Other factors including diet, stress and life situations may have a profound effect on both physical and mental health. You should be able to describe the nature of enzyme molecules and relate their activity to temperature and pH changes.
Never complete the full course of antibiotics prescribed by a doctor Take antibiotics at every opportunity possible, even for a viral infection Only take when really needed, complete the full course and use less in agriculture Check score. Health is the state of physical and mental wellbeing.
Platelets are fragments of cells which initiate the clotting process at wound sites. Knowledge of the blood vessels associated with the heart is limited to the aorta, vena cava, pulmonary artery, pulmonary vein and coronary arteries.
Why would you want to continue to stress and feel frustrated when you can let us take care of the hassle for you. You should have investigated the effect of pH on the rate of reaction of amylase enzyme by using a continuous sampling technique to determine the time taken to completely digest a starch solution at a range of pH values.
Without active transport, sufficient food for the organism may not be absorbed from the gut. Different types of disease may interact e. The left ventricle pumps blood around the rest of the body. Active transport allows mineral ions to be absorbed into plant root hairs from very dilute solutions in the soil.
The digestive system is an example of an organ system in which several organs work together to digest and absorb food. Be able to calculate and compare surface area to volume ratios. Although there has been huge progress in surgical techniques, especially with regard to coronary heart disease, many interventions would not be necessary if individuals reduced their risks through improved diet and lifestyle.
You also need to understand the principles of sampling as applied to scientific data, including epidemiological data. Inserted stents are used to keep the coronary arteries open.
You should be able to relate the action of enzymes to metabolism. Be able to discuss and explain the human and financial cost of these non-communicable diseases to an individual, a local community, a nation or globally. Know that the natural resting heart rate is controlled by a group of cells located in the right atrium that act as a pacemaker.
Organs are aggregations of tissues performing specific functions. Appreciate that large molecules cannot pass through the membrane. A bad grade could mean that you do not graduate. Revise the investigation into the effect of antiseptics or antibiotics on bacterial growth using agar plates and measuring zones of inhibition.
Be able to recognise, draw and interpret diagrams that model diffusion. Your knowledge should be limited to epidermis, palisade and spongy mesophyll, xylem and phloem and guard cells surrounding stomata.
Also revise 1 The use qualitative reagents to test for a range of foods e. As not all fossils have been found, they may have been damaged, or conditions may have prevented them from being created People sell fossils they have found Fossils take a long time to form 8 Why do animals become extinct.
Know that meristem tissue in plants can differentiate into any type of plant cell, throughout the life of the plant. Nov 25, · This tutorial can be used for any GCSE specification. It covers the basics of the circulatory system. Includes: Structure and function of the Arteries, Veins and Capillaries.
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