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Year 10 Revision List

Biology 1
1. Nervous System and Endocrine System
Receptors
The Nervous System
Reflex Actions
Homeostasis
Hormones
The Menstrual Cycle
2. Diet and Exercise
Balanced Diet
Deficiency Diseases
Malnutrition
BMI
Obesity
Metabolic Rate
Cholesterol
Statins
Different Diets
3. Drugs
What are drugs?
A good medicine
Developing a…

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7. Evolution
Age of the Earth
How did life begin?
Theories of: Evolution, Natural Selection, Inheritence of Acquired
Characteristics
8. Human Impact on the Environment
The Greenhouse effect
Acid Rain
Eutrophication
Biodiversity
Pollution Indicators
Deforestation
Using up resources


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11.1Nervous System and Endocrine System

There are 2 types of control within the body:
1. The Nervous system [NERVOUS CONTROL].
2. By Hormones [HORMORNAL CONTROL].

RECEPTORS
SENSES ORGANS SENSITIVE TO...
Sight Eyes Light
Hearing Ears Sound/ Changes in position
Smell Nose Chemicals
Taste Tongue Chemicals
Touch Skin Temperature/ Pressure

THE…

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Salivation at Food Eyes Brain Salivary Salivate
the sight of Gland
food
Pupil Light Eyes Brain Iris Pupil
Constriction contracts

HOMEOSTASIS
MEANS: TO KEEP CONDITIONS INSIDE THE BODY CONSTANT. We have homeostasis
mechanisms to control the following things:
1. The Water content of the body
We lose water by sweating…

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THE MENSTRUAL CYCLE
There are four hormones involved in the control of the menstrual cycle:
1. Oestrogen
2. Progesterone
3. FSH [FOLICLE STIMULATING HORMONE]
4. LH [LUTEINISING HORMONE]
Oestrogen and progesterone are both produced by the ovaries. FSH and LH are both
produced by the piruitary gland in the brain.…

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The level of FSH IS HIGH during the first part of the cycle since its job is to cause the EGG
TO MATURE. The level of LH RISES RAPIDLY just BEFORE DAY 14 as its job is to
cause OVULATION.

OESTROGEN STIMULATES PRODUCTION OF LH.
OESTROGEN AND PROGESTERONE INHIBIT THE…

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11.2 Diet and Exercise

BALANCED DIETS
A balanced diet contains:
1. Carbohydrates
2. Proteins
3. Fats
4. Vitamins
5. Minerals
6. Fibre
7. Water

Carbohydrates:
There are 2 types:
1. Starch
2. Sugar

Starch ­ Bread, potatoes.
A long chain made up of glucose molecules. Therefore it is INSOLUBLE.
The…

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BODY MASS INDEX

BMI=Weight (Kg)
Height (M)2

An ideal BMI = 2025

OBESITY
Obesity can cause:
1. Breathlessness
2. Sweating
3. Tiredness
4. Back and Joint Pain

It is caused by:
1. Poor diet
2. Lack of exercise.

CHOLESTEROL
Is a type of fat that is used to make new…

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11.3 Drugs


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