A&P - Chapter 25 (Part 3) Flashcards Preview

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Flashcards in A&P - Chapter 25 (Part 3) Deck (13)
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1
Q

What does target cells sensitivity depend on?

A

The number of receptors it has for that hormone

- the more you have the greater effect the hormone will have

2
Q

How can the number of cells change?

A

Due to cell growth and repair

3
Q

Up-regulation

A

Receptors are synthesized faster than they are broken down

4
Q

What does up regulation do?

A

Increases sensitivity

5
Q

Down regulation

A

Receptors are broken down faster than they are synthesized/replaced

6
Q

What does down regulation do?

A

Decreases sensitivity

7
Q

What are prostaglandins?

A

Tissue hormones

8
Q

Where are prostaglandins found?

A

In a wide variety of body tissues

  • typically not hormones
  • powerful substances
9
Q

What kind of unique group are prostaglandins?

A

Lipid/fatty acid based hormones

10
Q

How are prostaglandins produced?

A

In a tissue and then diffused only a short distance to act on cells in that tissue
- not transported through blood

11
Q

What do prostaglandins influence?

A

Many body functions

12
Q

What are 5 examples of the body functions that prostaglandins influence?

A
  1. Respiration
  2. BP
  3. GI secretions
  4. Inflammation
  5. Reproduction
13
Q

Why are prostaglandins called prostaglandins?

A

The first one was discovered in semen

- prostate

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