DHA Medical Licensing Exam The Endocrine System — practice questions
48 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice DHA Medical Licensing Exam The Endocrine System in the app →What is the defining feature of an endocrine gland?Histamine released by immune cells in the bronchial tree makes neighbouring smooth muscle constrict. Which kinAdrenal hormones of the fight-or-flight response act within seconds. How long can certain reproductive hormoneAmine hormones are synthesised from which amino acids?Testosterone, aldosterone and cortisol are all built from which precursor?Why must lipid-derived hormones travel to their target cell bound to a transport protein?All amino acid derived hormones bind cell membrane receptors except one lipid-soluble group. Which group is thIn the cAMP second messenger system, the activated G protein switches on which enzyme?Activated phospholipase C cleaves a membrane-bound phospholipid into which two molecules?A hormone that stays at a high level in the bloodstream causes its target cells to do what?Insulin drives glucose into liver glycogen while glucagon breaks that glycogen back down. Which hormone interaOsmoreceptors sense a rise in blood osmolarity and antidiuretic hormone is released. Which class of stimulus tWhich statement about the posterior pituitary is correct?The paraventricular nuclei make oxytocin. Which hormone do the supraoptic nuclei make?Antidiuretic hormone acts on target cells in which location?Why does antidiuretic hormone also carry the name vasopressin?Which four anterior pituitary hormones are grouped as the tropic hormones?What does the hypophyseal portal system make possible?The diabetogenic effect of growth hormone raises blood glucose through which action?Excess growth hormone in an adult who has already stopped growing causes which disorder?Where does the thyroid gland sit?Which comparison of triiodothyronine and thyroxine is correct?What proportion of circulating triiodothyronine and thyroxine is bound to plasma transport proteins?Dietary iodine deficiency enlarges the thyroid gland. What accumulates inside it?Which cells secrete calcitonin, and what does it do to blood calcium?Parathyroid hormone is secreted in response to which change in the blood?Which pair of actions does parathyroid hormone produce at bone and at the kidney tubules?Parathyroid hormone increases dietary calcium absorption by prompting the kidneys to make what?As blood calcium climbs in hyperparathyroidism, how do membrane permeability to sodium and nervous responsivenWhich region of the adrenal cortex produces the mineralocorticoids?How does aldosterone alter the handling of sodium and potassium?Angiotensin-converting enzyme turns angiotensin I into angiotensin II in which organ?In long-term stress, cortisol drives which set of processes?Which cells of the adrenal medulla release epinephrine and norepinephrine?Which stage of the general adaptation syndrome is the fight-or-flight response?Hyposecretion of corticosteroids produces which laboratory picture?Which cells make melatonin, and what shuts its production down?Which gonadal hormone holds down FSH secretion by the anterior pituitary?Which islet cell makes insulin, and roughly what share of the islet does it form?Which pancreatic secretion blocks the release of both glucagon and insulin?Between which two values is blood glucose concentration tightly maintained?Insulin raises glucose uptake mainly through which cellular action?Insulin appears to act through which kind of receptor?Which cells take up glucose without needing insulin at all?Glucagon makes the liver take up amino acids and convert them into glucose. What is this response called?Stretching of the atrial wall releases atrial natriuretic peptide. What does that hormone then do?The kidneys release erythropoietin in response to what?From which embryonic tissue does the anterior pituitary gland arise?