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Describe the synaptic transmission of a nerve impulse at the neuromuscular junction

As an action potential arrives at the presynaptic terminal, a depolarisation of the motor neuron membrane occurs which initiates the opening of voltage-gated Ca 2+ ion channels - releasing Ca 2+ into the neu...
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Answered by Adam B. • Biology tutor
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What are Stem Cells?

Stem cells are (pluripotent) undifferentiated cells that can differentiate into specialised cell types / tissues. Future medical uses involve growing organs from a patients OWN stem cells = zero chance of re...
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Answered by Sophie P. • Biology tutor
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Explain synaptic transmission at a cholinergic synapse.

A synapse is a gap between neurons that allows communication between different neurons using chemical messengers or neurotransmitters . Let's start simple and describe the basic structure of the synapse; it ...
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Answered by Maaz M. • Biology tutor
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Describe how the body maintains homeostasis when there is a drop in body temperature.

The body does this through the process of negative feedback. Thermoreceptors detect the decrease in temperature, and send a signal (via sensory neurones) to the temperature-regulating centre in hypothalamus....
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Answered by Mahima P. • Biology tutor
4040 Views

What does osmosis mean and what does the movement of water do to cells?

Osmosis can be defined as "the movement of water from an area of high water concentration to an area of low water concentration across a selectively permeable membrane". What this means, is that wa...
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Answered by Matilda T. • Biology tutor
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