Anatomy & Physiology: Homeostasis

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Anatomy & Physiology: Homeostasis - Quiz

A quiz testing knowledge on Homestasis, Negative/Positive Feedback, etc.


Questions and Answers
  • 1. 

    The focus of anatomy is

    Explanation
    The focus of anatomy is the study of structure. This field of science is concerned with understanding the organization and arrangement of different parts of living organisms, such as cells, tissues, organs, and systems. By examining the structure of the human body or other organisms, anatomists can gain insights into how they function and interact. Through the study of anatomy, scientists and medical professionals can better understand the complexities of the body and develop treatments and interventions to maintain or restore its structure and function.

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  • 2. 

    The focus of physiology is

    Explanation
    Physiology is the branch of biology that deals with the functions and processes of living organisms. It focuses on understanding how different systems and organs in the body work together to maintain homeostasis and carry out various functions. Therefore, the correct answer "function" accurately reflects the main area of interest and study in physiology.

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  • 3. 

    Describe how the body is organized from smallest to largest.

  • 4. 

    Homeostasis can be defined as the existence and maintenance of a relatively constant enviroment within the body.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Homeostasis refers to the body's ability to maintain a stable internal environment despite external changes. It involves various physiological processes that regulate temperature, pH levels, blood pressure, and other factors within a narrow range. This constant environment is crucial for the proper functioning of cells, tissues, and organs. Therefore, the given statement is true as it accurately defines homeostasis as the existence and maintenance of a relatively constant environment within the body.

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  • 5. 

    What are some components of extracellular fluid?

    • A.

      Volume

    • B.

      Color

    • C.

      Concentration

    • D.

      Pressure

    • E.

      Salidity

    • F.

      Temperature

    Correct Answer(s)
    A. Volume
    C. Concentration
    E. Salidity
    F. Temperature
    Explanation
    Extracellular fluid refers to the fluid outside of cells in the body. It plays a crucial role in maintaining the balance of various substances and providing a medium for cellular activities. The components mentioned in the answer, namely volume, concentration, salidity, and temperature, are all important factors that can vary in extracellular fluid. Volume refers to the amount of fluid present, concentration refers to the relative amount of solutes dissolved in the fluid, salidity refers to the salt content, and temperature refers to the degree of heat. These components can fluctuate depending on various physiological and environmental factors.

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  • 6. 

    The components of extracellular fluid are also known as

    Correct Answer(s)
    variables
  • 7. 

    To stay around the normal value is known as the ...

    • A.

      Median

    • B.

      Integrating center

    • C.

      Set point

    • D.

      Negative feedback

    Correct Answer
    C. Set point
    Explanation
    The term "set point" refers to the desired or target value that a system aims to maintain or achieve. In the context of the given question, staying around the normal value implies that there is a specific value that the system is trying to maintain, which is known as the set point. This term is commonly used in control systems where feedback mechanisms are employed to keep a variable within a desired range.

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  • 8. 

    Components generally stay at precisely one value.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    Components generally do not stay at precisely one value. In electronic circuits, components such as resistors, capacitors, and inductors can have varying values depending on the circuit conditions. Additionally, in programming, variables can change their values during the execution of a program. Therefore, it is not accurate to say that components always stay at precisely one value.

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  • 9. 

    Negative Feedback maintains homeostasis. The ______________ senses a disturbance in homeostasis. Then the signal is sent to the _______________, which sends a message to the ____________ that will make the change and return the body back to its set point. [separate each answer with a comma]

    Correct Answer
    receptor, control center, effector
    Explanation
    separate each answer with a comma

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  • 10. 

    An example of negative feedback is temperature rising or falling in the body due to exercise. When temperature rises above our set point (98.6) what actions and effects take place in the body to return the body back to homeostasis? Check all that apply.

    • A.

      Blood flow decreases

    • B.

      Blood flow increases

    • C.

      Sweating increases

    • D.

      Temperature increases

    • E.

      Shivering increases

    • F.

      Temperature declines

    • G.

      Body cools

    • H.

      Body heat is conserved

    Correct Answer(s)
    B. Blood flow increases
    C. Sweating increases
    F. Temperature declines
    G. Body cools
    Explanation
    When the body temperature rises above the set point, the body initiates several actions to return to homeostasis. One of these actions is increasing blood flow, which helps to dissipate heat from the body. Sweating also increases, as it helps to cool the body down through evaporation. Additionally, the temperature declines as the body cools down, and this is accompanied by a decrease in body heat.

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  • 11. 

    Negative feedback involves a constant back and forth in reactions to go in a straight line overall.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Negative feedback involves a constant back and forth in reactions, which helps maintain stability in a system. It works by sensing any deviations from a desired state and then applying corrective measures to bring the system back to its original state. This continuous loop of monitoring and adjusting helps to keep the system on track and prevents it from deviating too far from the desired outcome. Therefore, the statement that negative feedback involves a constant back and forth in reactions to go in a straight line overall is true.

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  • 12. 

    Positive Feedback is _______________.

    • A.

      Always rising and falling

    • B.

      A negation of the the problem

    • C.

      Self-amplifying

    • D.

      (a) and (b)

    • E.

      All of the above

    Correct Answer
    C. Self-amplifying
    Explanation
    Positive feedback is self-amplifying because it refers to a process in which the output of a system enhances or reinforces the input, leading to an increase in the initial signal or condition. This means that positive feedback causes a continuous cycle of growth or amplification, rather than a balance or negation of the problem. Therefore, the correct answer is self-amplifying.

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  • 13. 

    Give an example of Positive Feedback and explain how it is self-amplifying.

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  • Current Version
  • Mar 22, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Oct 15, 2010
    Quiz Created by
    Carlyh
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