Homeostasis Of Fluid And Electrolytes Flashcards Preview

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Flashcards in Homeostasis Of Fluid And Electrolytes Deck (84)
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Homeostasis of cells depends on

Homeostasis of body fluids

1

How much body fluid is in an average male adult human

60%

2

What 4 mechanisms need to be regulated with body fluids

Volume
Distribution
Concentration of solutes
pH

3

What are the two main fluid compartments

Intracellular (in the cell)
Extracellular (outside the cell)

4

What types of extracellular fluid is there?

Intravascular (in the blood)
Interstitial fluid (inbetween cells), and transcellular fluid (just know it's there)

5

Interstitial fluid

Is a type of extracellular fluid

6

ICF has more of what

Potassium and protien

7

ECF has more of what?

Sodium, chloride,and bicarbonate

8

Where does the movement of water btw fluid compartments happen (2 places for exchange)

Through the cell membrane or capillary wall

9

Explain sterlings law of the capillary.

Fluid moving in an out of the capillary through the use of hydrostatic and osmotic pressure

10

What drains the excess water that does not get re-absorbed by osmosis pressure.

The lymphatic system

11

Passive transport

No ATP requires, moves along a concentration gradient; driven by diffusion pressure

12

Simple diffusion

Moving molecules from an area with a high concentration to an area of low concentration

13

Osmosis
(must meet three criteria)

Water
Moving through selectively permeable membrane
Along concentration gradient (from an area of high water concentration to an area of low water concentration)

14

Is facilitated diffusion active or passive

Passive

15

Facilitated diffusion

When molecules diffuse down their concentration gradient with the help of carrier or facilitator proteins

16

Active transport

Uses carrier molecules to move solutes through membranes agains concentration gradients with the help of ATP

17

How do ions move between the interstitial space and intracellular space?

active transport (charged molecules)

18

How do nutrients, gases and waste move btw interstitial fluid and intracellular fluid.

diffusion

19

What is your regulation of fluid output and input controlled by?

Thirst mechanism
Antidiaretic hormone (ADH)
Renin-angiotensin-aldosterone system (RAAS)

20

Where does metabolic fluid come from?

the production of ATP

21

What is the main way to regulate fluids?

intake adjustment

22

Where is the thirst centre found?

hypothalamus

23

The Thirst center is stimulated by what 3 things?

Drop in saliva
Increase in blood osmolarity (solutes in blood)
Drop in blood volume

24

What starts the RAAS system?

Drop in blood pressure stimulate the kidneys to produce renin.

25

What are the two functions of angiotensin II?

1. Stimulate the adrenal cortex to produce aldosterone
2. Stimulate the hypothalamus to produce antidiuretic hormone

26

What does aldosterone do?

Causes renal reabsorption
(absorption of sodium and chloride which water follows)

27

What causes the RAAS system to stop?

The heart stretches and this stimulates it to release Atrial-Natuiretic Peptide (ANP)

28

When you consume too much salt what does this do to your blood pressure

Blood pressure increase
(this stimulates the production of ANP which decrease the production of renin, etc)

29

Edema

the accumulation of fluid in the interstitial space