- Always moist to dissolve gases hence diffuse in solution form
-Thin walled/ epithelium which is one cell thick to reduce the distance of diffusing molecules
-Have a large surface area for maximum exchange of gases
- Must be permeable occurs in two stages:
johnmulu answered the question on May 4, 2017 at 04:47
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a) Name two structures for gaseous exchange in aquatic plants (b) What is the effect of contraction of the diaphragm muscles during breathing in mammals?
(Solved)
a) Name two structures for gaseous exchange in aquatic plants
b) What is the effect of contraction of the diaphragm muscles during breathing in mammals?
Date posted:
May 3, 2017
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Answers (1)
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State four ways in which respiratory surfaces are suited to their function
(Solved)
State four ways in which respiratory surfaces are suited to their function
Date posted:
May 3, 2017
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Answers (1)
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State two ways in which floating leaves of aquatic plants are adapted to gaseous exchange.
(Solved)
State two ways in which floating leaves of aquatic plants are adapted to gaseous exchange.
Date posted:
May 3, 2017
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Answers (1)
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The diagram below represents a part of the rib cage.
(Solved)
The diagram below represents a part of the rib cage.
(a) Name the parts labeled W, Y and Z.
b) How does the part labeled Z facilitate breathing in?
Date posted:
May 3, 2017
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Answers (1)
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The diagram below shows gaseous exchange tissues
(Solved)
The diagram below shows gaseous exchange tissues
(a) Name the gas that diffuses:
(i) To the body cells
(ii) From the body cells
b) Which compound dissociate to release the gas named (a) (i) above
c) Name the blood vessel with the highest concentration of:
i) Glucose
ii) Carbon (IV) oxide
Date posted:
May 3, 2017
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Answers (1)
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Name two gaseous exchange structures in higher plants.
(Solved)
Name two gaseous exchange structures in higher plants.
Date posted:
May 3, 2017
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Answers (1)
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Name three sites where gaseous exchange take place in terrestrial plants.
(Solved)
Name three sites where gaseous exchange take place in terrestrial plants.
Date posted:
May 3, 2017
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Answers (1)
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Why are gills in fish highly vascularized
(Solved)
Why are gills in fish highly vascularized
Date posted:
May 3, 2017
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Answers (1)
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a) What is a single circulatory system(b) Name an organism which has single circulatory system(c) Name the opening to the chamber of the heart of an insect
(Solved)
b) Name an organism which has single circulatory system
c) Name the opening to the chamber of the heart of an insect
Date posted:
May 3, 2017
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Answers (1)
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a) State two ways in which heart muscles are special (b) Name the muscles found in the following organs (i) stomach (ii) Bone
(Solved)
a) State two ways in which heart muscles are special
b) Name the muscles found in the following organs (i) stomach (ii) Bone
Date posted:
May 3, 2017
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Answers (1)
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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
(Solved)
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
Date posted:
May 3, 2017
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Answers (1)
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The table provided shows the transportation of substances in the human body
(Solved)
The table provided shows the transportation of substances in the human body
Name the substances represented by M, N and P
Date posted:
May 3, 2017
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Answers (1)
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Explain three protective functions of mammalian blood
(Solved)
Explain three protective functions of mammalian blood
Date posted:
May 3, 2017
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Answers (1)
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State the advantages of possessing blood group AB
(Solved)
State the advantages of possessing blood group AB
Date posted:
May 3, 2017
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Answers (1)
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State the differences between open and closed circulatory systems
(Solved)
State the differences between open and closed circulatory systems
Date posted:
May 3, 2017
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Answers (1)
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What is the function of contractile vacuoles of amoeba?
(Solved)
What is the function of contractile vacuoles of amoeba?
Date posted:
May 3, 2017
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Answers (1)
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a) Describe the condition known as varicose veins.(b) What is the role of blood platelets in the clotting process
(Solved)
a) Describe the condition known as varicose veins.
b) What is the role of blood platelets in the clotting process
Date posted:
May 3, 2017
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Answers (1)
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The diagram below shows blood circulation in a mammalian tissue.
(Solved)
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.
Date posted:
May 3, 2017
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Answers (1)
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Explain three ways in which red blood cells are adapted to their function.
(Solved)
Red blood cells are adapted to their function. Explain three ways in which they are adapted to their function.
Date posted:
May 3, 2017
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Answers (1)
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Explain why it is not advisable to be in a poorly ventilated room with a burning charcoal stove
(Solved)
Explain why it is not advisable to be in a poorly ventilated room with a burning charcoal stove
Date posted:
May 3, 2017
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Answers (1)