Endocrine System

    Endocrine System
    Where are the receptors for almost all of the amino acid-derived hormones located?
    Amino acid-derived hormones cannot get through the plasma membrane so they attach to receptors located on the outside of the membrane.
    Author: rikazzz Comment
    Endocrine System
    Hormones are often released sequentially when directed to by the preceding hormone in the sequence. Which of the following is the initiating hormone?
    TRH from the hypothalamus signals the anterior pituitary to release TSH. TSH causes the release of TH from the thyroid. T4 is one of the thyroid hormones; T3 is the other. Hence choice C is a better answer than D.
    Author: rikazzz Comment
    Endocrine System
    Which structure is composed of glandular epithelial tissue?
    The anterior pituitary produces and releases six hormones.
    Author: rikazzz Comment
    Endocrine System
    What is produced by the beta cells of the pancreas?
    Beta cells of the pancreatic islets produce insulin. The alpha cells produce glucagon.
    Author: rikazzz Comment
    Endocrine System
    Which structure produces ADH and oxytocin?
    ADH and OT are then transported to the posterior pituitary for storage and release.
    Author: rikazzz Comment
    Endocrine System
    What is the difference between endocrine glands and exocrine glands?
    By definition endocrine glands are part of the endocrine system and they produce hormones.
    Author: rikazzz Comment
    Endocrine System
    Peptide hormones are produced (and/or released) by which structure?
    The hypothalamus produces peptide hormones.
    Author: rikazzz Comment
    Endocrine System
    By what term are hormones derived from tyrosine also known?
    Catecholamines (adrenaline, noradrenaline), dopamine and thyroid hormone are all derived from tyrosine.
    Author: rikazzz Comment
    Endocrine System
    What effect does aldosterone have? It causes:
    Aldosterone promotes the absorption of sodium from the filtrate, while potassium (also a positively charged ion) is secreted to maintain electrical neutrality.
    Author: rikazzz Comment
    Endocrine System
    The hormones thyroxine and triiodothyronine contain which element?
    These thyroid hormones require iodine in their molecule.
    Author: rikazzz Comment