Why does potassium concentration rise in patients with acidosis? What is this called? What effects does it have?
What will be an ideal response?
When pH is low, hydrogen ion levels in the blood are high and also in the interstitial and peritubular fluid. Hydrogen ion competes with potassium ion for the sodium countercurrent exchanger in the tubules. As hydrogen ion secretion rises (which compensates for the acidosis), potassium is retained and hyperkalemia develops. If severe enough, muscle cramps and cardiac arrhythmias result.
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What do the tertiary bronchi serve?
What will be an ideal response?
The nondisjunction event that leads to Jacobs syndrome occurs during
A. spermatogenesis. B. blastocyst formation. C. mitosis. D. oogenesis.
Cranial means "superior."
Indicate whether the statement is true or false.
Cross bridges
a. bind to actin during muscle contraction b. are globular heads made of myosin c. do not bend during muscle contraction d. have characteristics a and b e. have characteristics b and c