Code Breaker

Instructions: Use the numbers in the code breaker to decode the message

Code Breaker

Instructions: Use the numbers in the code breaker to decode the message

Code Breaker

Instructions: Use the numbers in the code breaker to decode the message

A human heart is about the size of an orange. It pumps 5 litres of blood around the body.

A persons balanced diet depends on their age, gender and how active they are.

A disease causing microorganism is called a pathogen. There are four main types of pathogen.

There are two types of vision, binocular and monocular. Humans have binocular vision.

Harmful drugs change how you behave and feel. They damage your health.

Various body systems keep the levels of oxygen, water and temperature constant. This is called homeostasis.

Plants as well as animals respond to changes in their environment

Our different characteristics can be inherited from our parents or controlled by the environment.

1 MARK SCHEME 6 Marks

Marks awarded for this answer will be determined by the standard of the scientific response as well as the Quality of Written Communication (QWC). There are no discrete marks for the assessment of written communication but QWC will be one of the criteria used to assign the answer to an appropriate level.

There is a clear and detailed description of the steps involved in a reflex action. Relevant examples of receptor cells and effectors are stated. The answer shows almost faultless spelling, punctuation and grammar. It is coherent and in an organised, logical sequence. It contains a range of appropriate or relevant specialist terms used accurately.

There is a description of some of the stages involved in a reflex action. There are some errors in spelling, punctuation and grammar. The answer has some structure and organisation. The use of specialist terms has been attempted, but not always accurately.

There is a brief description of at least one stage involved in a reflex action. The spelling, punctuation and grammar are very weak. The answer is poorly organised with almost no specialist terms and/or their use demonstrating a general lack of understanding of their meaning.

No relevant content.

Examples of biology points

Stages in a reflex action:

Change in the environment/stimuli detected by receptors – examples include light, sound, taste, pressure, pain and temperature receptors

Information passes along nerves (as electrical impulses)

Impulse travels along a sensory neurone to the CNS

Impulse travels along a relay neurone within the CNS

Impulse travels from the CNS along a motor neurone

Information passes from a motor neurone to an effector – examples include muscles and glands

Synapses are the gaps between neurones – a chemical is released to transfer the information to the next neurone

5–6

3–4

1–2

0

The effector responds with an appropriate action (e.g. muscle contracts)

When we exercise our bodies heat up. The more you exercise the more you sweat. Sweat comes from sweat glands in your skin. The water in the sweat evaporates it uses heat from the skin to change from a liquid into a gas. Therefore the sweat cools the skin, and the blood flowing through it, when it evaporates.Hypothermia A condition that occurs when the someone’s temperature falls too low for a long timeDehydration A condition caused by too much water lossHeatstroke A condition caused by hot weather, when sweating is ineffectiveSweating A method of reducing body temperature. Happens during exercise.Shivering A method of increasing body temperature when too cold.Evaporates Sweat cools the skin when it ___________Death If your body temperature drops below 25’c it will result in this.Thermometer A device used to measures someone’s temperature