In the phospholipase C mechanism, most of the increased intracellular calcium comes from ________.
A. within the plasma membrane
B. extracellular fluid
C. the endoplasmic reticulum
D. outside the cell
Answer: C
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The whole deltoid muscle ________ the humerus
A) abducts B) flexes C) pronates D) rotates E) inverts
To reduce brain swelling by pulling water out of brain cells, a substance can be injected intravenously to increase the osmotic pressure of interstitial fluid. Which of the following properties must this substance lack in order to be effective?
A) permeable to capillary endothelium B) nontoxic to neurons C) permeable to brain plasma membranes D) impermeable to brain plasma membranes E) soluble in water
Air entering the potential space of the pleural cavity is called
A) pulmonary ventilation. B) pneumothorax. C) internal respiration. D) pneumonia.
Renal failure would likely lead to
A. volume excess. B. hypotonicity. C. volume depletion. D. hypertonic ascites.