Question

In: Anatomy and Physiology

1.a specific receptor protein on the plasma membrane defines the target cell [ Choose ]     ...

1.a specific receptor protein on the plasma membrane defines the target cell

[ Choose ]            (N) neither type            (W) water-soluble hormones            (L) lipid-soluble hormones            (B) both types      

2. hormone-activated receptor protein in nucleus activates mRNA transcription

[ Choose ]            (N) neither type            (W) water-soluble hormones            (L) lipid-soluble hormones            (B) both types      

3. ATP is hydrolyzed to form cycle AMP

[ Choose ]            (N) neither type            (W) water-soluble hormones            (L) lipid-soluble hormones            (B) both types      

4. hormone induces a physiological response in specific target cells

[ Choose ]            (N) neither type            (W) water-soluble hormones            (L) lipid-soluble hormones            (B) both types      

5. autocrine cells synthesize hormone

[ Choose ]            (N) neither type            (W) water-soluble hormones            (L) lipid-soluble hormones            (B) both types

Solutions

Expert Solution

Answer 1

Correct answer - Water soluble hormone

Explanation - Water soluble hormone is not able to cross the plasma membrane. Therefore for them to exert their action they have to act on the receptor on the plasma membrane.

Incorrect answer:

Lipid soluble hormone can cross the plasma membrane and therefore have receptors in the cytosol or nucleus

Answer 2

Correct answer - lipid soluble hormone

Explanation - lipid soluble hormones have intracellular receptors. After combing with intracellular receptors, they are transport to the nucleus.

In the nucleus, the hormone acts on the DNA

Answer 3 -

Correct answer - water soluble hormones

Explanation-

  • Water soluble hormone cannot pass through the plasma membrane.
  • They act on a receptor on the plasma membrane
  • Activation of this receptor, leads to activation of secondary messenger.
  • This is secondary messenger is cAMP

Incorrect answer

  • Lipid soluble hormone act on intracellular receptors as they can cross the plasma membrane.
  • They are then transported to the nucleus.
  • They dont need secondary messengers

Answer 4

Correct answer - both type of hormones

Both type of hormones act on the target cells to produce physiological response

Answer 5

Correct answer - water soluble.

In autocrine syntheses hormone act on the surface of the cell that produces it.

As water soluble hormone act on the cell surface receptors the correct answer is water-soluble hormone.

Sydney Mullin answered 9 months ago
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