Which of the following statement(s) is (are) true of the α subunit of a G protein?

a. It physically associates with the receptor.              

b. It binds GDP.

c. It binds GTP.                     

d. It is a transmembrane protein.

#Question id: 11946

#Unit 7. System Physiology – Animal

A 3-week-old infant is brought to the emergency room in a comatose condition. The history reveals that her parents have been feeding her concentrated, undiluted formula for 5 days. (Infant formula preparations are often sold in concentrated forms that must be properly diluted with water before feeding.) The infant’s plasma osmolality is 352 mOsm/L (normal is 280 to 300 mOsm/L), and the osmolality of the urine is 497 mOsm/L. What is the explanation for the hyperosmotic condition of the plasma?

#Question id: 11947

#Unit 7. System Physiology – Animal

Why is milk produced only after delivery, not before?

#Question id: 11948

#Unit 7. System Physiology – Animal

Which of the following increases the rate of excretion of calcium ions by the kidney?

#Question id: 11949

#Unit 7. System Physiology – Animal

If a woman has a tumor secreting large amounts of estrogen from the adrenal gland, which of the following will occur?

#Question id: 11950

#Unit 7. System Physiology – Animal

In a normal young man, what is the maximum pressure that can be achieved within the corpora cavernosa during a sexual experience?

#Question id: 11951

#Unit 7. System Physiology – Animal

Very early in embryonic development, testosterone is formed within the male embryo. What is the function of this hormone at this stage of development?