9. Connective tissue contains fibroblasts that are responsible for:
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A) providing a fibrous framework for capillaries.
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B) synthesis of collagen, elastin, and reticular fibers.
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, C) forming tendons and the fascia that covers muscles.
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D) filling spaces between tissues to keep organs in place.
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10. Although all muscle tissue cells have some similarities, smooth muscle
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(also known as involuntary muscle) differs by:
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A) having dense bodies attached to actin filaments.
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B) containing sarcomeres between Z lines and M bands.
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C) having rapid contractions and abundant cross-striations.
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D) contracting in response to increased intracellular calcium.
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11. Which of the following aspects of the function of the nucleus is
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performed by ribosomal RNA (rRNA)?
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A) Copying and carrying DNA instructions for protein synthesis
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B) Carrying amino acids to the site of protein synthesis
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C) Providing the site where protein synthesis occurs
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D) Regulating and controlling protein synthesis ch ch ch ch
12. Breakdown and removal of foreign substances and worn-out cell parts
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are performed by which of the following organelles?
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A) Lysosomes
B) Golgi apparatus ch
C) Ribosomes
D) Endoplasmic reticulum (ER) ch ch
13. Impairment in the function of peroxisomes would result in:
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A) inadequate sites for protein synthesis. ch ch ch ch
B) an inability to transport cellular products across the cell membrane.
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C) insufficient energy production within a cell. ch ch ch ch ch
D) accumulation of free radicals in the cytoplasm. ch ch ch ch ch ch
14. After several months of trying to conceive, a couple is undergoing
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fertility testing. Semen analysis indicates that the mans sperm have
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decreased motility, a finding that is thought to underlie the couples
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inability to become pregnant.
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