Chapter 3: Nervous System and Brain Parts

Question 1

What is the brain behaviour network?

Answer 1

networds of neurons that generate thought

Question 2

What is the central nervous system composed of?

Answer 2

the brain and the spinal cord.

Question 3

What is the peripheral nervous system?

Answer 3

nerves that extend outside of the central nervous system

Question 4

What is the somatic nervous system?

Answer 4

branch of the peripheral nervous system that allows us to sense and respond to environment.

Question 5

What does the somatic nervous system regulate?

Answer 5

posture and movement – voluntary actions

Question 6

what does the autonomic nervous system regulate?

Answer 6

internal state; equilibrium

Question 7

What system does the autonomic nervous system interact with?

Answer 7

the limbic system (emotional and physical states)

Question 8

parasympathetic vs. sympathetic

Answer 8

relaxing, rest and digest andddd arousal (fight or flight)

Question 9

how much energy does the brain use up?

Answer 9

20% (blood and glucose)

Question 10

brain development over time

Answer 10

more recent structures built on top; basic functions and newer systems more complex;

Question 11

3 main parts in hindbrain

Answer 11

cerebellum, pons, medulla

Question 12

What does the cerebellum do?

Answer 12

handles balance, motor coordination, motor learning, executive functioning, language, spatial abilities

Question 13

What does the pons do?

Answer 13

bridge between higher and lower brain areas, helps control vital functions

Question 14

What does the medulla do?

Answer 14

breathing, heart rate, vital functions occur automatically

Question 15

What does the brain stem do?

Answer 15

relay cortex between brain and spinal cord w

Question 16

What does the mid brain do?

Answer 16

handles movement, tracking visual stimuli, auditory reflexes

Question 17

When the Resticular Activating System (RAS) is in ascending/arousal mode, what does it do?

Answer 17

activates the cortex,

increases signal noise ratio

Question 18

when the reticular activating system is descending/ gate keeping, what does it do?

Answer 18

ignores distractions, important for attention.

Can turn off sensory inputs

Question 19

What does the Reticular activating system do in consciousness and sleep?

Answer 19

controls being asleep, can make people go unconscious

Question 20

What happens if the Reticular activating system is damaged?

Answer 20

coma

Question 21

2 different kinds of loss of consciousness

Answer 21

damage to medulla = brain dead

damage to cortex = persistent vegetative state