Endocrine Glands Overview Quiz

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Questions and Answers

What hormonal imbalance can jet lag cause?

  • Increased melatonin levels
  • Decreased insulin secretion
  • Increased testosterone levels
  • Off melatonin levels (correct)

What characterizes Type 1 Diabetes Mellitus?

  • Consistent high levels of insulin
  • Increased glucose uptake by cells
  • Downregulation of glucagon receptors
  • Destruction of beta cells (correct)

What hormone is triggered by hypocalcemia in blood?

  • Cortisol
  • Parathyroid Hormone (correct)
  • Epinephrine
  • Thyroid Hormone

How does insulin affect blood glucose levels?

<p>Decreases blood glucose levels by facilitating glucose uptake (A)</p> Signup and view all the answers

What effect does long-term stress have on the adrenal cortex?

<p>Mineralocorticoids and glucocorticoids secretion (D)</p> Signup and view all the answers

Which condition is characterized by the hyposecretion of all hormones from the adrenal cortex?

<p>Addison's Disease (B)</p> Signup and view all the answers

What causes the increase in blood glucose levels in Type 2 Diabetes Mellitus?

<p>Excessive insulin production leads to receptor downregulation (A)</p> Signup and view all the answers

Which hormone is primarily responsible for sperm production?

<p>Testosterone (B)</p> Signup and view all the answers

How does melatonin affect sleep?

<p>Triggers sleep when levels increase in darkness (B)</p> Signup and view all the answers

What is a secondary function of androgens?

<p>Promoting muscle growth and secondary sex characteristics (D)</p> Signup and view all the answers

What physiological change occurs due to Addison's Disease?

<p>Bronze skin coloration (C)</p> Signup and view all the answers

Which effect does progesterone have in females?

<p>Regulates pregnancy and menstrual cycle (B)</p> Signup and view all the answers

What is a possible condition resulting from hypersecretion of adrenal hormones?

<p>Male hair pattern in women (B)</p> Signup and view all the answers

What effect does glucagon have on blood glucose levels?

<p>It stimulates the release of glucose into the blood (A)</p> Signup and view all the answers

What is the primary role of parathyroid hormone in the bones?

<p>Stimulate osteoclasts (C)</p> Signup and view all the answers

Which of the following hormones is NOT produced by the gonads?

<p>Insulin (A)</p> Signup and view all the answers

What condition can cause gender-specific hair patterns in women?

<p>Adrenogenital syndrome (A)</p> Signup and view all the answers

What external factor may affect melatonin production?

<p>Blue light exposure (B)</p> Signup and view all the answers

What is a common symptom of Addison's Disease?

<p>Weak muscles (C)</p> Signup and view all the answers

What is the primary role of Prolactin in the body?

<p>Produces breast milk (B)</p> Signup and view all the answers

Which hormone stimulates the release of Thyroid Stimulating Hormone (TSH)?

<p>Thyrotropin releasing hormone (C)</p> Signup and view all the answers

What effect does Growth Hormone have on the body?

<p>Stimulates protein synthesis (A)</p> Signup and view all the answers

What is the function of Corticotropic Releasing Hormone?

<p>Stimulates the release of ACTH (D)</p> Signup and view all the answers

Which hormone is responsible for increasing blood volume by inhibiting urine production?

<p>Antidiuretic Hormone (A)</p> Signup and view all the answers

What is the main effect of Calcitonin?

<p>Decreases blood calcium levels (B)</p> Signup and view all the answers

Which of the following is a characteristic of Hyperthyroidism?

<p>High heart rate and bulging eyes (B)</p> Signup and view all the answers

What condition is associated with an excessive secretion of glucocorticoids?

<p>Cushing's Syndrome (D)</p> Signup and view all the answers

The adrenal cortex produces which types of hormones primarily?

<p>Mineralocorticoids and glucocorticoids (A)</p> Signup and view all the answers

What is the target tissue for Follicle Stimulating Hormone (FSH)?

<p>Gonads (A)</p> Signup and view all the answers

What is the role of Aldosterone in the body?

<p>Increases sodium reabsorption (D)</p> Signup and view all the answers

Which hormone has an important role in uterine contractions during labor?

<p>Oxytocin (A)</p> Signup and view all the answers

Which hormone is involved in the body's response to long-term stress?

<p>Cortisol (B)</p> Signup and view all the answers

What effect does an increase in Thyroid hormones have on cells?

<p>Stimulates cellular respiration (A)</p> Signup and view all the answers

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Study Notes

Endocrine Glands Overview

  • The hypothalamus releases several key hormones influencing the anterior pituitary:
    • Prolactin Inhibitory Hormone: inhibits prolactin release.
    • Thyrotropin Releasing Hormone: stimulates thyroid function.
    • Corticotropin Releasing Hormone: stimulates adrenal cortex hormone release.
    • Growth Hormone Releasing Hormone: stimulates growth hormone secretion.
    • Gonadotropin Releasing Hormone: stimulates secretion of follicle-stimulating hormone (FSH) and luteinizing hormone (LH).

Anterior Pituitary Hormones

  • Prolactin: stimulates milk production in mammary glands.
  • Thyroid Stimulating Hormone (TSH): prompts the thyroid gland to release thyroid hormones.
  • Adrenocorticotropic Hormone (ACTH): stimulates the adrenal cortex, impacting stress hormone levels.
  • Growth Hormone (GH): promotes growth in tissues including bones and muscles.
  • Follicle Stimulating Hormone (FSH): plays a crucial role in reproductive processes.

Posterior Pituitary Functions

  • Releases hormones produced in the hypothalamus, namely:
    • Oxytocin: induces labor contractions and milk ejection in nursing women.
    • Antidiuretic Hormone (ADH): regulates water balance, reducing urine production and increasing blood volume.

Thyroid Gland Hormones

  • Thyroid Hormones (T3 and T4): regulate metabolism, increase cellular respiration, and influence growth and development.
  • Calcitonin: lowers blood calcium levels by promoting calcium deposition in bones.
  • Disorders include:
    • Goiter: caused by iodine deficiency affecting hormone production.
    • Cretinism: results from congenital hypothyroidism, leading to developmental delays.
    • Hyperthyroidism: may cause increased heart rate, anxiety, and weight loss.

Adrenal Glands Hormones

  • Cortex:
    • Mineralocorticoids (Aldosterone): regulate sodium and water balance, influencing blood pressure.
    • Glucocorticoids (Cortisol): manage stress response and glucose metabolism.
    • Sex Hormones (Androgens and Estrogens): contribute to secondary sexual characteristics.
  • Medulla: releases epinephrine and norepinephrine, enhancing 'fight or flight' responses.
  • Disorders include:
    • Cushing's Syndrome: results from excess glucocorticoids, leading to weight gain and muscle weakness.
    • Addison's Disease: hyposecretion of adrenal hormones results in fatigue and skin changes.

Parathyroid Gland Functions

  • Parathyroid Hormone (PTH): increases blood calcium levels by stimulating osteoclast activity and promoting calcium absorption in the kidneys and intestines.

Pineal Gland Functions

  • Melatonin: regulates sleep patterns, increasing at night and decreasing in light; influenced by light exposure which can affect sleep quality.

Pancreas Hormones

  • Insulin (from beta cells): decreases blood glucose by facilitating cellular uptake of glucose.
  • Glucagon (from alpha cells): increases blood glucose levels by promoting glycogen breakdown.
  • Diabete types:
    • Type 1 Diabetes: autoimmune destruction of insulin-producing cells leads to insulin deficiency.
    • Type 2 Diabetes: insulin resistance develops with prolonged high blood sugar levels, often associated with obesity.

Gonadal Hormones

  • Androgens (Testosterone): responsible for male secondary sexual characteristics and sperm production.
  • Estrogens and Progesterone: regulate female secondary sexual characteristics, menstrual cycle, and pregnancy.

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