Chapter 4 (page 22) Flashcards Preview

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Flashcards in Chapter 4 (page 22) Deck (17):
1

Any small leakage that occurs is picked up by the __________ and returned to the
bloodstream.

lymphatic vessels

2

Exchanges between interstitial and intracellular fluids are more complex due to:

the selective permeability of cellular membranes.

3

To sum up - movement of nutrients, respiration gases and wastes are typically _________.

unidirectional.

4

Only fluids that circulates throughout the body and links the external and
internal environment. Exchanges occur in lungs, GI tract and kidneys.

plasma

5

These exchanges can alter plasma composition therefore altering the other two fluid compartments to restore balance.

Exchanges between interstitial and intracellular fluids

6

Electrolytes (salts) provide minerals essential for neuromuscular excitability, membrane permeability and many other cellular functions. Salts are important in controlling fluid movement.

SALTS

7

How the salts enter the body?

enters the body in foods and fluids and during metabolic activity.

8

How salts lost from the body?

salts are lost from the
body in perspiration, feces and urine.

9

Regulating the balance between sodium (type of electrolyte) input and output is an important of the function of the ________.

kidneys

10

This mechanism restores normal extracellular fluid (ECF) volume when it decreases below normal.

The Aldosterone Mechanism

11

What will happen if there is a decrease in ECF volume?

There is also a decrease in blood volume and B/P.

12

When there is a decrease in blood volume and B/P, it stimulates:

Baroreceptors in hypothalamus to stimulate the
Adrenal Cortex to increase secretion of Aldosterone.

13

The Kidneys then start to reabsorb sodium, which will increase the reabsorption of _______. Thus, the ECF volume increases.

water

14

If ADH levels are ______ , most water reaching the collecting ducts is simply allowed to pass through. This results in ______ urine and a reduced volume of body fluids.

low
dilute

15

The amount of water reabsorbed in the collecting ducts of kidneys is _________ to ADH
release.

proportional

16

When ADH levels are _______ , nearly all the filtered water is reabsorbed and a small volume of ____________ urine is excreted.

high
highly concentrated

17

____________ in the hypothalamus sense the ECF concentrations and trigger or inhibit ADH
release.

Osmoreceptors