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Endocrine glands Knowledge-Based Practice

Biology · Human Body & Physiology · Biology · Endocrine System

5 Biology practice questions on Endocrine glands. Questions that assess core concepts and understanding.

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Questions

  1. 1.

    Which endocrine gland is located immediately superior to each kidney and is structurally divided into an outer cortex that synthesizes steroid hormones and an inner medulla that secretes catecholamines?

    • A) Pituitary gland
    • B) Thymus gland
    • C) Adrenal gland
    • D) Pancreas
  2. 2.

    Which of the following endocrine glands primarily secretes a hormone that raises blood calcium ion concentration by stimulating osteoclast activity and enhancing renal calcium reabsorption?

    • A) Parathyroid glands
    • B) Thymus gland
    • C) Adrenal glands
    • D) Pancreatic islets
  3. 3.

    Which of the following endocrine glands is located in the anterior neck overlying the trachea and requires dietary iodine to synthesize hormones that regulate basal metabolic rate?

    • A) Thyroid gland
    • B) Adrenal gland
    • C) Parathyroid gland
    • D) Thymus gland
  4. 4.

    Which of the following endocrine glands secretes melatonin to help regulate circadian rhythms and sleep-wake cycles in humans?

    • A) Pituitary gland
    • B) Pineal gland
    • C) Thyroid gland
    • D) Adrenal gland
  5. 5.

    Which of the following characteristics fundamentally distinguishes endocrine glands from exocrine glands in the human body?

    • A) They secrete digestive enzymes through specialized ducts into body cavities.
    • B) They release substances directly onto epithelial surfaces through tubular channels.
    • C) They produce localized neurotransmitters that diffuse exclusively across synaptic clefts.
    • D) They are ductless glands that release hormones directly into surrounding interstitial fluid and the bloodstream.

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