The ascending limb of the loop of Henle is where
a. NaCl passively leaves the tubular fluid down its concentration gradient
b. NaCl is actively transported into the interstitial fluid, leaving water behind because the tubular cells are not permeable to water
c. K+ is secreted
d. aldosterone stimulates Na+ reabsorption
e. none of the above occur
B
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Answer the following statement true (T) or false (F)
Which structures in the figure together secrete liquid components of semen?
a) B, C, G b) B, C, F c) B, D, I d) B, C, L e) B, H, L
Compare and contrast chemical energy and radiant energy. Into which broad category of energy (kinetic or potential) does each fit? What are two examples of each type of energy that relate to human physiology?
What will be an ideal response?
If you wanted to pick up something heavier than your pencil (such as your book), you would need to have a stronger muscle contraction. In what way might you accomplish this?
a. stimulate more motor units b. decrease the frequency of stimulation to allow a more prolonged contraction to occur c. decrease the refractory period d. block acetylcholinesterase at the neuromuscular junction to allow acetylcholine to function longer e. none of these answers.