Chapter 6

Question 1

2 types of nervous system

Answer 1

1. Central nervous system ( CNS)
2. Peripheral Nervous System ( PNS)

Question 2

Central nervous system

Answer 2

1. Brain
2. Spinal Cord

Cranial nerves

Question 3

Peripheral Nervous System

Answer 3

1. afferent division
2. efferent division

Question 4

Afferent division of PNS(sensory (input)

Answer 4

1. Somatic Sensory ( senses)
2. Visceral sensory (Organs)
3. Special sensory ( vision, hearing, taste, in your head)

Question 5

Efferent division of PNS ( Output/motor)

Answer 5

1. somatic motor: alpha motor neuron
2. Autonomic Motor: vital organs (heart, lungs) , digestive system
   Sympathetic: fight or flight
   Parasympathetic : rest /relax
   Enteric ( digestive system)

Actions response to input

Question 6

Cells of nervous system

Answer 6

Neurons : information transfer
conduct electrochemical impulses
respond to stimuli
Neuroglial cells: Both CNS/PNS
supportive functions

Question 7

Neuron parts

Answer 7

Cell body
Dendrites
Axon hillock ( trigger zone)
Axon collaterals
axon terminal

Question 8

3 different classification of Neurons

Answer 8

1. Multipolar (trigger zone between cell body and axon terminal
2. Bipolar ( special case , dendrites, common branch, cell body, then trigger zone
3. Unipolar : somato sensory: dendrites trigger zone then axon the cell body then axon terminal .

Question 9

Neuron

Answer 9

Single nerve cell

Question 10

Nerve

Answer 10

Group of axons plus connective tissue wrapping and blood vessels

Question 11

3 layers of connective tissue of nerve

Answer 11

Epineurium
Perineurium
Endoneurium

Question 12

Different types of Neuroglial cells

Answer 12

1. Astrocytes
2. microglia
3. Ependymal Cells
4. Oligodendrocytes
   5.Schwann cells
   6.Satellite cells

Question 13

Astrocytes

Answer 13

Important role in development
signal neuron where to go
structural support

Question 14

Microglia

Answer 14

Part of immune system
clean up cellular debrief
infection/injury in nervous system

Question 15

ependymal cells

Answer 15

Help produce ceribral spinal fluid

Question 16

Origodendrocytes

Answer 16

Provide myelin wrapping
insulation of axon
improve conduction

Question 17

Schwann Cells

Answer 17

Prevent leakage of signal
role of myelin
Lightly cup unmyelinated axon

Question 18

Satellite cells

Answer 18

?

Question 19

Myelin

Answer 19

formed by neuroglial cells ( oligodendrocytes ( CNS)
Schwann cells (PNS)
Made of lipid and protein
provide electrical insulation

Question 20

Node of Ranvier

Answer 20

The empty spaces between Myelin sheath