A primary reason that the kidneys have one of the highest metabolic rates of all body organs is that _____
A) they have membranes of varying permeability to water
B) they operate an extensive set of active-transport ion pumps
C) they are the body's only means of shedding excess nutrients
D) they have an abundance of myogenic smooth muscle
B
You might also like to view...
The production of ATP in the mitochondria requires ____
a. ribosomes b. oxygen c. carbon dioxide d. vesicles e. DNA
Four of the following are chelicerates. Which one is the exception?
A. Tick B. Mosquito C. Spider D. Horseshoe crab E. Scorpion
The complement cascade and its by-products contribute to
A) attracting phagocytes to sites of infection. B) triggering inflammation. C) triggering release of interferons. D) triggering inflammation and release of interferons. E) both triggering inflammation and attracting phagocytes to sites of infection.
Membrane lipids are capable of many different types of movement. Which of these does not occur spontaneously in biological membranes?
(a) switching between lipid layers (b) lateral movement (c) rotation (d) flexing of hydrocarbon chains