Animal Response

Question 1

Compare and contrast the sympathetic and parasympathetic NS

Answer 1

Sym - excite - many neurones out of CNS

Para - depress - few neurones out of CNS

Question 2

How does the difference in number of neurones going out of CNS (for Autonomic NS) result in position of neurones “relay station”?

Answer 2

Sympathetic has many so need to meet near the CNS
Parasympathetic has few so need to split further from CNS

Relay stations are ganglions

P(ara) is closer to E(ffector) than S(symp)

Question 3

Why are thyroxine and glucocorticoids important in fight or flight response

Answer 3

Thyroxine increases metabolic rate and sensitivity to adrenaline
Glucocorticoids regulate metabolism of carbohydrates

Question 4

What hormones are released by the pituitary gland during fight or flight response?

Answer 4

ACTH due to Corticotrohin Releasing Homorones

TSH due to Thyroxine releasing hormones

Question 5

Describe the structure of a sarcomeres

Answer 5

Two ends are Z lines
Actin moves out from Z lines
Myosin in the middle

HIA
H-zone = no actin
I - band = only actin
A - band = all myosin