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How does water move from the soil into plant roots?

The water moves into root hair cells by osmosis, as there is a high concentration of minerals/sugars in the cells, and little water. This decreases the water potential inside the cell, so water molecules ...

Answered by Timothy C. • Biology tutor

31632 Views

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...

Answered by Adam K. • Biology tutor

1732 Views

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

2265 Views

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

1618 Views

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

10082 Views