The countercurrent multiplier is a system by which the
A. nephron loop multiplies the concentration of salts in the interstitial fluid of the kidney medulla.
B. nephron loop dilutes the concentration of solutes in the tubular fluid at its hairpin turn.
C. vasa recta secretes multiple amounts of metabolic wastes against their concentration gradient.
D. vasa recta becomes more concentrated with nitrogenous wastes than the urine.
A
You might also like to view...
The myenteric plexus is found in the ________ of the digestive tract wall.
A. mucosa B. adventitia C. serosa D. submucosa E. muscularis
Considering the mechanisms of innate immunity, which of the following pairs is accurately matched?
A. Complement - slow the spread of viral infections B. Neutrophils - increase in number in response to bacterial infections C. Interferons - assist antibodies in the destruction of pathogens D. Eosinophil - recognize abnormal cells, such as cancer cells
Place the events of the propagation of an action potential in a MYELINATED axon.
What will be an ideal response?
During muscle contraction,
a. the Z lines move farther away from the thick filaments b. the A band becomes narrower c. the H zone becomes narrower or disappears d. the I band remains unchanged e. both b and c occur