Endocrine System

    Endocrine System
    Which structure controls the endocrine system and integrates the activities of the nervous and endocrine systems?
    Hypothalamus secretes regulatory hormones that control endocrine cells in the ant pit gland, produces ADH and oxytocin and contains “autonomic centres” that exert neural control over endocrine cells of the adrenal medullae.
    Author: rikazzz Comment
    Endocrine System
    The hormones known as “catecholamines” (adrenaline, noradrenaline and dopamine) are not lipid soluble. Therefore their receptor sites are:
    With the receptors on the outside of the membrane, catecholamines do not need to be able to penetrate the membrane.
    Author: rikazzz Comment
    Endocrine System
    What hormones are produced by the adrenal medulla?
    The medulla is the deeper part of the adrenal gland.
    Author: rikazzz Comment
    Endocrine System
    Which of the following is a substantial difference between amino acid-based hormones and steroid hormones?
    Steroid hormones are fat soluble; AA-based hormones are water soluble (and not fat soluble).
    Author: rikazzz Comment
    Endocrine System
    What is a collective name for hormones that are derived from the amino acid tyrosine?
    The “catechol” group is a benzene ring with two hydroxyl groups attached. The amine is NH2. They are made from tyrosine by removing the carboxylic acid group and adding a second hydroxyl group.
    Author: rikazzz Comment
    Endocrine System
    Which of the following could be a definition of a hormone?
    Hormones are also known as circulating hormones, meaning they are transported in the blood.
    Author: rikazzz Comment
    Endocrine System
    What hormone does the thyroid produce?
    Thyroxine (or tetraiodothyronine) is converted to triiodothyronine in target tissues.
    Author: rikazzz Comment
    Endocrine System
    Which structure produces the hormones ADH and oxytocin?
    ADH and OT are produced in the hypothalamus and are then transported to the posterior pituitary for release.
    Author: rikazzz Comment
    Endocrine System
    From where are antidiuretic hormone and oxytocin released?
    ADH and OT are produced in the hypothalamus and transported to the posterior pituitary.
    Author: rikazzz Comment
    Endocrine System
    Which statement applies to steroid hormones?
    As steroid hormones are lipid soluble, their receptors are inside the cell as they can cross the plasma membrane.
    Author: rikazzz Comment