sympathetic nervous response

Question 1

describe the sympathetic NS

Answer 1

• part of the autonomic nervous system
• not under conscious control
• sends impulses through motor neurones to effectors in a rapid response

Question 2

describe the effect on heart rate

Answer 2

• increases
• contracts with more force so blood is pumped faster

Question 3

describe the effect on muscles

Answer 3

• bronchiole muscles relax so airways widen
• intercostal muscles and diaphragm contract faster with more strength so breathing rate increases
• muscles supplying skin/gut capillaries vasoconstriction to less essential areas but vasodilator for supplying heart/lungs

Question 4

describe the effect on glucose levels

Answer 4

glycogen is converted to glucose for respiration

Question 5

what is the adrenal cortical system?

Answer 5

a cascade of hormone release

Question 6

describe the adrenal cortical cascade

Answer 6

• hypothalamus releases CRF
• pituitary gland is stimulated
• ACTH hormone is released