If 20% of the air is composed of O2, the partial pressure of oxygen at an altitude of 20,000 feet where atmospheric pressure is 350 mm Hg is
a. 20 mm Hg
b. 760 mm Hg
c. 70 mm Hg
d. 350 mm Hg
e. 152 mm Hg
C
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This figure shows an example of regulation of hormone secretion by a negative feedback loop. The large box labeled 1 represents the initial stimulus. What endocrine glands are indicated by the letters d and e?
A. d = hypothalamus, e = posterior pituitary B. d = thalamus, e = anterior pituitary C. d = hypothalamus, e = anterior pituitary D. d = hypothalamus, e = thyroid gland E. d = thalamus, e = posterior pituitary
Nonkeratinized cells exfoliate from the surface of the skin.
Answer the following statement true (T) or false (F)
Dietary amino acids in a meal that are in excess of the body's need to make protein are:
A. converted to glucose in the liver. B. converted to fatty acids in the liver. C. excreted without being absorbed. D. converted to fatty acids in adipose cells. E. burned for fuel by cells of the nervous system.
Which of the following is the healthiest ratio of triglycerides?
A) High HDL: low LDL B) High chylomicron: low LDL C) High LDL: low HDL D) High SFA: low HDL E) High LDL: low chylomicron