D | Question 1 Which of the following variables affects the rate of diffusion? H

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D | Question 1 Which of the following variables affects the rate of diffusion? How many cells make up the respiratory organ ? The location of the respiratory tissue in the organism The distance between the two sides of gas exchange The difference in concentration gradient of the gas The area along which diffusion can occur D Question 2 What are the advantages of a closed circulatory system ? Blood moves at high pressure to the tissues It can circulate large amounts of oxygen rapidly O It is energy efficient It can be used for other purposes, such as movement Oxygenated and deoxygenated blood never mix

Explanation / Answer

The variable that affects the rate of diffusion is the difference in theconcentration gradient of the gas. As the gases will move from high to low concentration gradient.

Advantage of the closed circulatory system is that the blood moves at high pressure to the tissues and it is energy efficient and it can circulate large amounts of oxygen rapidly and the oxygenated and dexogenated blood never get mixed.

The advantage of an open circulatory system is that the open circulatory system can be used for other purposes like the movements. As the body moves the homolymph also moves.

Among the following options of the organisms that have an open circulatory system is the Insects ie the Arthropods. In these the blood circulates within the veasels and the body cavities as well.

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