6.1 Hormones & Negative Feedback

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6.1 Hormones & Negative Feedback - Quiz

Anatomy & Physiology
Unit 6 Endocrine System
6.1 - I CAN explain how the endocrine system regulates hormones through negative feedback.


Questions and Answers
  • 1. 

    The main purpose of the endocrine system is to:

    • A.

      Help fight diseases

    • B.

      Regulate body function through hormones

    • C.

      Control blood pressure levels

    • D.

      Sense and respond to stimuli

    Correct Answer
    B. Regulate body function through hormones
    Explanation
    The endocrine system is responsible for regulating body functions through the release of hormones. Hormones act as chemical messengers that travel through the bloodstream to target cells or organs, where they help to coordinate and control various physiological processes. This includes regulating metabolism, growth and development, reproduction, and maintaining homeostasis. By secreting hormones, the endocrine system helps to ensure that the body's systems and processes are functioning properly and in balance. It does not directly help fight diseases, control blood pressure levels, or sense and respond to stimuli.

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  • 2. 

    When a hormone's levels are too high, negative feedback causes:

    • A.

      The glands to stop producing the hormone

    • B.

      The glands to produce more of the hormone

    • C.

      The endocrine system to create more glands to produce the hormone

    • D.

      The entire endocrine system to shut down

    Correct Answer
    A. The glands to stop producing the hormone
    Explanation
    When a hormone's levels are too high, negative feedback causes the glands to stop producing the hormone. This is because negative feedback is a regulatory mechanism that works to maintain homeostasis in the body. When hormone levels are too high, the body senses this and sends signals to the glands to stop producing the hormone in order to bring the levels back to normal. This helps to prevent an overproduction of the hormone and maintain balance in the endocrine system.

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  • 3. 

    A person's adrenaline levels are too high and he feels stressed out. What will help calm him down?

    • A.

      Negative feedback will cause his glands to stop producing adrenaline.

    • B.

      Negative feedback will cause his body to break down the glands that produce adrenaline.

    • C.

      The endocrine system will send a message through his nerves to his brain to tell him to calm down.

    • D.

      All other answers are correct

    Correct Answer
    A. Negative feedback will cause his glands to stop producing adrenaline.
    Explanation
    Negative feedback is a regulatory mechanism in the body that helps maintain balance and stability. In this case, when a person's adrenaline levels are too high and they feel stressed out, negative feedback will signal the glands to stop producing adrenaline. This is because the body recognizes the excess adrenaline and aims to bring it back to normal levels. By inhibiting the production of adrenaline, the body can help calm the person down and reduce their stress levels.

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  • 4. 

    Glands are best defined as:

    • A.

      Hormones that travel through the bloodstream

    • B.

      Organs that produce hormones

    • C.

      Cells that receive hormones

    • D.

      Messages that travel through nerves

    Correct Answer
    B. Organs that produce hormones
    Explanation
    Glands are best defined as organs that produce hormones. Glands are specialized structures in the body that secrete hormones, which are chemical messengers that regulate various bodily functions. These hormones are produced and released by specific glands, such as the pituitary gland, thyroid gland, adrenal glands, and many others. These glands play a crucial role in maintaining homeostasis and regulating processes like growth, metabolism, reproduction, and response to stress. Therefore, the correct answer is "organs that produce hormones."

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  • 5. 

    Hormones are best defined as:

    • A.

      Chemical messages that regulate body function

    • B.

      Cells that release chemical messages

    • C.

      Structures on the surface of target cells that receive messages

    • D.

      Blood vessels that contain chemical messages

    Correct Answer
    A. Chemical messages that regulate body function
    Explanation
    Hormones are chemical messages that regulate body function. They are secreted by various glands in the body and travel through the bloodstream to target cells or organs, where they bind to specific receptors and initiate a response. This allows hormones to control and coordinate various physiological processes such as growth, metabolism, reproduction, and mood regulation. Therefore, the correct answer is "chemical messages that regulate body function".

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  • 6. 

    Negative feedback occurs when:

    • A.

      Hormone levels are too high, so glands stop producing hormones

    • B.

      Hormone levels are too low, so glands produce more hormones

    • C.

      BOTH other answers are correct

    Correct Answer
    C. BOTH other answers are correct
    Explanation
    Negative feedback occurs when hormone levels are either too high or too low. In the first scenario, when hormone levels are too high, the glands responsible for hormone production stop producing hormones to maintain balance. This is a form of negative feedback as it counteracts the excessive hormone levels. In the second scenario, when hormone levels are too low, the glands produce more hormones to restore balance. Again, this is a form of negative feedback as it works to counteract the low hormone levels. Therefore, both of the other answers are correct.

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  • 7. 

    A person's blood sugar is too high because they don't have enough of the hormone INSULIN. What will the endocrine system do in response?

    • A.

      Negative feedback will cause the glands to produce MORE insulin

    • B.

      Negative feedback will cause the glands to STOP producing insulin

    • C.

      Positive feedback will cause the glands to produce MORE insulin

    • D.

      The nerves will send a message to the target cells.

    Correct Answer
    A. Negative feedback will cause the glands to produce MORE insulin
    Explanation
    When a person's blood sugar is too high, the endocrine system will respond by releasing more insulin. Insulin is a hormone produced by the glands in the endocrine system, specifically the pancreas. Insulin helps regulate blood sugar levels by allowing cells to absorb glucose from the bloodstream. In this case, negative feedback is triggered, which means that the high blood sugar levels signal the glands to produce more insulin to lower the blood sugar levels back to normal.

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  • 8. 

    The endocrine system works when _______________ secrete ______________ into the bloodstream.

    • A.

      Hormones; glands

    • B.

      Glands; hormones

    • C.

      Glands; receptors

    • D.

      Hormones; receptors

    Correct Answer
    B. Glands; hormones
    Explanation
    The endocrine system works when glands secrete hormones into the bloodstream. Glands are responsible for producing and releasing hormones, which are chemical messengers that travel through the bloodstream to target cells or organs. These hormones regulate various bodily functions and help maintain homeostasis. Receptors, on the other hand, are proteins located on target cells that bind to specific hormones, allowing them to exert their effects. However, in this case, the correct answer is glands; hormones, as it accurately describes the process of hormone secretion by glands into the bloodstream.

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