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How does an electrical impulse travel from one neuron to the next (IB-SL 6.5)?

The arrival of an action potential at the synaptic knob opens calcium ion channels in the pre-synaptic membrane and Ca++ flow in from the synaptic cleft 2. Ca++ cause vesicles of neurotransmitters t...

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Explain the main thermoregulatory processes in humans.

Thermoregulation involves both trying to increase and decrease our body temperature in order to maintain a temperature of 37 degrees celsius. Four main processes exist- convection,

Answered by Harvey W. • Biology tutor

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List five (5) risk factors for coronary heart disease, and briefly outline a piece of evidence for each one (5)?

(Chapter: further human physiology)
Factor + explanation (1 point for each) for coronary heart disease (CHD):-Genetics: CHD tends to run in some families-Age: CHD is a disease of old age-Gender: men...

Answered by Dimitrios K. • Biology tutor

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What is transcription?

Protein synthesis is the production of new proteins. This happens in two stages, transcription and translation
Transcription - forming mRNA from DNA
1) The DNA section to be co...

Answered by Rebecca H. • Biology tutor

10900 Views

How does osmoregulation occur in the kidney?

The tubule fluid enters the collecting duct (CD) where the final water reabsorption occurs before the fluid is excreted as urine. Osmoreceptors in the hypothalamus detect the concentration of the blood (w...

Answered by Kelly D. • Biology tutor

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