Phagocytes have general antibody receptors called ________ that bind to any antibody attached to an antigen
A) antigens
B) antigen receptors
C) Fc receptors
D) membrane detectors
Answer: C
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The variables that investigators try to keep the same for both the experimental and the control groups are
(a) independent. (b) controlled. (c) dependent. (d) a and c.
A neuron
a. communicates with other cells via electrical signaling only. b. communicates with other cells via chemical signaling only. c. communicates with other cells via a combination of electrical and chemical signaling. d. is not involved in direct communication with other cells. e. does none of these.
Four of the five answers listed below are related by a common phase of mitosis. Select the exception
a. chromosomes decondense b. spindle microtubules disappear c. nucleolus reappears d. chromosomes separate e. nuclear envelope reforms
Which of the following statements concerning the Rh factor is CORRECT?
A) The Rh antigen is on white blood cells. B) Eighty-five percent of humans are Rh positive. C) Preexisting antibodies occur in 85% of the population. D) Rh antibodies are more abundant than the ABO antibodies. E) Eighty-five percent of the human population is Rh negative.