Key term
CCEA AS-Level Nutrition and Food Science 3310
Protein
Fat
Carbohydrate
Vitamins
Minerals
Water and Other Fluids
Nutrition Through Life
Eating Patterns
Energy and Energy Balance
Overweight and Obesity
Cardiovascular Disease
Cancer
Type 2 Diabetes
Alcohol
Water and Other Fluids
- 4 subtopics
- 12 things to know
- AS 1
What Water and Other Fluids covers
Water and Other Fluids is examined in Unit AS 1, Principles of Nutrition — examined, compulsory. It covers functions and sources of water, nutritional benefits of other drinks, factors affecting hydration and dehydration and water intoxication.
Where it is assessed
AS 1
Principles of Nutrition — a written examination.
Check the CCEA specification ↗The 4 subtopics
Each one has its own page. CCEA AS Nutrition and Food Science students sit this topic in the first year.
- Functions and sources of waterWater as solvent, transport medium, coolant, lubricant and protector, its distribution in the body, sources including metabolic water, and daily fluid advice.Open →
- Nutritional benefits of other drinksMilk, fruit juice, smoothies, tea, coffee, sports drinks, oral rehydration solution, plant-based drinks, soft drinks and energy drinks compared.Open →
- Factors affecting hydrationThirst and antidiuretic hormone, urine colour, and how weather, activity, salt, protein, caffeine, alcohol, illness, age and body composition affect fluid needs.Open →
- Dehydration and water intoxicationThe signs, effects and treatment of dehydration and heat stroke, water intoxication and who is at risk, and a worked body mass loss calculation.Open →
What you need to know
Answer each one before you reveal it.
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Key term
A student drinks two cans of cola and a large glass of orange juice each day. Suggest healthier drinks and justify each choice.
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A builder works outdoors through a hot summer day. Discuss the factors affecting his hydration and how he can stay hydrated.
Numbers
What proportion of an adult's body mass is water?
Key term
Define dehydration.
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How is water distributed in the body?
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How does the body detect that it needs more water?
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What are the early signs of dehydration?
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Why is water described as the body's solvent?
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Why is milk a nutritious drink?
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What is the role of antidiuretic hormone in hydration?
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How does mild dehydration affect performance?
Take Water and Other Fluids further
The same content, four other ways.
Commonly confused
Pairs that lose marks when they are blurred together.
Dehydration vs Water intoxication
Dehydration: a state in which the body loses more fluid than it takes in. Water intoxication: a dangerous dilution of blood sodium from drinking too much too quickly.
Isotonic drink vs Hypotonic drink
Isotonic drink: a beverage with the same concentration of dissolved particles as body fluids. Hypotonic drink: a beverage more dilute than body fluids, absorbed fastest.
Intracellular fluid vs Extracellular fluid
Intracellular fluid: the body water held inside cells. Extracellular fluid: the body water outside cells, in blood plasma and between cells.
Questions from this topic
Each one with the model answer underneath.
- 1
What proportion of an adult's body mass is water?
Model answer
Water makes up about 60% of the body mass of an adult man. Women have a slightly lower proportion, because they carry more body fat.
- 2
How is water distributed in the body?
Model answer
About two-thirds of body water is inside cells as intracellular fluid. The remaining third is outside cells, in blood plasma and tissue fluid.
- 3
Why is water described as the body's solvent?
Model answer
Water dissolves nutrients, salts, gases and waste products. Most chemical reactions in the body take place in solution in water.
- 4
How does water act as a transport medium?
Model answer
Blood plasma is about 90% water. Plasma carries glucose, amino acids, hormones and carbon dioxide around the body.
- 5
How does water help to control body temperature?
Model answer
Sweat is produced when body temperature rises. Evaporation of sweat from the skin removes heat and cools the body.
- 6
How does water act as a lubricant?
Model answer
Water is the main component of synovial fluid, which lubricates the joints. Water in saliva and mucus moistens food for swallowing and helps it move along the gut.
What is inside Levo
Six ways to work the same material.
Water and Other Fluids revision questions
- Is Water and Other Fluids examined at AS in CCEA Nutrition and Food Science?
- Yes. It sits in AS 1, which you take in the first year, so it is on the AS paper as well as counting towards the full A level.
- What does Water and Other Fluids cover in CCEA AS-Level Nutrition and Food Science?
- 4 subtopics: functions and sources of water, nutritional benefits of other drinks, factors affecting hydration and dehydration and water intoxication. Each one has its own page with questions and model answers.
- How is Water and Other Fluids organised?
- By the CCEA 3310 specification, subtopic by subtopic, so it matches the order you are taught it in.
Every question in Water and Other Fluids, on a schedule.
Attempt a question from memory, write the correct version, then attempt it again. Levo records the jump between your first attempt and your last, and brings each question back on the day you are due to forget it.
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