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Why are gills in fish highly vascularized
b) Name an organism which has single circulatory system c) Name the opening to the chamber of the heart of an insect
a) State two ways in which heart muscles are special b) Name the muscles found in the following organs (i) stomach (ii) Bone
An individual is of blood group B positive. a) Name the antigens in the individual's blood b) Give the reason why the individual's cannot receive blood from a blood group A donor
The table provided shows the transportation of substances in the human body Name the substances represented by M, N and P
Explain three protective functions of mammalian blood
State the advantages of possessing blood group AB
State the differences between open and closed circulatory systems
What is the function of contractile vacuoles of amoeba?
a) Describe the condition known as varicose veins. b) What is the role of blood platelets in the clotting process
The diagram below shows blood circulation in a mammalian tissue. a) Name the part labeled P and Q. b) Name the substances that are: i) Required for respiration that move out of capillaries; ii) Removed from tissue cells as a result of respiration c) Name one component of the blood that is not found in the part labeled P.
Red blood cells are adapted to their function. Explain three ways in which they are adapted to their function.
Explain why it is not advisable to be in a poorly ventilated room with a burning charcoal stove
a) State three structural difference between arteries and veins in mammals. b) Name a disease that causes thickening and hardening of arteries
a) Name the antigens that determine human blood groups b) State the adaption that enables the red blood cells to move in the blood capillaries.
a) Name one defect of circulatory system in humans b) State three functions of blood other than transport
Why would carboxyhaemoglobin lead to death
The diagram below shows a vertical section through a mammalian heart. a) Name the parts labeled A, B, E and F. b) Give a reason why the wall of chamber C is thicker than chamber D
Distinguish between natural and acquired immunity
In what form is oxygen transported from the lungs to the tissues?
a) The type of circulatory system found in members of the class insecta is b) Name the blood vessel that transports blood from: i) Small intestines to the liver ii) Lungs to the heart
A person whose blood group is AB requires a blood transfusion. Name the blood groups of the donors
Why are people with blood group O universal donors?
a) How may excessive bleeding results in death? b) Name the process by which the human body naturally stops bleeding? c) How can low blood volume be brought back to normal?
Describe the path taken by carbon dioxide released from the tissue of an insect to the atmosphere.
State two ways by which Acquired Immuno deficiency syndrome (AIDS) virus is transmitted.
The diagram below shows a transverse section of a plant organ. a) Name the plant organ from which the section was obtained. b) i) Name the class to which the plant organ was obtained. ii) Give a reason for your answer in (b)(i) above
Why are the plants able to accumulate most of their waste products for long?
Below is an illustration of a cross section of a plant showing the transportation of substances in the plant a) Name the substances transported along the paths labeled K and L. b) Give a reason for your answer in L above.
State one adaptation of xylem vessels to their function.