Seasonal rhythms are under the control of ________ secreted by ...

[lracut11]

Seasonal rhythms are under the control of ________ secreted by cells within the ________.
 
  a. melatonin; pineal gland
  b. dopamine; hypothalamus
  c. melanopsin; preoptic hypothalamus
  d. oxytocin; pituitary
  e. melatonin; retina

Question 2

The ticking of a clock cell within the SCN appears to involve
 
  a. feedback loops of intracellular protein production.
  b. the rhythmic opening of sodium channels in the membrane.
  c. interactions between two adjacent clock cells.
  d. the rhythmic opening of calcium channels in the membrane.
  e. the buildup of sodium in the clock cell over time.

[Gabe]

Answer to Question 1

Answer: a. melatonin; pineal gland

Answer to Question 2

Answer: a. feedback loops of intracellular protein production.

[lracut11]

Thanks for the timely response, appreciate it

[amcvicar]

Wow, this really help