Fluids Week 11 lecture

Question 1

How much of our body mass is made of H20

Answer 1

45-60%

Question 2

How much of a babies body is water?

Answer 2

70-80%

Question 3

What are the 2 compartments that organize water in our bodies?

Answer 3

Intracellular- 2/3rds water
* Cytosol inside cells
* Adipose tissue = H20 free- hydrophobic
*Muscle tissue= lots of water
Extracellular- 1/3rd water
*Intestinal fluid
*Plasma
* Lymph vessles - 3 liters

Question 4

Over 24 hours how much CSF leaves through ventricles

Answer 4

20L
17L returns to body
3L collects in Lymph system

Question 5

What are the 2 sources of water intake

Answer 5

Ingested - preformed H20

Metabolic water - made in body - 200L made by mitochondria

Question 6

How much water is consumed in drinks

How much water is consumed in food

Answer 6

1600mL consumed drinks

700mL consumed food

Question 7

How much water do we lose a day

Answer 7

2500ml

• 1500mL urine
• 500mL skin
• 300 mL respiration
• 200 mL feces

Question 8

What are the small particles in fluid called

Answer 8

Solutes

Question 9

What are the 2 main types of solutes

Answer 9

Non-electrolytes

Electrolytes

Question 10

What type of bonds are in non-electrolytes

Answer 10

Covalent - do not dissociate in h20

Question 11

What are the 2 most abundent types of non-electrolytes for homeostasis

Answer 11

1. Gluclose

2. Urea

Question 12

Describe osmosis

Answer 12

Osmosis is the movement of water or other solvent through a plasma membrane from a region of low solute concentration to a region of high solute concentration. Osmosis is passive transport, meaning it does not require energy to be applied.

Question 13

What is urea

Answer 13

related to protein use/ amino acids

Question 14

What type of bonds are in electrolytes

Answer 14

Ionic bonds- dissolve in h20

Question 15

What are the 3 types on Electrolytes

Answer 15

Acids
Bases
Salts

Question 16

Acids are electrolytes that…

Answer 16

give off hydrogen in H20 ex. HCl

Question 17

What is the difference between strong and weak acids

Answer 17

Strong acids - give off all H - cause durastic change in solution
Weak acids - do not give off all H

Question 18

0 on the pH scale means it is higher or lower in hydrogen concentration

Answer 18

Higher

Question 19

14 on the pH scale means it is higher or lower in the hydrogen concentration

Answer 19

Lower

Question 20

Bases are electrolytes that…

Answer 20

Give off OH- groups (Hydroxyl groups)

ex. KOH - potassium hydroxide

Question 21

Salts are electrolytes that…

Answer 21

Give off neither H or OH groups