The Nervous Systen Mod 7

Question 1

What are the 2 main divisions of the nervous system? And what do they contain?

Answer 1

1. The central nervous system: brain and spinal cord

2. Peripheral nervous system: nerves that go out from the central nervous system

Question 2

What further divides the peripheral nervous system into 2 categories?

Answer 2

1. Autonomic nervous system: regulates the bodies involuntary processes
2. Somatic nervous system: regulates the bodies voluntary control

Question 3

What are the 2 divisions of the autonomic nervous system?

Answer 3

Sympathetic: fight or flight response involuntary
Parasympathetic: rest and digest sympathizes stress

Question 4

What are the 3 parts of a neutron?

Answer 4

Dendrites, axon and cell body

Question 5

What are the 3 types of neutrons and what are their functions?

Answer 5

1. Sensory (afferent) receives impulse and sends to the brain ex. touching something cold
2. Motor (efferent) causes an action (effect) ex. moving your hand away
3. Interneurons: the (middle man) and helps the other 2 neuroma communicate

Question 6

What are the 3 nerve wrappings that cover the nerve?

Answer 6

1. Endoneurium: surrounds individual fibres (inside)
2. Perineurium: surrounds a group of nerve fibres
3. Epineurium: surrounds the entire nerve

Question 7

What is the differences in gray and white matter?

Answer 7

White: contains fat
Gray: contains no protection

Question 8

What is a synapse?

Answer 8

The place where impulses are transmitted from one neutron to another

Question 9

What are 3 structures that make up a synapse?

Answer 9

Synaptic knob, cleft and plasma membrane

Question 10

What are the 4 divisions of the brain?

Answer 10

Brain stem, cerebellum, diencephalon, cerebrum