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Hormonal Communication

Hormones and the adrenal glands

  • 2 things to know
  • Components 01 and 03

Overview

How an endocrine gland signals at a distance and why only target cells respond, and the mineralocorticoids, glucocorticoids and adrenaline the adrenal glands secrete.

What you need to know

Answer each one before you reveal it.

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Key term

Why do hormones affect only particular cells?

Key term

What are the two distinct regions of the adrenal gland?

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    What is the mechanism by which endocrine glands communicate with distant parts of the body?

    Model answer

    Endocrine glands secrete hormones directly into the blood, which then carries them to target tissues throughout the body.

  2. 2

    How are hormones transported around the body after secretion?

    Model answer

    Hormones are transported in the blood plasma to reach all parts of the body.

  3. 3

    Why do hormones only affect certain cells despite being transported throughout the entire body?

    Model answer

    Only target cells or tissues that possess specific complementary receptors for that hormone can detect and respond to it.

  4. 4

    Where are the adrenal glands located in the body?

    Model answer

    Above the kidneys.

  5. 5

    What are the two distinct regions of the adrenal gland?

    Model answer

    The outer cortex and the inner medulla.

  6. 6

    Name the two categories of steroid hormones secreted by the adrenal cortex.

    Model answer

    Mineralocorticoids (e.g. aldosterone) and glucocorticoids (e.g. cortisol).

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