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Flashcards in Physiological solutions and fluid compartments Deck (22)
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1

Feedback system that  anticipates the body's needs

ex. Salivation before eating/ when smell a tasty yummy food

Feed-forward system

2

Feedback system that promotes change

ex. Oxytocin release and contractions during childbirth

Postive feedback

3

Feedback system that opposes change

ex. HPA axis

Negative Feedback system

4

It involves the impact of disease on processes and functions and the body's attempt to restore homeostasis

Pathophysiology

5

In a 70kg (154 lb) male:

TBW= total body water

ICF= intracellular fluid

ECF= extracellular fluid

TBW= 60% of body wt

TBW=.6 X body wt

ICF= 40% of body wt

ICF=.4 X body wt

ECF=20% of body wt

ECF= .2 X body wt

60-40-20 rule

60% of body wt is TBW

40% of body wt is ICF

20% of body wt is ECF

6

It's fluid contained w/in cells

it's 2/3rds of TBW

It's 40% of body wt

It's separated from the ECF by the cell membrane

ICF

7

It's the fluid outside the cells

It's 1/3rd of TBW

It's divided into 2 compartments: 1. interstitial fluid (ISF) and 2. Plasma

It's separated from the ICF by the cell membrane

ISF is separated from Plasma by the  capillary wall

ECF

8

It's the fluid that bathes the cells

It's the largest of the ECF subcompartments

It's 75% of ECF

ISF and lymph water are 15% of body wt

 

ISF

9

Common indicators to find total body water volume

Heavy water/ deuterium (D2O) and tritiated water (HTO)

10

Common indicators to find ECF volume

Impermeant ions, inulin (inert sugar), mannitol (inert sugar)

11

Common indicators to find plasma volume

Evans blue dye and radioiodinated albumin

12

How much water does avg. person drink per day?

A. 350 mL/day

B. 1000 mL/day

C. 1200 mL/day

D. 2550 mL/day

C. 1200mL.

Avg. person intakes 1200 mL/day of water

13

How much water does the avg. person consume in food per day?

A. 350 mL/day

B. 1000 mL/day

C. 1200 mL/day

D. 2550 mL/day

B. 1000 mL.

The avg. person consumes 1000 mL/day of water in food

14

How much metabolic water is produced per day by the avg. person?

A. 350 mL/day

B. 1000 mL/day

C. 1200 mL/day

D. 2550 mL/day

A. 350 mL/day

The avg. person produces 350mL of metabolic water/day

15

What is the total water intake for the avg. person?

Total water intake =Water drunk+water consumed in food+Metabolically produced water

A. 350 mL/day

B. 1000 mL/day

C. 1200 mL/day

D. 2550 mL/day

D. 2550 mL/day

The avg. person intakes 2550 mL of water per day.

=1200mL/day+1000mL/day+350mL/day

=2550 mL/day

16

How much body water is lost via insensible loss from the skin and lungs?

A. 50 mL/day

B. 100 mL/day

C. 900 mL/day

D. 1500 mL/day

E. 2550 mL/day

C. 900 mL/day

900 mL/day of water is lost via insensible loss

17

How much body water is lost via sweat?

A. 50 mL/day

B. 100 mL/day

C. 900 mL/day

D. 1500 mL/day

E. 2550 mL/day

A. 50 mL/day

50 mL of water per day are lost via sweat

18

How much body water is lost in feces per day?

A. 50 mL/day

B. 100 mL/day

C. 900 mL/day

D. 1500 mL/day

E. 2550 mL/day

B. 100 mL/day

100 mLof water is lost in feces

19

How much body water is lost in urine per day?

 

A. 50 mL/day

B. 100 mL/day

C. 900 mL/day

D. 1500 mL/day

E. 2550 mL/day

D. 1500 mL/day

1500 mL of water is lost per day in urine

20

What is the total fluid loss per day?

Total fluid loss= insensible loss+ sweat +feces+urine

A. 50 mL/day

B. 100 mL/day

C. 900 mL/day

D. 1500 mL/day

E. 2550 mL/day

E. 2550 mL/day

Total fluid loss is 2550 mL/day

Total fluid loss needs to equal total fluid intake to maintain water balance (homeostasis)

21

What separates ICF from ECF?

A. Plasma membranes of cells

B. capillary endothelium

C. None of the above

 

A. Plasma membranes of cells.

Plasma membranes of cells separates ICF from ECF

22

What separates ISF from Plasma?

A. Plasma membranes of cells

B. capillary endothelium

C. None of the above

B. Capillary endothelium.

Capillary endothelium separates ISF from plasma

1/4 ECF= ISF

3/4 ECF=plasma

ECF=ISF+plasma