Hormones and Receptors Overview
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Questions and Answers

Which hormone stimulates the adrenal cortex to produce various hormones?

  • Adrenocorticotropic (correct)
  • Follicle-stimulating
  • Thyroid-stimulating
  • Luteinizing

Which hormone is NOT secreted by the anterior pituitary gland?

  • Thyroid-stimulating hormone
  • Melanocyte-stimulating hormone
  • Gonadotrophin-releasing hormone (correct)
  • Growth hormone

What is the primary function of parathyroid hormone?

  • Ensure sufficient water concentration in blood
  • Regulate sodium levels in urine
  • Maintain calcium levels in the blood (correct)
  • Control potassium levels in the blood

Which hormone is primarily responsible for sodium reabsorption in the kidneys?

<p>Aldosterone (D)</p> Signup and view all the answers

Which statement regarding calcium homeostasis is NOT accurate?

<p>1,25-dihydroxycholecalciferol enhances parathyroid hormone action (B)</p> Signup and view all the answers

Which of the following hormones is released by the anterior pituitary gland?

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

What is the primary role of aldosterone in the body?

<p>Increasing Na+ reabsorption by the kidneys (B)</p> Signup and view all the answers

Which of the following is true regarding type I diabetes?

<p>Patients lack functioning insulin-producing cells (B)</p> Signup and view all the answers

Which substance is primarily responsible for monitoring extracellular calcium levels?

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

Which hormone promotes the release of calcium from bones into the bloodstream?

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

Flashcards

Follicle-stimulating hormone (FSH)

A hormone produced by the anterior pituitary gland, responsible for stimulating the development of ovarian follicles in females and sperm production in males.

Where are steroid hormone receptors located?

Steroid hormones bind to receptors located within the cytoplasm of target cells.

What type of hormone activates second messengers?

Second messengers are signaling molecules activated in response to peptide hormones, not steroid or thyroid hormones.

What is the primary function of parathyroid hormone (PTH)?

The parathyroid hormone (PTH) ensures that calcium levels in the blood remain within a normal range.

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What is the primary cause of type 1 diabetes?

Individuals with type 1 diabetes lack beta cells in the islets of Langerhans, resulting in an inability to produce insulin.

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What type of hormone triggers second messengers?

Second messengers are intracellular signaling molecules activated by peptide hormones.

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What is the relationship between Calcitonin and PTH?

Calcitonin and parathyroid hormone (PTH) have opposing effects on extracellular calcium concentration.

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Study Notes

Hormone Receptors and Actions

  • FSH and HCG are hormones.
  • Steroid hormone receptors are located within the cytoplasm.
  • Peptide hormones activate second messengers.
  • Receptors for steroid hormones are located in the cytoplasm.

Pituitary Hormones

  • Melanocyte-stimulating hormone, thyroid-stimulating hormone, and growth hormone are released by the anterior pituitary.
  • Gonadotrophin-releasing hormone is not released by the anterior pituitary.
  • Adrenocorticotropic hormone stimulates the adrenal cortex to produce hormones.

Hormone Actions and Target Tissues

  • Parathyroid hormone maintains adequate calcium levels in the blood.
  • Aldosterone stimulates sodium reabsorption in the kidneys.
  • Type 1 diabetes can be caused by a lack of beta cells or functional insulin receptors in the body.
  • Type 1 diabetes cannot be managed by diet and exercise alone.
  • Individuals with type 1 diabetes may lack beta cells or have non-functional insulin receptors.

Calcium Homeostasis

  • Calcitonin, parathyroid hormone, and 1,25-dihydroxycholecalciferol are vital for calcium homeostasis.
  • Glucagon is not a major player in calcium balance.
  • Monitoring extracellular calcium levels is a crucial aspect of the parathyroid's role.
  • Inhibiting osteoclast activity can help normalize high extracellular calcium levels.
  • Calcitonin and parathyroid hormone have opposing effects on extracellular calcium.
  • 1,25-dihydroxycholecalciferol and parathyroid hormone have opposing effects on extracellular calcium.

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Description

Dive into the fascinating world of hormones and their receptors. This quiz covers key concepts including the functions of various hormones like FSH, HCG, and how they interact with target tissues. Test your knowledge on pituitary hormones and calcium homeostasis, and understand the physiological roles these hormones play in the body.

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