The Nervous System

Question 1

2 functions of the NS

Answer 1

1. collect, process and respond to enveronmental information
2. coordinate the working of different organs, glands and cells

Question 2

% of neurons in the brain

Answer 2

~80%

Question 3

2 mai parts of the NS

Answer 3

central nervous system and peripheral nervous system

Question 4

2 parts of the CNS

Answer 4

brain and spinal cord

Question 5

what type of control does the brain have?

Answer 5

contralateral

Question 6

function of the cerebral cortex

Answer 6

higher processing like problem solving, decision-making abd thinking

Question 7

cebral cortex thickness

Answer 7

~3mm

Question 8

brain stem functions

Answer 8

• controls basic functions like sleep and breathing
• connects brain to spinal cord and PNS

Question 9

functions of the spinal cord

Answer 9

controls reflex actions and passes signals between the body and brain via the PNS

Question 10

2 parts of the PNS

Answer 10

autonomic nervous system and somatic nervous system

Question 11

2 divisions of the autonomic NS

Answer 11

sympathetic nervous system and parasympatheic nervous system

Question 12

function of the ANS

Answer 12

sends/receives messages to/from organs and glands and cntrols survival functions by regulating glands, blood vessels, organs

Question 13

does the ANS require conscious attention?

Answer 13

no

Question 14

function of the sympathetic NS

Answer 14

activates physiological arousal to prep for f/f to cope with stress

Question 15

parasympathetic NS function

Answer 15

bring body back to homeostasis and a natural steady state after stress has passes, by balancing body’s processes

Question 16

what body functions are increased by the sympathetic division?

Answer 16

HR, BP, breathing rate, muscle tension

Question 17

function of the SNS

Answer 17

controls skeletal muscles to control voluntary muscle movements

Question 18

2 branches of the SNS

Answer 18

motor branch and sensory branch

Question 19

pathways, controls, control centre

3 differences between the ANS and SNS

Answer 19

1. ANS = only motor pathwyas, SNA = sensory adn motor pathways
2. ANS controls internal organs and glands, SNS controls skeletal muscle and movement
3. ANS control centres in the brain stem, SNS control centre in the motor cortex