Nervous tissue (ex.III)

Question 1

What is another name for the cell body of a neuron?

Answer 1

perikaryon

Question 2

What is the basophilic cytoplasm of a neuron know as?

Answer 2

Nissl substance

Question 3

The membrane of an axon is called ____

Answer 3

axolemma

Question 4

A telodendron is ____

Answer 4

the end of an axon where synapses occur

Question 5

A neuronal dendrite’s main function is to ___

Answer 5

receive stimuli via synapse

Question 6

list the 3 types of synapses

Answer 6

1. axosomatic (to cell body)
2. axodendritic (to dendrite)
3. axoaxonic (to axon hillock)

Question 7

A cluster of neurons in the PNS is called a ____ where a cluster of neurons in the CNS is called a ____.

Answer 7

PNS: ganglia
CNS: nuclei

Question 8

Free(naked) nerve endings take signals back to the brain. _____ sense pain and itch. _____ sense temperature.

Answer 8

Nociceptors

Thermoreceptors

Question 9

____ are encapsulated nerve endings that sense touch on pressure.

Answer 9

mechanoreceptors

Question 10

Neuroglia are supporting cells within the brain. list the 4 types

Answer 10

• astrocytes
• oligodendrocytes
• ependymal cells
• microglia

Question 11

_____ are neuroglia cells that have foot like projections that contribute to the blood brain barrier.

Answer 11

astrocytes

Question 12

_____ contribute to the immune system of the brain by MHC II expression.

Answer 12

astrocytes

Question 13

____ are neuroglia cells that maintain myelin in the CNS.

Answer 13

oligodendrocytes

myelin is actually an extension of these cells

Question 14

What are the resident macrophages of the CNS?

Answer 14

microglia

Question 15

When activated during necrosis or inflammation, microglia are called ___

Answer 15

Gitter cells

Question 16

Gitter cells phagocytose _____

Myelophages phagocytose ____

Answer 16

extracellular material

myelin

Question 17

Which region of the CNS is rich in cell bodies but limited in numbers of myelinated axons?

Answer 17

Gray matter

Question 18

Which region of the CNS is rich in myelinated axons?

Answer 18

White matter

Question 19

____ are neuroglia cells that line cavities of the CNS and form cerebral spinal fluid.

Answer 19

Ependymal cells

Question 20

Myelin synthesized by ____ in the CNS and ____ in the PNS.

Answer 20

CNS: oligodendrocytes
PNS: Schwann cells

Question 21

Which part of the brain is responsible for memory? This is the location of many neurons that are sensitive to hypoxia and hypoglycemia.

Answer 21

hippocampus

can be damaged during seizures

Question 22

Which part of the brain is responsible for coordinated body movement?

Answer 22

cerebellum

Question 23

What are the components of the meniges?

Answer 23

• dura mater
• arachnoid membrane
• pia mater

Question 24

The subarachnoid space contains ____.

Answer 24

cerebral spinal fluid

Question 25

In the PNS nerves are surrounded by _____, fascicles and surrounded by____, and nerve fibers are surrounded by_____.

Answer 25

epineurium, perineurium, endoneurium