An opsonin is a __________________
A.
subclass of immunoglobulin.
B.
compound released by leukocytes that aids in the immune response to an antigen.
C.
substance that promotes fever.
D.
compound released by leukocytes that inhibits the immune response to an antigen.
E.
substance that makes antigens more susceptible to phagocytosis.
E
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ADH level in nephrons regulates water output by causing
A) the distal convoluted tubule and collecting duct to reabsorb more or less sodium ions. B) the distal convoluted tubule and collecting duct to reabsorb more or less water. C) the glomerulus and proximal convoluted tubule to filter less or more water. D) the glomerular capsule and nephron loop to absorb more or less water.
The substance that serves as a liquid shock absorber protecting the brain and spinal cord is called ________________________.?
Fill in the blank(s) with correct word
When sexual behavior is examined across cultures, the type of sexual activity that is the most strictly forbidden is:
A. homosexuality. B. incest. C. extramarital sex. D. premarital sex
Which of the following is not considered an accessory structure of the eye?
A) Conjunctiva B) Palpebra C) Superior oblique D) Lacrimal apparatus E) Cornea