Prof. Chhin Senya (Physiology)

131 Questions | Total Attempts: 40

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Prof. Chhin Senya (Physiology) - Quiz

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Questions and Answers
  • 1. 
    Which of these statements about hypothalamus releasing hormone is true?
    • A. 

      They are secreted into capillaries in the median eminence.

    • B. 

      They are transported by portal veins to the anterior pituitary.

    • C. 

      They stimulate the secretion of specific hormones from the anterior pituitary.

    • D. 

      All of these are true.

  • 2. 
    The hormones primarily responsible for setting the basal metabolic rate and for promoting the maturation of the brain is:
    • A. 

      Cortisol

    • B. 

      ACTH

    • C. 

      TSH

    • D. 

      Thyroxine

  • 3. 
    Which of these statements about the adrenal cortex is true?
    • A. 

      It is not innervated by nerve fibers and secretes some androgens.

    • B. 

      The zona glomerulosa secretes aldosterone

    • C. 

      The zona fasciculata stimulated by ACTH

    • D. 

      All of these are true

  • 4. 
    Which of these statements about the hormone insulin is true?
    • A. 

      It secretes by the alpha cells in the islets of Langerhans

    • B. 

      It secretes to response to a rise in blood glucose

    • C. 

      It stimulates the production of glycogen and fat

    • D. 

      Both b and c are true

  • 5. 
    Steroid hormones are secreted by:
    • A. 

      The adrenal cortex

    • B. 

      The gonads

    • C. 

      THe thyroid

    • D. 

      Answer a and b are true

  • 6. 
    Secretion of these hormones would be increased in a person with endemic goiter?
    • A. 

      TSH

    • B. 

      Thyroxine

    • C. 

      Triiodothyronine

    • D. 

      All of these

  • 7. 
    Which of these hormones are used in cyclic AMP as second messenger?
    • A. 

      Testosterone

    • B. 

      Insulin

    • C. 

      Cortisol

    • D. 

      Epinephrine 

  • 8. 
    Which of these terms best describes the interaction of insulin and glucagon?
    • A. 

      Synergistic 

    • B. 

      Permissive

    • C. 

      Antagonistic

    • D. 

      Cooperative

  • 9. 
    Which of these correctly describes the role of inositol triphosphate in hormones action?
    • A. 

      It activates adenylate cyclase

    • B. 

      It stimulates the release of calcium from the endoplasmic reticulum

    • C. 

      It actives protein kinase

    • D. 

      All of these are true

  • 10. 
    Which of these hormones may have a primary role on many circardian rhythms?
    • A. 

      Estradiol

    • B. 

      Insulin

    • C. 

      Adrenocorticotropic hormone

    • D. 

      Melatonin

  • 11. 
    Human chorionic gonadotropin (hCG) is secreted by:
    • A. 

      The anterior pituitary

    • B. 

      The posterior pituitary

    • C. 

      The placenta

    • D. 

      The thymus

  • 12. 
    What do insulin-like growth factors, neurotrophins, nitric oxide, and lymphokines have in common?
    • A. 

      They are hormones

    • B. 

      They are autocrine or paracrine regulators

    • C. 

      They are neurotransmitters

    • D. 

      They are all use cyclic AMP as a second messenger

  • 13. 
    The use of a chemical messenger to transfer information from cell to cell within a single tissue is referred to as ................. communication.
    • A. 

      Direct

    • B. 

      Paracrine

    • C. 

      Hormonal

    • D. 

      Endocrine

  • 14. 
    Cyclic AMP functions as a second messenger to:
    • A. 

      Build proteins and catalyze specific reactions

    • B. 

      Activate adenylate cyclase

    • C. 

      Open ion channels and activate key enzymes in the cytoplasm

    • D. 

      Bind the hormone receptor complex to DNA segments

  • 15. 
    Adrenocorticotropic hormones (ACTH) stimulates the release of:
    • A. 

      Thyroid hormones by the hypothalamus

    • B. 

      Gonadotropins by the adrenal gland

    • C. 

      Growth hormones by the hypothalamus

    • D. 

      Steroid hormones by the adrenal glands

  • 16. 
    FSH production in male supports:
    • A. 

      The maturation of sperm by stimulating nurse cells

    • B. 

      The development of muscles and strength 

    • C. 

      The production of male sex hormones

    • D. 

      An increased desire for sexual activity

  • 17. 
    The two hormones releases by the posterior lobe of the pituitary gland are:
    • A. 

      GH and gonadotropin

    • B. 

      Estrogen and progesterone

    • C. 

      GH and prolactin

    • D. 

      ADH and oxytocin

  • 18. 
    All of the following are true of the endocrine system, except:
    • A. 

      Release chemicals into the bloodstream for distribution throughout the body

    • B. 

      Release hormones that simultaneously after the metabolism activities of many different tissue and organs

    • C. 

      Produces effects that can last for hours days and even longer

    • D. 

      Produces rapid local brief-duration response to specific stimuli.

  • 19. 
    All cell's hormonal sensitivities are determined by the:
    • A. 

      Chemical nature of hormones

    • B. 

      Quantity of circulating hormones

    • C. 

      Shape of the hormone molecules 

    • D. 

      Presence of absence of appropriate receptors

  • 20. 
    Endocrine organs can be regulated by all of the following, except:
    • A. 

      Hormones from other endocrine glands

    • B. 

      Change in genetic make-up of certain hypothalamic cells

    • C. 

      Direct neural stimulation

    • D. 

      Changes in the composition of extracellular fluid

  • 21. 
    Which is not symptom of the Cushing's disease?
    • A. 

      High BP

    • B. 

      Hyperglycemia

    • C. 

      Suppressed immune function

    • D. 

      Goiter

  • 22. 
    Which of the following could be theoretically result on dwarfism?
    • A. 

      Pituitary tumor making excess TSH

    • B. 

      Inactivating mutations of IGF-1 receptors

    • C. 

      Delayed onset of puberty

    • D. 

      Normal GH, but decreased feedback of growth hormones on GHRH

  • 23. 
    Choose the correct statement:
    • A. 

      During times of stress, cortisol acts as an anaerobic hormone in muscles and adipose tissue

    • B. 

      A deficiency pf thyroid hormones would result in increased cellular concentrations of Na+/K+-ATPase pumps in target tissue.

    • C. 

      A lack of iodide in the diet will have no significant effect on circulating thyroid hormones for at least several weeks

    • D. 

      The posterior pituitary is connected to the hypothalamus by long portal vessels

  • 24. 
    Low plasma calcium intake cause:
    • A. 

      PTH-mediated increase in 25-OH D.

    • B. 

      Decrease in renal 1-hydroxylase activity

    • C. 

      Decrease in the urinary excretion of calcium

    • D. 

      Increase in vitamin D release from the skin

  • 25. 
    Role of melatonin:
    • A. 

      Antioxidant effect as vitamin E

    • B. 

      Participle in metabolism of glucose

    • C. 

      Produce hyperglycemia

    • D. 

      Produce low blood plasma calcium

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