Which of the following would not be affected by the absence of microtubules?
A. Cell division
B. Cell movement
C. The arrangement of organelles
D. DNA replication
E. Movement of molecules within the cell
D. DNA replication
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Which of the following statements regarding lipid digestion and absorption is TRUE?
A. The presence of fatty acids in the stomach stimulates the secretion of secretin, which inhibits motility of the large intestine. B. The presence of fatty acids in the duodenum stimulates the secretion of CCK, which in turn stimulates secretion of pancreatic enzymes. C. The presence of fatty acids in the duodenum stimulates the secretion of secretin, which in turn stimulates contraction of the gallbladder. D. The presence of fatty acids in the duodenum stimulates the secretion of gastrin, which in turn stimulates bile synthesis in the gallbladder. E. The presence of fatty acids in the duodenum stimulates emptying of the stomach.
Which of the following concerning Class I MHC proteins is false?
A) bind complement B) allow the body to differentiate its own antigens from foreign antigens C) function in antigen presentation D) display abnormal peptides on the plasma membrane E) are found on all nucleated cells
The right atrioventricular valve is also called the
a. tricuspid valve. b. left atrioventricular valve. c. bicuspid valve. d. mitral valve.
Which bone contains the sella turcica? What structure is found within the sella turcica depression?
A) sphenoid; hypothalamus B) sphenoid; pituitary gland C) ethmoid; hypothalamus D) ethmoid; pituitary gland E) palatine; epithalamus