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Describe the process of DNA replication.

DNA helicase unwinds the DNA double strand / causing hydrogen bonds between complimentary base pairs to break / both single strands used as templates / DNA replication is semi conservative and semi discontin...
LZ
Answered by Leia Z. • Biology tutor
3165 Views

Explain how the potential difference across the neuronal cell membrane changes during conduction of an action potential

Normal neuronal resting potential is around -70mV - this is maintained by sodium-potassium pumps. When the neuron is stimulated, sodium ion channels begin to open, allowing sodium ions to diffuse back into t...
MS
Answered by Melissa S. • Biology tutor
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Diabetes can damage the nervous system. Explain how this may alter the response of heart rate to changes in blood pressure.

Changes in blood pressure are measured by primarily by baroreceptors (pressure receptors) in the carotid body within the aorta, which send signals to the medulla in the brain. Damage to the autonomic nervous...
MC
Answered by Mostafa C. • Biology tutor
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What is the difference between mitosis and meiosis?

Meiosis is the process by which new gametes are formed in the testes and ovaries. Mitosis is the process by which all other cells of the body divide, for tissue growth and repair. One way of remembering this...
KL
Answered by Katy L. • Biology tutor
10252 Views

How do nerve impulses travel within a nerve cell?

The membrane of all nerve cells maintains a potential difference of -70mV by pumping positive Na+ ions out of the cell. This is called the resting potential. A nerve impulse is a change in this potential - a...
FW
Answered by Felix W. • Biology tutor
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