Biology Chapter 12: Body Temperature Regulation
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Questions and Answers

What is the primary reason for regulating body temperature within narrow limits?

  • To promote muscle growth
  • To maintain a constant environment for cellular reactions (correct)
  • To prevent changes in blood pressure
  • To ensure efficient digestion

    • Which of the following is NOT a method of heat loss from the body?

  • Conduction from skin to cold objects
  • Cellular respiration (correct)
  • Radiation from the body to the environment
  • Evaporation of sweat

    • Which part of the brain is responsible for regulating body temperature?

  • Cerebellum
  • Cerebrum
  • Hypothalamus (correct)
  • Pituitary gland

    • Which of the following is a way of gaining heat through the environment?

    <p>Conduction from a warm object to the skin (B)</p> Signup and view all the answers

    Which of the following is NOT a method of heat gain in the body?

    <p>Conduction from the body to a cold object (B)</p> Signup and view all the answers

    Which of these conditions is associated with normal core body temperature?

    <p>Heat Exhaustion (D)</p> Signup and view all the answers

    Which of these conditions is characterized by the absence of sweating?

    <p>Heat Stroke (B)</p> Signup and view all the answers

    Which of these conditions is commonly observed in hot and dry environments?

    <p>Heat Stroke (D)</p> Signup and view all the answers

    Which of these conditions involves excessive sweating?

    <p>Heat Exhaustion (A)</p> Signup and view all the answers

    Which of these conditions is more likely to affect children, elders, and premature babies?

    <p>Both Heat Exhaustion and Heat Stroke (B)</p> Signup and view all the answers

    What is the main purpose of homeostasis in organisms?

    <p>To maintain stable internal conditions (A)</p> Signup and view all the answers

    Which component is NOT involved in the continuous exchange of body fluids?

    <p>Nervous tissue (C)</p> Signup and view all the answers

    Where does the gaseous exchange of O2 and CO2 primarily occur?

    <p>Lungs (D)</p> Signup and view all the answers

    What role do the kidneys play in maintaining homeostasis?

    <p>Clear plasma and filter nitrogenous wastes (B)</p> Signup and view all the answers

    Which fluid is primarily responsible for carrying nutrients and oxygen to cells?

    <p>Blood plasma (D)</p> Signup and view all the answers

    What is the typical core body temperature in Celsius?

    <p>37°C (D)</p> Signup and view all the answers

    Which factor contributes to the difference between skin temperature and core body temperature?

    <p>Subcutaneous fat layer (D)</p> Signup and view all the answers

    What does the term homeostasis refer to in the body?

    <p>The constant state of the internal environment (D)</p> Signup and view all the answers

    Which of the following best describes the pH level of blood in homeostasis?

    <p>7.4 (D)</p> Signup and view all the answers

    How does external temperature typically affect core body temperature?

    <p>It has no significant effect on core body temperature. (C)</p> Signup and view all the answers

    Which of the following is NOT a factor that affects the optimal functioning of body cells?

    <p>Blood pressure (D)</p> Signup and view all the answers

    What is the primary goal of homeostasis?

    <p>To maintain a constant internal environment (D)</p> Signup and view all the answers

    What is the term for the mechanisms that maintain a constant internal environment?

    <p>Regulation (A)</p> Signup and view all the answers

    Which of the following is an example of a homeostatic mechanism?

    <p>Shivering when cold (A)</p> Signup and view all the answers

    Why is it important for the body to maintain a stable internal environment?

    <p>All of the above (D)</p> Signup and view all the answers

    What is one method by which heat is gained from the environment?

    <p>Conductive heat transfer (B)</p> Signup and view all the answers

    Which of the following is a voluntary method of heat production?

    <p>Exercise (C)</p> Signup and view all the answers

    Which process is an example of involuntary heat production?

    <p>Shivering (A)</p> Signup and view all the answers

    What role does food intake play in heat gain?

    <p>It provides energy that produces heat. (A)</p> Signup and view all the answers

    How is heat lost from the body according to the described balance?

    <p>Through a combination of methods including radiation (C)</p> Signup and view all the answers

    What is the average body temperature for human beings in degrees Celsius?

    <p>37°C (D)</p> Signup and view all the answers

    Which site is considered the most accurate for measuring body temperature?

    <p>Rectum (D)</p> Signup and view all the answers

    What happens to the human body temperature when exposed to extreme hot or cold environments?

    <p>It remains constant at approximately 37°C (A)</p> Signup and view all the answers

    Which of the following methods is NOT a recommended site for measuring body temperature?

    <p>Ankle (A)</p> Signup and view all the answers

    In human beings, how does the body regulate temperature in varying environmental conditions?

    <p>By maintaining a constant temperature through homeostasis (C)</p> Signup and view all the answers

    What triggers the synthesis and release of pyrogens during a disease?

    <p>Infection by microorganisms (B)</p> Signup and view all the answers

    Which of the following is a benefit of fever in the body?

    <p>Increased production of antibodies (D)</p> Signup and view all the answers

    Which health condition is explicitly mentioned as being associated with fever?

    <p>Typhoid fever (B)</p> Signup and view all the answers

    What effect does fever have on microorganisms?

    <p>Inhibits their activity (C)</p> Signup and view all the answers

    How can fever impact tumor growth?

    <p>Slows the growth of some tumors (B)</p> Signup and view all the answers

    What is the primary physiological response of the body in a hot environment to promote heat loss?

    <p>Sweating (A)</p> Signup and view all the answers

    Which mechanism is primarily used by the body to conserve heat in a cold environment?

    <p>Vasoconstriction of blood vessels (C)</p> Signup and view all the answers

    In response to cold environments, how does the body typically adjust its metabolic activity?

    <p>It increases metabolic rate to generate more heat (D)</p> Signup and view all the answers

    Which of the following actions would help maximize heat loss from the body in a hot environment?

    <p>Using light clothing and stretching (B)</p> Signup and view all the answers

    What is the body's response to increased temperature during hot conditions?

    <p>Increase in respiratory rate (A)</p> Signup and view all the answers

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