gcses biology....paper 1( section 2)

how to prepare for paper one.....(section 2)

hello everybody hope u are doing great....lets continue

LETS BEGIN

1: Now you should make yourself very much clear with the concept of how liver regulates the blood glucose concentration.

2:You should know that temperature, carbon dioxide concentration and light intensity are the limiting factors of photosynthesis

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3:You should know that plants make up their own proteins by the reaction between nitrates and the glucose produced in Green Leaves.

4:You should know that in phloem there is always sucrose present because that is the transport form of sugar in plants.

5:You should know that blood is a tissue

6:You should know that the protective mechanism of human body consists of three processes phagocytosis, antibody production and blood clotting.

7:As veins draw blood against gravity there are two main forces that  push Blood upwards towards heart those are skeletal muscles by the sides of veins and valves present inside veins.

8:You should know that hepatic portal vein is the only vein  having capillaries at both ends.

9;Make yourself 

clear with the labelling of heart because they mostly ask it.

10:You should know that atherosclerosis is a heart disease in which there is fatty acid deposited on the walls of  blood vessels of heart.

11:You should know that thrombosis is a heart disease in which there is blood clot deposited inside the blood vessels of heart.

12: The most frequently asked question is which muscle takes glucose to liver? then you should write heptic portal vein

13: you should know that the highest blood pressure is found in a aorta.

14:You should know that Pulmonary artery is the only artry containing deoxygenated blood and Pulmonary vein is the only vein containing oxygenated blood apart from the umbilical cord.

15:You should know that lymph is formed at the arterial end of capillaries and this question has come many times.

16:Xylem vessel has two functions 1 is to transport water from Roots to upper parts and the other is to provide mechanical support

because it contains Lignin.

17: phloem has 

degenerated Protoplasm thus it has companion cells to keep it alive.

18:make urself well aware of the labelling of a dicotyledonous stem and a dicotyledonous root.

19: aphids are Involved in translocation studies and translocation is transport of food through phloem.

20:You should know that uptake of water from Roots to leaves takes place by three forces one is root pressure other is capillary action consisting of adhesion and Cohesion forces and the main force is transpiration pull.

21:Make sure you know what  transpitation is.

22:Transpiration is affected by humidity. temperature,strong wind and light.

23:Wilting has advantage that it reduces heat loss of plant and it has disadvantage that it reduces photosynthesis of plant.

24:They are two types of respiration aerobic and anaerobic in aerobic respiration there is presence of oxygen that breaks down glucose and large amount of energy is released .where as in anaerobic respiration there is absence of Oxygen and small amount of energy is released.

25: the equation for anaerobic respiration stays the same but for anaerobic respiration you should be aware of the equation that takes place in yeast and in man as well .

26:You should know that when and anaerobic respiration takes place in humans ,there is lactic acid formed that causes fatigue because of oxygen depth.

27:Make yourself a well aware of the mechanism of inspiration and expiration as they are usually asked.

28: crame the labelling of gaseous exchange system in men .

29:function of mucus is to trap dust.

30:Function of cilia hair in trachea is to push mucus containing dust outwards.

31:Alveoli increase surface area  to volume ratio of lungs.

32:Carbon dioxide is transported through Plasma in the form of bicarbonate ions in blood.

33:You should know difference in composition of inspired and expired air .

34:the stimulus for breathing is carbon dioxide.

35:Crame labelling of urinary system of man.

36:You should know the definition of excretion.

37:Make yourself well aware of how dialysis takes place and the labelling of Dialysis machine.

38:Cram the labelling of skin.

39:You should know the mechanism that takes place when body needs to drop its temperature and when it needs to rise its temperature.

TIRED?......OK LETS DISCUSS THE REST IN OUR OTHER TWO SECTIONS......BYE.