the nervous and endocrine system

Question 1

nervous system

Answer 1

consists of the central nervous system and the peripheral nervous system

Question 2

CNS

Answer 2

consists of the brain and the spinal cord

Question 3

PNS

Answer 3

sends information to the CNS from the outside world, and transmits messages from the CNS to muscles and glands

Question 4

SNS (somatic nervous system)

Answer 4

transmits information from receptor cells to the CNS

Question 5

ANS (autonomic nervous system)

Answer 5

transmits information to and from internal bodily organs
operates involuntarily
contains the sympathetic and parasympathetic

Question 6

endocrine system

Answer 6

instructs glands to release hormones directly into the bloodstream

Question 7

glands

Answer 7

an organ in the body that synthesises substances such as hormones

Question 8

what are the main endocrine glands?

Answer 8

hypothalamus, pituitary, thyroid, adrenals, pancreas, ovaries, testes

Question 9

fight or flight response

Answer 9

the way the body responds when stressed

Question 10

how does the fight or flight response work?

Answer 10

• when the stressor is perceived, the hypothalamus triggers activity in the sympathetic branch
• ANS changes from normal resting state to physiologically aroused
• adrenaline is released fromthe adrenal medulla which causes heart beat to increase, increased sweat, dilated pupils, inhibits digestion
• once threat is passed, the parasympathetic branch reverses the changes = “rest and digest”