Neuro Stuff

Question 0

Motor efferent neurons

Answer 0

Efferent= exit

Carry info FROM CNS to effectors

2 types:

1. Somatic motor neurons: innervate skeletal muscles n is under voluntary control
2. Autonomic motor neurons: innervate visceral smooth muscle, cardiac muscle n glands. Involuntary. Further divided to SNS and PNS nervous systems

Question 1

Sensory afferent neurons

Answer 1

Afferent= arrive

Carry info TO the CNS
2 categories of sensory neurons:
1.Somatic sensory neurons: transmit info from skin/skeletal muscle to CNS
2. Visceral Sensory neurons: transmit info from internal organs n blood vessles to CNS

Question 2

PNS

Answer 2

Made of spinal nerves (nerves that come off spinal cord) and 
Cranial nerves ( nerves that come off brain + brain stem)

Question 3

CNS

Answer 3

= brain n spinal cord

Question 4

Visceral

Answer 4

Organs

Question 5

Anterior

Answer 5

At front of body

Question 6

Posterior

Answer 6

= bak of body

Question 7

Glial cells

Answer 7

Support n protect neurons

Question 8

Soma

Answer 8

Cell body of neuron

Clusters of soma in CNS= nucleus
Clusters of soma in PNS= ganglion

Question 9

Telondendria

Answer 9

Processes at end of axon

Question 10

Myelin sheath

Answer 10

Formed by wrappings of either
Schwann cells/neurolemmocytes (PNS) or
Oligodendrocytes (CNS) around axons

Made of fat

Question 11

Meninges

Answer 11

3 layers of protection for the spinal cord

From outside to in:
Dura mater
Arachnoid mater
Pia mater

Question 12

Epidural space

Answer 12

Contains fat
Outside of dura mater bw dura mater n bone

Where we inject!! Lumbar spine injection stuff

Question 13

Subdural space

Answer 13

Bw dura mater and arachnoid

Question 14

Subarachnoid space

Answer 14

Space bw pia mater n arachnoid

Question 15

Dermatone

Answer 15

Area of skin supplied by a single spinal nerve

Question 16

Interneurons

Answer 16

In the CNS

Question 17

Reflex arc

Answer 17

Pathway bw stimulus n response. Involves both CNS and PNS.

5 components of typical reflex arc: receptor
Afferent
CNS
Efferent 
Effector

Question 18

Saltatory conduction

Answer 18

During action potential, it goes slowly through the nodes of ranvier n faster through places that hav axons- ie it appears to b jumpin bw the nodes of ranvier