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What's the difference between the cell wall and cell membrane?

The cell membrane is a semi-permeable structure that surrounds a cell and it is present in plant, animal and bacteria cells. It is semi-permeable because some substances such as glucose and water can pass th...
AK
Answered by Arabella K. • Biology tutor
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What kind of reaction is photosynthesis and what is it's product used for?

Photosynthesis is an endothermic reaction- energy is added (endo-in, exo-exit) H 2 O + CO 2 ==> C 6 H 12 O 6 + O 2 Photosynthesis is a process by which plants uptake water and carbon dioxide from their su...
BJ
Answered by Bart J. • Biology tutor
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Why the human heart is described as a "double pump" and what is the physiological significance of this?

The human heart is described as a double pump because blood passes through it and gets pumped out of it twice in a single circuit of the circulatory system. A normal heart is separated into two halves, right...
JF
Answered by James F. • Biology tutor
17092 Views

What is the function of the cell membrane?

It controls what enters and leaves the cell.
YA
Answered by Yemi A. • Biology tutor
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Describe what happens at a synapse in the human body. (6 marks)

Synapses are the junctions between neurons. An electrical impulse travels down the first neuron and arrives at the presynaptic membrane. The presence of an electrical impulse causes chemicals called neurotra...
EC
Answered by Emma C. • Biology tutor
11315 Views