When explaining factors that influence the number of receptors present on target cells, the instructor will likely mention: Select all that apply
A) The role antibodies may have on receptor proteins.
B) A decreased hormone level may produce increased receptor numbers.
C) A sustained excess hormone level brings about a decrease in receptor numbers.
D) How any given hormone can change its affinity to supply a need to all cells.
E) It may take days to weeks before a hormone can react to target cells.
Ans: A, B, C
Feedback:
Target cell response varies with the number and affinity of the relevant receptors. The number of hormone receptors on a cell may be altered for any of several reasons. Antibodies may destroy or block the receptor proteins. Increased or decreased hormone levels often induce changes in the activity of the genes that regulate receptor synthesis. For example, decreased hormone levels often produce an increase in receptor numbers by means of a process called up-regulation; this increases the sensitivity of the body to existing hormone levels. Likewise, sustained levels of excess hormone often bring about a decrease in receptor numbers by down-regulation, producing a decrease in hormone sensitivity.
You might also like to view...
Break down the medical word into its word parts, and give the meaning of each word part. Then, give the definition of the medical word.
Aphonia Definition: Prefix and definition: Suffix and definition:
A client is extremely anxious about his impending surgery. Which of the following measures should the nurse implement to create an atmosphere for effective use of relaxation techniques?
A) A quiet, dim environment B) A soothing, warm foot soak C) Gentle muscle stroking D) Repetitive questioning
Explain how a vasectomy would prevent the male from impregnating a female
What will be an ideal response?
Workers in every field respond the same to occupational demands.?
Indicate whether the statement is true or false