A(n) ________ acid is an acid that can leave solution and enter the atmosphere
A) fixed
B) organic
C) volatile
D) weak
E) hydrophobic
Answer: C
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Suppressor T cells act to
A) suppress antigens. B) erase memory T cells. C) limit antigen proliferation. D) inhibit T and B cell activities. E) produce antibodies involved in autoimmunity.
In the brain ADH _______ the thirst center, and in the kidneys ADH causes an increase in water __________
A. stimulates; secretion B. stimulates; reabsorption C. inhibits; secretion D. inhibits; reabsorption
Which of the following statements is true of both bone and cartilage?
a. They both contain more intercellular matrix than cells. b. Both bone and cartilage cells are supplied with food and oxygen through canaliculi. c. Both bone and cartilage cells are located in lacunae. d. Both A and C are true.
The kidneys are stimulated to produce renin ________
A) when the pH of the urine decreases B) when the specific gravity of urine rises above 1.10 C) when the peritubular capillaries are dilated D) by a decrease in the blood pressure