Polycystic ovarian syndrome (PCOS) is a disorder in which a female produces abnormally high levels of androgens (particularly testosterone), which have various adverse effects on the female body. Which of the following describes a symptom that would be caused by high blood androgens level in a female?
A. Excessive breast development (gynecomastia)
B. Rapid, excessive ovulation
C. Thickened endometrium
D. Abnormal growth of hair on the face and back
Answer: D
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If a 10% sucrose solution is separated from a 20% sucrose solution by a membrane impermeable to sucrose, in which direction will net movement of water occur?
A) from the 20% sucrose solution to the 10% sucrose solution only B) from the 10% sucrose solution to the 20% sucrose solution and from the 20% sucrose solution to the 10% sucrose solution C) There will be no net movement of water in this case. D) from the 10% sucrose solution to the 20% sucrose solution only E) None of the answers are correct.
Which is not true about blood pressure?
a. It is maximal during ventricular systole. b. It decreases as blood moves farther away from the heart. c. It increases with increasing resistance. d. It decreases with increasing vessel diameter. e. It can be increased by direct parasympathetic activity.
A pH of 4 is ____ times as acidic as a pH of 7
a. 10 b. 100 c. 1,000 d. 10,000 e. 100,000
Which of the following conditions must be met if diffusion across a membrane is to occur?
A) A concentration gradient must be present, and the membrane can't be permeable to the substance being transported. B) A concentration gradient must be present, and the membrane must be permeable to the substance that is to be transported. C) The membrane must be permeable to the substance that is to be transported. D) A concentration gradient must be present.