Lecture 11 - Water and Electrolytes Flashcards Preview

Food and Nutrition 1030 > Lecture 11 - Water and Electrolytes > Flashcards

Flashcards in Lecture 11 - Water and Electrolytes Deck (50)
Loading flashcards...
1

Who has the most water in the body?

Children 65%
Adults 60%
Seniors 55%

2

Where does most water reside in the body?

3/4 lean tissue
< 1/4 fat tissue

3

What groups have the smallest portion of water?

Females
Obese individuals
Elderly

4

Why do females have less water than males?

Females have more fat around the hips and thighs. Fat carries less water. Males typically have less fat and more lean muscle which has higher water content

5

What are some of waters body functions?

-Carries nutrient and waste
-Maintains structures of large molecules
-Metabolic reactions
-Solvent
-Lubricant
-Temp regulation
-Maintains blood volume

6

What is the difference between Extracellular fluid, intracellular fluid and interstitial fluid?

Extra: outs of the cell (including inter)

Inter: between cells

Intra: within cell

7

What is the AI for men and women for total water?

Men: 3.7L/day

Women: 2.7L/day

-both include food and liquids

8

What controls water intake?

The hypothalamus
-recognizes concentrated blood and signals thirst
-recognizes distention of stomach and decreases thirst

9

What is the first and second signs of dehydration?

1- Thirst
2-Weaknes, exhaustion, delirium

10

What are the symptoms of water intoxication?

Confusion, convulsions, death
Hyponatremia

11

What is hyponatremia?

Low Na levels in the blood

12

What happens when cells are thirsty?

Water from the blood goes to the cells, concentrating the blood. This also constricts blood vessels everywhere, when this happens around the mouth no saliva is produced

13

Where do we lose water from and in what order in terms of L?

Kidneys
Skin
Lungs
GI

14

What is the amount of water we have to lose and why?

500ml has to be lost for waste excretion

15

What is insensible water loss?

Water we don't think of losing
-from skin and lungs

16

What is the difference between hard and soft water?

Hard --> Higher in Ca

Soft--> Higher in Na

17

What are some health effects of water?

Meet body fluid needs
Protect against urinary stones and constipation

18

What is the fluid balance of cells?

2/3 fluid inside the cell
1/3 outside

19

How do you control the movement of water?

Cant control the movement of water but we use electrolytes to control the water movement
-electrolytes attract water

20

What are the 3 Kidney hormones?

Antidiuretic hormone
Renin
Angiotensen

21

What does ADH do?

Prevents you from losing water, stimulates kidneys reabsorption of water

22

What does renin do?

Tells kidneys to bring back Na into the body

23

What does angiotensin do?

Constricts blood vessels

24

What us used in the kidneys and GI to regulate electrolyte balance?

The Na/K pump
-3 Na out
-2 K in

25

What causes fluid and electrolyte imbalances?

-Prolonged vomiting or diarrhea
-Heavy sweating
-Burns and traumatic wounds
-Meds

26

How does water regulate the acid-base balance int he body?

Helps to maintain the # of H+ ions
-kidneys and lungs do this too

27

What is a normal pH range?

7.35-7.45

28

What common form of Na do we consume?

Sodium Chloride (NaCl)
-used to preserve and enhance taste. *but not always in the form of NaCla

29

Which is worse, Na or salt?

Salt is worse in terms of the side effects

30

What is Sodium used for?

Fluid balance
Acid base balance
Nerve transmission
Muscle Contraction