Which of the following function(s) as the B cell antigen receptor?
A. IgG
B. IgE
C. IgA
D. Monomeric IgM
Answer: D
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Refer to the table above. Because the shark rectal gland functions only when ATP molecules are present, what can you infer about the movement of Na+, K+, and Cl-?
A) Movement of these ions from circulation into the rectal gland is an active process. B) Movement of these ions takes place from a region of higher concentration to a region of lower concentration. C) These ions move into the rectal gland down their concentration gradient. D) The rectal gland is unable to concentrate these ions.
Which of the following is not a major functional class of proteins?
A) trifunctional proteins B) enzymes C) motility proteins D) regulatory proteins E) structural proteins
The type of epithelial cell found in the lining of the stomach, intestinal tract, and uterus is
a. simple cuboidal. b. simple squamous. c. simple columnar. d. stratified. e. stratified columnar
Which of the following is not part of blood plasma?
A. metabolites and wastes B. proteins C. salts and ions D. hemoglobin