The cytoskeleton consists of
A. ribosomes, the nucleus, and the Golgi apparatus.
B. microfilaments, mitochondria, and lipochromes.
C. microtubules, actin filaments, and intermediate filaments.
D. actin filaments, mitochondria, and intermediate filaments.
E. lipochromes, microfilaments, and microtubules.
C
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What will happen if a normal cell is placed in a hyperosmotic solution?
A. It will stay the same size. B. It will swell in size. C. It may swell, shrink, or stay the same size, depending upon the concentration of penetrating and nonpenetrating solutes in the solution. D. It will shrink in size.
The constant region of the antibody joins heavy and light chains to form an antigen-binding site specifically made to fit an antigen
Indicate whether the statement is true or false
The suprachiasmatic nuclei ________.
A. contain "clock cells" that have patterns which repeat about every twenty-four hours B. control melatonin secretion from the pineal gland C. are located in the anterior hypothalamus D. All of the choices are correct.
Metabolically active tissues have which of the following sets of conditions that shift the oxyhemoglobin dissociation curve to the right?
A. ? PO2, ? PCO2, ? temperature, ? BPG B. ? PO2, ? PCO2, ? temperature, ? BPG C. ? PO2, ? PCO2, ? temperature, ? BPG D. ? PO2, ? PCO2, ? temperature, ? BPG