In the light-dependent reactions of photosynthesis, how do hydrogen ions get back into the stroma?
a. passive diffusion directly across the thylakoid membrane
b. active transport across the thylakoid membrane
c. facilitated diffusion across the thylakoid membrane
d. active transport through ATP synthase
e. passive diffusion through ATP synthase
ANSWER: e
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the humoral response, some B cells differentiate into plasma cells. What do plasma cells produce in large quantities?
A. agglutinations that are specific for foreign antibodies B. interferons specific for foreign antigens C. immunoglobulins specific for foreign antigens D. antigens specific for foreign antibodies E. macrophages specific for foreign antibodies
Olfactory receptors are located in which one of the following?
A) taste buds B) muscles C) upper part of nasal passages D) skin surrounding nasal openings E) upper regions of mouth
What are the three components of a nephron?
a. renal pelvis, major calyx, minor calyx b. afferent arteriole, glomerulus, efferent arteriole c. renal corpuscle, renal tubule, and capillaries d. ureter, renal fascia, capsule
Which of the following is mismatched?
a. some free nerve endings; itching b. some free nerve endings; temperatures above and below those of the normal body core c. bulbs of Krause; thermoreception d. Meissner’s corpuscles; rapid-frequency vibrations e. Ruffini endings; steady touch and thermoreception