Question

1) Reproductive photofractoriness in Syrian hamsters is best characterized by

a) A long day typical behavior but short day typical physioogy

b) the spanteneous re-acrivation of the reproductive system

c) arrhythmic activity rhythms

d) the spantaneous regression of the hamsters testes

2) What is the order the HPA axis stress hromones release?

a) ACTH, CRH, epinephrine

b) corticosterone, CRH, ACTH

C) CRH, ACTH, glucocorticoids

d) ACTH, Glucocorticoids, cortiosterone

3) What photopigment found in certain retinal ganglion cell can encode and transmit light information?

a) melatonin

b)melanin

c) mayonaisin

d) melanopsin

e) none of the above

Answer 1

1) The reproductive photofractoriness in hamster can be well represented by the first statement which is a long day typical behaviour but short day typical physiology. So answer is a.

2)The schematic diagram of the HPA axis involves the hypothalamus realsing corticotrophin realsing hormone or CRH.Anterior pituitary realsing ACTH or adenocorticotrophic hormone and adernal cortex realsing glucocorticoid.So correct answer is c.

3)Melanoposins are a type of photopigments of the light sensitive retinal proteins which can encode and transmit light signal to brain region .So d is right answer.