nervous tissue

Question 1

main two parts of the nervous system?

Answer 1

Central nervous system

Peripheral nervous system

Question 2

three main functions of the nervous system

Answer 2

Sensory function
Integrative function
Motor function:

Question 3

Sensory function

Answer 3

Receptors in peripheral nervous system detect stimuli.

Sensory information transmitted to central nervous system.

Question 4

Integrative function:

Answer 4

Central nervous system processes sensory information

via integration and analysis. An appropriate outcome is decided.

Question 5

Motor function

Answer 5

: Central nervous system transmits motor information to

peripheral nervous system. Action carried out by effectors.

Question 6

main structures of CNS

Answer 6

brain and spinal cord

Question 7

main structures of PNS

Answer 7

Cranial nerves
spinal nerves
ganglia
sensory receptors

Question 8

Divisons of PNS

Answer 8

Somatic nervous system
autonomic nervous system
enteric nervous system

Question 9

Somatic nervous system consist of:

Answer 9

Special sensors.
skeletal muscle
sensory division - towards CNS
motor division - away from CNS

Question 10

list all of the special sensors

Answer 10

sightSight, Sound, Smell, Taste, Touch and Balance

Question 11

autonomic division

Answer 11

responsible for all automated action such as breathing heartbeat, digestion, releasing hormones
sensory and motor portions

Question 12

two divisions of the autonomic nervous system

Answer 12

Parasympathetic

sympathetic

Question 13

enteric nervous

Answer 13

gut

sensory and motor portions

Question 14

neuron

Answer 14

functioning unit of nervous tissue, electrically exited

Question 15

many neurons

Answer 15

neural pathways

Question 16

Neuroregeneration

Answer 16

Refers to the regrowth or repair of nervous tissue or cells.

Question 17

why is there little to no repair of neurons in CNS?

Answer 17

Little to no repair in CNS due to inhibitory influences from neuroglia, absence of growth-stimulating cues, and rapid formation of scar tissue.

Question 18

PNS - when is Neuroregeneration possible

Answer 18

repair is possible if the cell body is intact, Schwann cells are functional, and scar tissue formation does not occur too rapidly.

Question 19

three steps of Neuroregeneration

Answer 19

chromatolysis, Wallerian degeneration, and formation or a regeneration tube.

Question 20

cluster of neural cell bodies in CNS

Answer 20

Necleus

Question 21

cluster on neural bodies in PNS

Answer 21

Ganglia - ganglion

Question 22

bundle of axons in PNS

Answer 22

nerve

Question 23

bundle of axons in CNS

Answer 23

tract

Question 24

white matter

Answer 24

myelinated axons

Question 25

neuroglia

Answer 25

Includes all non-neuronal cells in the nervous system Not electrically excitable Able to multiply and divide

Question 26

Astrocytes

Answer 26

Most numerous neuroglia Provide support to neurons Maintain blood-brain-barrier Maintain local chemical environment

Question 27

Oligodendrocytes

Answer 27

* Fewer processes than an astrocyte * Form and maintain myelin sheath * Can extend its processes to up 50 axons

Question 28

Microglia

Answer 28

•Small cells with thin processes •Function as phagocytes •Remove cellular debris, microbes, and damaged nervous tissue

Question 29

Ependymal Cells

Answer 29

* Cuboidal cells with microvilli and cilia * Line ventricles and central canal * Produce and circulate CSF

Question 30

Schwann Cells

Answer 30

* Form and maintain myelin sheath in PNS * Each Schwann cell myelinates one axon * Involved in axon regeneration

Question 31

Satellite Cells

Answer 31

•Surround cell bodies of neurons of PNS ganglia •Provide structural support •Exchange materials between cell bodies and interstitial fluid