Question 20

When suddenly illuminated with penlight, the pupil of the eye normally _______

Answer 20

Constricts

Question 21

Components of reflex arc in order in which nerve signals pass through them

Answer 21

Receptor
Sensory neuron
Association neuron
Motor neuron
Effector

Question 22

2 major divisions of nervous system

Answer 22

CNS- includes the brain and spinal cord

PNS- includes all the nerves

Question 23

Cell type that conducts impulses

Answer 23

Neurons or action potentials

Question 24

Supports the neurons

Answer 24

Neuroglia

Question 25

Neurons can be ?

Answer 25

Unipolar- one projectiln Bipolar- two projections Multipolar- many projections

Question 26

Enlarged area filled with cytoplasm and containing nucleus

Answer 26

Soma

Question 27

Soma forms a cone shaped projection called ?

Answer 27

Axon hillock

Question 28

The axon may be wrapped w/ a series of neuroglial cells called ?

Answer 28

Schwann cells

Question 29

Inner layers of shwann cells are filled with _______

Answer 29

Fatty white substance called myelin

Question 30

Segmented sheath of schwann cells is called?

Answer 30

Myelin sheath

Question 31

Gaps between shwann cells is called

Answer 31

Nodes of ranvier

Question 32

Axon is called ?

Answer 32

White fiber or myelinated fiber

Question 33

Group of white fibers together is called ?

Answer 33

White matter

Question 34

Unmyelinated matter or?

Answer 34

Gray matter

Question 35

Multipolar neurons have many projections from the soma called?

Answer 35

Dendrites- sensitive to stimuli

Question 36

Bump on the dendrite is called ?

Answer 36

Gemmule

Question 37

Mediated by a two neuron arc CENTERED in the spinal cord

Answer 37

Patellar reflex or knee jerk reflex

Question 38

Damage or diseased motor neurons in the CNS

Answer 38

Hyperflexia or exaggerated response

Question 39

Degeneration of nerve pathways and other factors

Answer 39

Hypoflexia or inhibited response