Nervous Tissue

Question 0

Controls functions that are under conscious voluntary control with exception of reflex arcs

Answer 0

Somatic NS

Question 1

Mediates reflex actions called REFLEX ARCS

Answer 1

Neural pathways

Question 2

Provides sensory and motor innervations to all parts of the body except viscera, smooth and cardiac muscle and glands

Answer 2

Somatic NS

Question 3

Functional unit of the nervous system

Answer 3

Neuron or Nerve cell

Question 4

Specialized contacts between neurons that provide for transmission of information from one neuron to the next

Answer 4

Synapses

Question 5

Selective restriction of blood-borne substances in the CNS

Answer 5

Blood-brain barrier

Question 6

Neurons that convey impulses from the receptors to the CNS

Answer 6

Sensory

Question 7

Neurons that convey impulses from the CNS or ganglia to effector cells

Answer 7

Motor

Question 8

Neurons that form a communicating and integrating network between the sensory and motor neurons

Answer 8

Interneurons or Intercalated neurons

Question 9

Processes that transmit impulses away from the cell body to a specialized terminal

Answer 9

Axon

Question 10

Processes that transmit impulses from the periphery toward the cell body

Answer 10

Dendrites

Question 11

Neurons that have one axon and two or more dendrites

Answer 11

Multipolar

Question 12

Small molecules that are released at the synapse that affect other neurons as well as muscle cells and glandular epithelium

Answer 12

Neurotransmitters

Question 13

Neurons that have one axon and one dendrite

Answer 13

Bipolar

Question 14

Neurons that have one process, the axon, that divides close to the cell body into two long axonal branches

Answer 14

Pseudounipolar

Question 15

Serves as landmark to distinguish between axons and dendrites in both LM and TEM preparations.

Answer 15

Axon hillock

Question 16

Receptor processes that receive stimuli from other neurons or from the external environment

Answer 16

Dendrites

Question 17

Significantly increase the receptor surface area of a neuron

Answer 17

Dendritic trees

Question 18

Effector processes that transmit stimuli to other neurons or effector cells

Answer 18

Axon

Question 19

The region of the axon between the apex of the axon hillock and the beginning of the myelin sheath is called

Answer 19

Initial segment

Question 20

The initial segment is the site at which an _____ is generated in the axon

Answer 20

Action potential

Question 21

A slowly progressive neurologic disorder caused by the loss of dopamine-secreting cells in the substantia nigra and basal ganglia of the brain

Answer 21

Parkinson’s disease

Question 22

Is a neurotransmitter responsible for synaptic transmission in the nerve pathways coordinating smooth and focused activity of skeletal muscles

Answer 22

Dopamine

Question 23

Slowness of movement

Answer 23

Bradykinesia

Question 24

Inability to initiate movement

Answer 24

Akinesia

Question 25

Represent accumulation of intermediate neurofilaments in association with proteins alpha-synuclein and ubiquitin

Answer 25

Lewy bodies

Question 26

Precursor of DA that can cross the blood-brain barrier

Answer 26

L-Dopa

Question 27

A drug that stimulates release of DA from neurons

Answer 27

Amantidine