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APHY 101 MIDTERM EXAM LATEST
QUESTIONS AND CORRECT ANSWER S IVY
TECH COMMUNITY COLLEGE INDIANAPOLIS
Substance that releases H+; decreases pH
a) Base b) Acid c) Buffer d) Salt
Correct answer: b) Acid
Explanation: Acids release hydrogen ions (H+), lowering pH.
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Which serous membrane would be found in the abdominopelvic cavity?
a) Pericardial membrane b) Pleural membrane c) Peritoneal
membrane
Correct answer: c) Peritoneal membrane
Explanation: The peritoneal membrane lines the abdominopelvic
cavity.
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Substance that combines with H+ to remove it from solution; increases pH
a) Base b) Acid c) Buffer d) Salt
Correct answer: a) Base
Explanation: Bases accept H+, raising pH.
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Substance that resists a change in pH
a) Base b) Acid c) Buffer d) Salt
Correct answer: c) Buffer
Explanation: Buffers stabilize pH by neutralizing added acids or
bases.
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Product (along with water) of a reaction between an acid and a base
a) Base b) Acid c) Buffer d) Salt
Correct answer: d) Salt
Explanation: Acid-base neutralization produces a salt and water.
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Which of the following are typically required to maintain a stable internal environment?
a) Positive Feedback Mechanisms b) Negative Feedback
Mechanisms c) An unstable outside environment d) Decreased atmospheric pressure
Correct answer: b) Negative Feedback Mechanisms
Explanation: Negative feedback maintains homeostasis by
counteracting changes.
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Which level of protein structure refers to the twisting or pleating of the polypeptide chain?
a) Quaternary structure b) Primary structure c) Secondary
structure d) Tertiary structure
Correct answer: c) Secondary structure
Explanation: Secondary structure includes alpha helices and beta
pleats.
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The most abundant chemical in the body; transports and regulates body temperature
a) Food b) Heat c) Pressure d) Water
Correct answer: d) Water
Explanation: Water, about 60% of body mass, regulates
temperature and transports substances.
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Substances that provide the body with necessary chemicals; used for energy or building
a) Food b) Heat c) Pressure d) Water
Correct answer: a) Food
Explanation: Food supplies nutrients for energy and growth.
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A form of energy released during metabolism