CH15: Nerve Tissue

Question 1

What is a neuron and what does it do?

Answer 1

basic functional unit of nervous system - transmits nerve impulses

Question 2

What forms the myelin sheath in the CNS

Answer 2

ogliodendrocytes

Question 3

What lines the CSF filled cavities

Answer 3

Ependymal cells

Question 4

What surrounds the cell body of a neuron found in the PNS?

Answer 4

satellite cell

Question 5

What acts as a phagocyte in the CNS?

Answer 5

Microglial

Question 6

What forms the myelin sheath in the PNS?

Answer 6

Schwann cells

Question 7

What controls the chemical environment around neurons in the CNS?

Answer 7

Astrocytes

Question 8

What are specialized supporting cells called?

Answer 8

neuroglia

Question 9

What is the junction or point of close contact between neurons called?

Answer 9

synaptic cleft

Question 10

What is a bundle of axons in the PNS called?

Answer 10

nerve

Question 11

What neuron serves as part of the conduction pathway between sensory and motor neurons

Answer 11

interneuron

Question 12

What are the ganglia and spinal and cranial nerves called?

Answer 12

peripheral nerves

Question 13

What type of neuron conducts towards the CNS from periphery?

What type of neurons conducts away from the CNS towards muscles and glands?

Answer 13

1. efferent neuron
2. afferent neuron

Question 14

What chemicals are released by neurons that stimulate or inhibit other neurons

Answer 14

neurotransmitters

Question 15

What is a collection of neuron cell bodies found in the PNS called?

Answer 15

ganglia

Question 16

What is the location of the endonerium?

Answer 16

surrounds axon

Question 17

What is the location of the perineurium?

Answer 17

surrounds groups of axons

Question 18

What is the location of the epineurium?

Answer 18

surrounds many fascicles

Question 19

What is the main function of connective tissue wrappings in a nerve?

Answer 19

to protect and insulate nerve fibers