Top answers

Biology
A Level

List the phases of mitosis in order, and give a brief explanation of each phase.

An easy way to remember the stages of mitosis is- preparation may achieve the impossible Prophase-preparationMetaphase-mayAnaphase-achieveTelophase-theInterphase-impossible. Prophaseis the first phase, wh...

Answered by Alex M. Biology tutor
3555 Views

Describe how glucose is transported into epithelial cells in the ileum

Na+ ions are actively transported out of the epithelial cell into the blood by an Na+ pump. This requires ATP. This establishes a concentration gradient of Na+, with a high Na+ concentration in the ileum ...

Answered by Will L. Biology tutor
7087 Views

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 discon...

Answered by Leia Z. Biology tutor
2341 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 int...

Answered by Melissa S. Biology tutor
5235 Views

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 nerv...

Answered by Mostafa C. Biology tutor
2215 Views

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