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Endocrine System Graded A+

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Endocrine System Graded A+ 1. How is the activity of hormones in the bloodstream terminated? - A) By enzymes in the liver and kidneys that degrade the hormones. - B) By the diffusion of receptors-hormone complexes away from the cell membrane. - ️ By enzymes from the liver and kidney break...

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  • August 3, 2024
  • 11
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • endocrine system graded a

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Endocrine System Graded A+


1. How is the activity of hormones in the bloodstream terminated?

- A) By enzymes in the liver and kidneys that degrade the hormones.

- B) By the diffusion of receptors-hormone complexes away from the cell membrane.

- ✔️ By enzymes from the liver and kidney breaking down the hormones.



2. What determines the ability of a target tissue to respond to a specific hormone?

- A) The presence or absence of the correct receptors.

- B) The shape of hormone molecules.

- C) The thickness of the cell membrane.

- D) The quality of the circulating hormone.

- ✔️ The presence or absence of appropriate receptors.



3. Which of the following statements is FALSE regarding the use of steroid hormones for treating poison
ivy or severe allergies?

- A) They can cause hypertrophy of the pituitary and adrenal glands.

- B) Patients need to be gradually taken off the medication to allow the pituitary and adrenal glands to
regain normal function.

- ✔️ They cause the pituitary and adrenal glands to hypertrophy.



4. Hormones that are bound to receptors on target cells do NOT have their activity ended by:

- A) Enzymes in blood plasma that break down peptide hormones attached to cell membrane
receptors.

- B) The transportation of the receptor-hormone complex into the cell where the hormone is digested
by lysosomes.

- C) The receptor-hormone complex diffusing away from the cell membrane.

- ✔️ The receptor-hormone complex diffusing away from the cell membrane.

, 5. What are the two endocrine structures located in the brain?

- A) Pituitary gland and pineal gland.

- B) Pineal gland and adrenal gland.

- C) Pituitary gland and thymus gland.

- D) Pineal gland and thymus gland.

- ✔️ Pituitary gland and pineal gland.



6. Put the following steps in order for the simple endocrine reflex pathway involving glucose and insulin:

- ✔️ 2), 6), 1), 7), 5), 4), 8), 3)



7. What is the correct order for the mechanisms that stimulate the pancreas to release insulin in
response to glucose?

- A) 2), 6), 1), 4), 7), 3), 8), 5)

- B) 2), 1), 6), 7), 4), 5), 8), 3)

- C) 2), 6), 1), 7), 5), 4), 8), 3)

- D) 2), 6), 7), 1), 4), 3), 5), 8)

- ✔️ 2), 6), 1), 4), 7), 3), 8), 5)



8. Which statement is TRUE about the simple reflex pathway of the parathyroid glands and hormone?

- A) When enough calcium binds to receptors on the parathyroid gland cells, secretion of parathyroid
hormone is halted.

- B) A deficiency of calcium in blood plasma serves as a negative feedback signal that stops the release
of parathyroid hormone.

- ✔️ When a sufficient number of receptors on the parathyroid gland cells are bonded with calcium,
parathyroid hormone secretion is inhibited.



9. How is the rate of hormone breakdown indicated in circulation, necessitating the termination of
hormone action?

- A) Half-life.

- B) Sensitivity.

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