Chemical Classification of Hormones
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Chemical Classification of Hormones

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Questions and Answers

Where are receptors of protein hormones and adrenal medullary hormones situated?

  • Golgi apparatus
  • Nucleus
  • Endoplasmic reticulum
  • Cell membrane (correct)

    • Which type of hormone has receptors located in the cytoplasm of target cells?

  • Peptide hormones
  • Protein hormones
  • Amino-acid derivative hormones
  • Steroid hormones (correct)

    • What is the effect called when two or more hormones work together to produce a particular result?

  • Additive Effect
  • Permissive Effect
  • Antagonistic Effect
  • Synergistic Effect (correct)

    • Which hormone type requires receptors in the nucleus of the cell for its actions?

    <p>Thyroid hormones</p> Signup and view all the answers

    Which hormone type has receptors that are specifically for one single hormone?

    <p>Steroid hormones</p> Signup and view all the answers

    In hormone interactions, what does the Permissive Effect refer to?

    <p>Enhancing responsiveness of a target organ to a second hormone</p> Signup and view all the answers

    Which type of hormones do not enter the target cells but instead bind to receptors on the plasma membrane?

    <p>Polypeptides</p> Signup and view all the answers

    Which of the following hormones are considered lipophilic or hydrophobic?

    <p>Estrogen</p> Signup and view all the answers

    What is the main difference between polypeptide and protein hormones?

    <p>Amino acid content</p> Signup and view all the answers

    Where are the receptors for polypeptide hormones located?

    <p>Plasma membrane outer surface</p> Signup and view all the answers

    Which type of hormones bind to intracellular proteins and act directly within the target cells?

    <p>Steroids</p> Signup and view all the answers

    What is a common characteristic of polar (water-soluble) hormones?

    <p>Bind to receptors on plasma membrane</p> Signup and view all the answers

    What is the main difference between negative feedback and positive feedback in hormone secretion?

    <p>Negative feedback reverses the stimulus, while positive feedback amplifies the stimulus.</p> Signup and view all the answers

    Which gland is responsible for secreting Growth Hormone (GH) and Thyroid-stimulating hormone (TSH)?

    <p>Anterior Pituitary gland</p> Signup and view all the answers

    What type of hormones are Growth Hormone (GH) and Thyroid-stimulating hormone (TSH)?

    <p>Polar hormones</p> Signup and view all the answers

    Which hormone prevents water loss by increasing water reabsorption in the kidneys?

    <p>Antidiuretic hormone (ADH)</p> Signup and view all the answers

    Which gland secretes Melanocyte Stimulating Hormone (MSH)?

    <p>Anterior Pituitary gland</p> Signup and view all the answers

    What hormone is responsible for uterine contractions during childbirth and milk ejection during breastfeeding?

    <p>Oxytocin (OT)</p> Signup and view all the answers

    Study Notes

    Hormone Receptors

    • Receptors of protein hormones and adrenal medullary hormones are situated on the plasma membrane of target cells.
    • Steroid hormones have receptors located in the cytoplasm of target cells.

    Hormone Interactions

    • The effect of two or more hormones working together to produce a particular result is called synergism.
    • The Permissive Effect refers to when one hormone cannot produce its effect without the presence of another hormone.

    Hormone Types

    • Lipophilic or hydrophobic hormones are steroid hormones, which require receptors in the nucleus of the cell for their actions.
    • Polypeptide hormones have receptors located on the plasma membrane of target cells and do not enter the cell.
    • A common characteristic of polar (water-soluble) hormones is that they cannot cross the plasma membrane and bind to receptors on the surface of the cell.

    Hormone Regulation

    • The main difference between negative feedback and positive feedback in hormone secretion is that negative feedback reduces hormone secretion, while positive feedback increases hormone secretion.

    Endocrine Glands and Hormones

    • The pituitary gland is responsible for secreting Growth Hormone (GH) and Thyroid-stimulating hormone (TSH).
    • Growth Hormone (GH) and Thyroid-stimulating hormone (TSH) are polypeptide hormones.
    • The hormone that prevents water loss by increasing water reabsorption in the kidneys is Antidiuretic Hormone (ADH).
    • The pituitary gland secretes Melanocyte Stimulating Hormone (MSH).
    • Oxytocin is responsible for uterine contractions during childbirth and milk ejection during breastfeeding.

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    Description

    Learn about the chemical classification of hormones, including amines, polypeptides, proteins, glycoproteins, and steroids. Explore the different types of hormones derived from amino acids and lipids.

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