The lungs are protected from microorganisms by
A. the mucociliary blanket.
B. phagocytic action of alveolar macrophages.
C. lysozyme in mucus.
D. All of the choices are correct.
Answer: D
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In which of the following structures does fertilization typically take place?
A. fallopian tubes B. ovaries C. uterus D. cervix E. vagina
For several weeks, someone at the lab has been stealing your lunch while you’ve been tied up in meetings or tending experiments that required close attention. Tired of spending your afternoons with a rumbling stomach, you decide to make life uncomfortable for the thief, so today you’ve seasoned your sandwich with your favorite hot sauce, made with Carolina Reaper peppers. Your mouth burns just remembering the last time you tasted a drop. What type of learning behavior are you hoping your sandwich thief will experience today?
a. operant conditioning b. cognitive learning c. classical conditioning d. habituation
Which of the following is true concerning a lysogenic viral replication cycle?
a. During lysogeny, the viral DNA is present as a circular plasmid. b. During lysogeny, the viral genome integrates into the host DNA, becoming a physical part of the chromosome. c. Once the lysogenic portion of the cycle has begun, virus is never produced again. d. Lysogenic infections are similar to persistent infections, in that virus is constantly produced.
Antibody molecules circulate in lymph, blood, and tissue fluids.
Answer the following statement true (T) or false (F)