This chemical produced in the retina is important for the light-dark cycle of circadian rhythms:
a. melatonin
b. melanocortin
c. melanopsin
d. melanin
e. none of the above
C
You might also like to view...
Which layer of the uterine wall is sloughed off during menstruation?
A. Perimetrium B. Epimetrium C. Myometrium D. Basal layer of endometrium E. Functional layer of endometrium
The first step in oogenesis is:
A) a corpus luteum becomes a corpus albicans. B) a primary oocyte divides to form a secondary oocyte and a first polar body. C) a follicle becomes a corpus luteum. D) a secondary oocyte divides to form a polar body and an egg cell.
The testes are the male gametes.
Answer the following statement true (T) or false (F)
This figure shows an anterior view of the spinal cord and meninges. What structure does number 1 indicate?
A. Posterior root B. Posterior root ganglion C. Anterior root ganglion D. Anterior root E. Gray commissure