Which part of an antibody attaches to an antigen?
A. The hinge region
B. The constant region
C. The heavy chain
D. The variable region
D
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Which pathogen (within the mother) is most likely to be transmitted across the placenta?
A. A multicellular parasite that is present during the first week of pregnancy B. A multicellular parasite that is present during the sixth week of pregnancy C. A blood-borne virus that is present during the first week of pregnancy D. A blood-borne virus that is present during the sixth week of pregnancy
Which statement is most likely to be true about a crenating cell?
a. It is surrounded by a hypotonic ECF. b. It has a lower osmotic pressure than the ECF c. It has a higher concentration of solutes than the ECF. d. It is experiencing a net gain of water. e. It is surrounded by a solution having a solute concentration less than 300 mOsm/L.
A 50-year-old man who is an alcoholic suffers recurrent bouts of pancreatitis that reduce output of pancreatic enzymes after ingestion of a mixed meal
He also presents with diarrhea, and his stools contain high levels of triglycerides but no intact starch. Duodenal aspirates obtained after a meal likewise reveal that starch is being digested appropriately. Assuming the output of all pancreatic enzymes is impaired during pancreatitis, what structure(s) supply an alternate source of enzymatic activity capable of starch digestion? A. Brunner's glands B. brush border of enterocytes C. gallbladder D. parietal cells E. chief cells F. salivary glands
If you had all of your fingers (including the thumb) spread out wide, which muscle or group would bring your thumb toward your first finger?
A. Adductor pollicis B. Dorsal interossei C. Palmar interossei D. Abductor pollicis longus E. Lumbricals