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What are the functions of the substances in the blood?

The blood is an amazing way to deliver all kinds of important and interesting materials around our body to the organs and tissues that need it the most and is efficient in removing harmful substances from th...
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What are the functions of the substances in the blood?

The blood is an amazing way to deliver all kinds of important and interesting materials around our body to the organs and tissues that need it the most and is efficient in removing harmful substances from th...
Answered by • Biology tutor
3292 Views

Outline the importance of photosynthetic pigments in photosynthesis

Photosynthetic pigments are found in certain proteins and absorb photons (waves of light) at particular wavelengths. This absorbance causes electrons in the pigments to become excited and they increase in en...
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Explain why glucose is needed for the contraction of skeletal muscle.

Skeletal muscle use glucose in glycolysis to generate ATP, the energy currency of the cell. ATP binds the myosin head in skeletal muscle to displace actin (a protein bound as part of the muscle contraction c...
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Draw a diagram showing a normal iris and what happens to the iris when a light in shined into the human eye. (1 mark). What causes this to happen? (2 marks)

(Any diagram showing an iris that has constricted) 1 mark In high light levels (1 mark) Accept reflex action due to increased photoreceptor action or words to that effect circular muscles relax and radial mu...
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Answered by James P. • Biology tutor
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