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1 | |
Given what you know about the hierarchy of chemical organization, answer the following question. If Los Angeles was a molecule, Orange County was a cell, and California was a tissue, what would the United States be? |
| | A) | a sister cell |
| | B) | an organ system |
| | C) | an organ |
| | D) | an organism |
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2 | |
Which organ system is primarily responsible for coordinating, regulating, and integrating the various activities of the body? |
| | A) | nervous |
| | B) | endocrine |
| | C) | muscular |
| | D) | respiratory |
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3 | |
Which of the following statements best describes endocrine glands? |
| | A) | Endocrine glands are ductless glands that secrete hormones. |
| | B) | Endocrine glands are ductless glands that secrete sweat, saliva, and digestive enzymes. |
| | C) | Endocrine glands secrete hormones through a duct. |
| | D) | Endocrine glands secrete sweat, saliva, and digestive enzymes through a duct. |
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4 | |
Which of the following is not considered a connective tissue? |
| | A) | blood |
| | B) | muscle |
| | C) | adipose tissue |
| | D) | cartilage |
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5 | |
Which of the following statements about nerve tissue is false? |
| | A) | Neurons transmit sensory information to the brain. |
| | B) | Both neurons and neuroglia are present in the CNS and PNS. |
| | C) | Neurons conduct electrical impulses. |
| | D) | All types of cells in nerve tissue conduct electrical impulses. |
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6 | |
Exoskeletons provide excellent protection to internal organs. However, animals that utilize exoskeletons are usually relatively small. Why? |
| | A) | These animals are only able to produce a limited amount of chitin. |
| | B) | Exoskeletons are not living tissue, and therefore they cannot grow. |
| | C) | A large exoskeleton would be too heavy to move. |
| | D) | During molting, these animals are especially vulnerable to predators and therefore do no usually live long enough to grow bigger. |
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7 | |
Which of the following statements best describes the sliding filament mechanism of muscle contraction? |
| | A) | Actin and myosin filaments do not shorten, but rather, slide past each other. |
| | B) | Actin and myosin filaments shorten and slide past each other. |
| | C) | As they slide past each other, actin filaments shorten, while myosin filaments do not shorten. |
| | D) | As they slide past each other, myosin filaments shorten, while actin filaments do not shorten. |
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8 | |
What is the role of Ca++ in muscle contraction? |
| | A) | It binds to tropomyosin, enabling troponin to move and reveal binding sites for cross-bridges. |
| | B) | It binds to troponin, enabling tropomyosin to move and reveal binding sites for cross-bridges. |
| | C) | It binds to tropomyosin, enabling troponin to release ATP. |
| | D) | It binds to troponin, enabling tropomyosin to release ATP. |
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9 | |
Motor neurons stimulate muscle contraction via the release of |
| | A) | Ca++. |
| | B) | ATP. |
| | C) | acetylcholine. |
| | D) | hormones. |
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10 | |
Which of the following statements about muscle metabolism is false? |
| | A) | Skeletal muscles at rest obtain most of their energy from muscle glycogen and blood glucose. |
| | B) | ATP can be quickly obtained by combining ADP with phosphate derived from creatine phosphate. |
| | C) | Exercise intensity is related to the maximum rate of oxygen consumption. |
| | D) | ATP is required for the pumping of the Ca++ back into the sarcoplasmic reticulum. |
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