Describe how testosterone concentrations are regulated by negative feedback mechanisms. What will be an ideal response?
Concepts to Consider: GnRH is released from the hypothalamus and stimulates the pituitary to
secrete FSH and LH. These, in turn, stimulate testosterone secretion. The presence of testosterone then
inhibits secretion of GnRH from the hypothalamus. It also affects the pituitary gland by blocking the
actions of GnRH on FSH and LH synthesis and release.
You might also like to view...
When arabinose is present in the environment, the AraC protein acts as a(n) ________ for the E. coli ara operon.
Fill in the blank(s) with the appropriate word(s).
The human microbiome is best described as:
A. bacteria associated with the body. B. bacteria and fungi associated with the body. C. bacteria, fungi, and archaea associated with the body. D. viruses that have integrated their genomes into the human genome. E. bacteria, fungi, and archaea that have integrated their genomes into the human genome.
Which of the following is least likely to be part of a cell membrane?
A) proteoglycans B) phospholipids C) glycoproteins D) transport proteins E) enzymes
The arsenic compound that proved highly effective in treating syphilis was called
A. penicillin. B. sulfa. C. erythromycin. D. Salvarsan.