Homeostasis exists if concentrations of water, nutrients, and oxygen in the body are balanced and heat and pressure ________.
A. remain within certain limited ranges
B. fluctuate greatly between very high and low values
C. increase when the body is stressed
D. decrease steadily
Answer: A
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Aqueous humor is produced at the ciliary body and returns to the circulation after it drains into the ________.
Fill in the blank(s) with the appropriate word(s).
Hemodialysis involves
A) an artificial kidney. B) a bone marrow transplant. C) an artificial liver. D) a kidney transplant.
A drug known as a beta-blocker should primarily affect:
A) bronchodilation. B) dilation of the pupils. C) heart rate. D) sweating.
A 30-year-old woman presents with 3 days of generalized weakness, dizziness, and excessive urination. She is conscious but restless, and she tells you that she is extremely thirsty. Her blood pressure is 96/66 mm Hg, her pulse is 110 beats/min and full, and her respirations are increased and somewhat deep. On the basis of this patient's clinical presentation, she will MOST likely require oxygen and:
A) 25 g of 50% dextrose. B) in-hospital antibiotics. C) 0.5 to 1 mg of glucagon. D) crystalloid fluid hydration.