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Biology
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Draw the structure of a cell membrane (6 marks).

I would draw a diagram showing the structure of a cell membrane and explain each of the parts:The cell membrane is composed of a phospholipid bilayer which is composed of a hydrophilic head and a hydropho...

PM
Answered by Pravir M. Biology tutor
2065 Views

How is immunity reached after a vaccine is given? Include the roles of both T cells and B cells.

The vaccine contains either dead or attenuated pathogens, or they can contain just antigens from the pathogen. When one is injected with a vaccine the white blood cells within the body are able to recogni...

CL
Answered by Chizara L. Biology tutor
2182 Views

what is the site of gas exchange in the lungs

the alveoli (air sacs that follow from the bronchioles)

SE
Answered by Sito E. Biology tutor
1960 Views

Describe the cardiac cycle in the human heart

The human heart beats around 60-100 beats per minute. Blood enters the right atrium via the superior vena cava and the inferior vena cava, the blood moves through the tricuspid valve into the right ventri...

SD
Answered by Shane D. Biology tutor
1878 Views

What are the main components of blood and explain their functions.

Blood consists of cells such as red blood cells, white bloods cells and platelets and plasma. Red blood cells are important for the delivery of oxygen to the cells in the body - to enable...

SM
Answered by Shivani M. Biology tutor
2475 Views

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