Choose the correct statement 

a. The nucleosome is a disc with DNA organized into 22/3 turns around the core .

b. The nucleosome is a disc with DNA organized into 12/3 turns around the surface.

c. The nucleosome is a disc of 11 nm diameter and 6 nm height.

d. The nucleosome is a cylinder of 6 nm diameter and 11 nm height.

#Question id: 11785

#Unit 7. System Physiology – Animal

A man is taking a number of medications, one of which appears to be interfering with the emission phase of the sexual act. Which of the following medications could cause this problem?

#Question id: 11786

#Unit 7. System Physiology – Animal

In controlling aldosterone secretion, angiotensin II acts on which of the following structures?

#Question id: 11787

#Unit 7. System Physiology – Animal

Giving prostaglandin E2 (PGE2) to a pregnant woman may result in an abortion. What is the best explanation for this finding?

#Question id: 11788

#Unit 7. System Physiology – Animal

During the first few years after menopause, follicle-stimulating hormone (FSH) levels are normally extremely high. A 56-year-old woman completed menopause 3 years ago. However, she is found to have low levels of FSH in her blood. Which of the following is the best explanation for this finding?

#Question id: 11796

#Unit 7. System Physiology – Animal

Which of the following hormones is largely unbound to plasma proteins?

#Question id: 11946

#Unit 7. System Physiology – Animal

A 3-week-old infant is brought to the emergency room in a comatose condition. The history reveals that her parents have been feeding her concentrated, undiluted formula for 5 days. (Infant formula preparations are often sold in concentrated forms that must be properly diluted with water before feeding.) The infant’s plasma osmolality is 352 mOsm/L (normal is 280 to 300 mOsm/L), and the osmolality of the urine is 497 mOsm/L. What is the explanation for the hyperosmotic condition of the plasma?