Top answers

Explain the process of muscle contraction in a myofibril following nervous stimulation.

Muscle contraction can be explained using the 'Sliding Filament Hypothesis'. Following nervous stimulation, a nerve impulse will be transmitted to a neuromuscular junction. This will cause a release of the n...
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Answered by Lydia M. • Biology tutor
7883 Views

How does an invasive species cause negative effects on the biodiversity of an ecosystem?

Invasive species can cause negative effects on biodiversity through out-competing native species, becoming a voracious top predator and killing most of the native animals/fauna (especially since if there are...
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Answered by Susan B. • Biology tutor
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In answer section.

The polymerase chain reaction (PCR) is a process to 'amplify' DNA to provide sufficient quantities for further analysis. PCR involves repeated cycles of heating and cooling of the reaction mixture. A single ...
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Answered by James P. • Biology tutor
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Q: Give examples of how the human body maintains homeostasis when we exercise.

A: When we exercise the tissues of our body have an increased requirement for oxygen. The body facilitates this by increasing the respiratory and heart rate, thereby increasing the rate of gas exchange in th...
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Answered by Amy M. • Biology tutor
3543 Views

Explain the process of synaptic transmission (6 marks).

When the action potential reaches the pre-synaptic knob, voltage gated Ca 2+ channels open which allows Ca 2+ into the pre-synaptic knob - This causes vesicles which contain neurotransmitter such as acetylch...
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Answered by Dominic H. • Biology tutor
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