The Nervous System Anatomy

Question 1

Primary components of nervous stem is

Answer 1

CNS - brain and spinal cord

PNS cranial and spinal N.

Question 2

Neurons derived from

Answer 2

ectoderm, neural tube, neural crest cells or ectodermal placodes

Question 3

What part of the neuron contains the nucleus and metabolic machinery of the cell?

Answer 3

cell body (trophic)

Question 4

What part of the neuron is receptive

Answer 4

dendrites

Question 5

Conductive part of the neuron

Answer 5

axon

Question 6

Transmissive part of the neuron

Answer 6

telodendria

Question 7

Groups of neuron cell bodies that lie peripheral to the CNS in vertebrates

Answer 7

ganglia

Question 8

The term is defined as cell body located near the MIDDLE of the axon; characteristic of retinal neurons

Answer 8

Bipolar neurons

Question 9

The term is defined as cell body lies very close to dendrites; Characteristic of MOTOR neuron

Answer 9

Multipolar neurons

Question 10

What is based on the concentration of Na+ and

K+ ions inside and outside of the cell

Answer 10

Resting potential

Question 11

What maintains the myelin sheath provides nutrient support and maintains homeostasis?

Answer 11

Neuroglia cells

Question 12

Origin of Neural crest cells that forms a thin sheath surrounding unmyelinated axon

Answer 12

Schwann cells

Question 13

The periodic gap in the insulating sheath (myelin) on the axon of certain

Answer 13

Node of Ranvier

Question 14

Oligodendrocytes 
Originate: 
Myelinate axons in the CNS
and forms:  
Primary responsibility:

Answer 14

Ectoderm

CNS white matter (unmyelinated axons are grey matter)

maintenance, generates myelin sheath around axons

Question 15

Star-shaped nutritive, supportive glial cells of CNS
Most numerous brain cell
Controls blood-brain barrier and blood flow
nerve repair

Answer 15

Astrocytes

Question 16

Macrophage of CNS Phagocytes, small cells from mesoderm

maintaining CNS health

Answer 16

microglia

Question 17

Small glia that surrounds neurons’ sensory ganglia in the ANS

Answer 17

satellite cells

Question 18

sensitive to injury and may exacerbate pathological pain

Answer 18

PNS satellite glia

Question 19

Ependymal ciliated cells derived from __

forms lining of the __

Answer 19

primitive neural ectoderm

brain/spinal cord cavities

Question 20

Primary afferent sensory neurons carry impulses from

Answer 20

free nerve endings

Question 21

Motor efferent neurons carry impulses from CNS to

Answer 21

effectors muscles or glands

Question 22

What receives a signal from the sensory, integrates info, and sends signals to motor neurons?

Answer 22

Interneurons

Question 23

What relates to the skin and its derivatives, and to voluntary muscles

Answer 23

somatic fibers

Question 24

What related to involuntary muscles and glands of the organ systems

Answer 24

Visceral fibers

Question 25

What is the location of dendrites and cell bodies of motor neurons?

Answer 25

ventral horn

Question 26

The dorsal horn receives termination of

Answer 26

primary sensory neurons