Air is drawn into and out of the tracheal system by muscular movement of the thoracic and abdominal walls. When the spiracle valves are open, air is drawn into the tracheal system and when the valves close air is forced along the system by the muscle movement. Oxygen diffuses into the cells while carbon dioxide diffuses out of the tissue cells into the fluid then into the tracheal system. The thoracic spiracle valves close as the abdominal spiracles open and gas is released out through the spiracles openings in the abdomen. In severe muscular activity, for example flight, lactic acid accumulates in the tissue. This raises the solute concentration of the tissue fluid drawing water out of the tracheas by osmosis.
Kinyita answered the question on February 11, 2018 at 07:30
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Describe the internal structure of the heart
(Solved)
Describe the internal structure of the heart.
Date posted:
February 11, 2018
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Answers (1)
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(Solved)
a) Name the process that results to formation of tissue fluid.
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Date posted:
February 10, 2018
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Answers (1)
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(Solved)
State the structural adaptations of veins to their function.
Date posted:
February 10, 2018
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Answers (1)
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State two structural adaptations of veins to their function.
(Solved)
State two structural adaptations of veins to their function.
Date posted:
February 10, 2018
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Answers (1)
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(a)Name two cardiovascular diseases. (b)If the nerve supply to the heart of a mammal is severed the rhythmic heart contraction and relaxation will go on and...
(Solved)
a)Name two cardiovascular diseases.
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Date posted:
February 10, 2018
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Answers (1)
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(Solved)
Differentiate between gaseous exchange and ventilation.
Date posted:
February 10, 2018
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Answers (1)
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(Solved)
State one adaptation of the following parts of mammalian eye.
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(ii) Sclera.
(iii) Cilliary body.
Date posted:
February 10, 2018
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Answers (1)
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(Solved)
List down the roles of lipids in the body.
Date posted:
February 10, 2018
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Answers (1)
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(Solved)
Give five functions of peptides
Date posted:
February 10, 2018
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Answers (1)
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(Solved)
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Date posted:
February 9, 2018
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Answers (1)
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(Solved)
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Date posted:
February 8, 2018
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Answers (1)
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(Solved)
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Date posted:
February 8, 2018
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Answers (1)
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(Solved)
Name three supportive tissues in plants.
Date posted:
February 6, 2018
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Answers (1)
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(Solved)
State two adaptations of Guard cell to its function in plant tissue.
Date posted:
February 6, 2018
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(Solved)
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Date posted:
February 6, 2018
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Date posted:
February 6, 2018
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(Solved)
Describe Amitosis as a type of cell division.
Date posted:
February 2, 2018
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(Solved)
Define the term Genomic imprinting.
Date posted:
February 2, 2018
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(Solved)
Define the term incomplete dominance.
Date posted:
February 1, 2018
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(Solved)
Outline eight means of asexual reproduction in organisms.
Date posted:
February 1, 2018
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Answers (1)