Which of the following can play a role in buffering the pH of urine?
A. ammonia
B. bicarbonate ions
C. phosphate ions
D. ammonia and bicarbonate ions
E. ammonia, bicarbonate ions and phosphate ions
E
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Covalent bonds:
a. dissociate in water b. are formed when electrons are shared between atoms c. are formed by atoms of opposite charge d. both A and C above
During inspiration:
a. the diaphragm contracts and moves up into the thoracic cavity b. the chest cavity expands c. the pressure in the thoracic cavity increases d. all of the above
What part of the vulva contains sebaceous glands?
A) labia minora B) mons pubis C) clitoris D) vestibule
Which of the following is NOT true of accommodation?
A. It is accomplished by a reflex in the iris. B. When a person focuses on a close object, the lens becomes more spherical. C. When accommodation occurs, tension is released on the suspensory ligaments holding the lens. D. It refers to a change in the shape of the lens, as a person focuses on a near object. E. All of these are true of accommodation.