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At a neuromuscular junction, an impulse arrives, causing Ca²⁺ to be released from the sarcoplasmic reticulum of your muscle cell (a system of membrane bound organelles around m...

The cardiac cycle consists of two phases, diastole and systole.

Diastole is when the heart is relaxing, allowing blood to flow into the chambers from the vena cava on the right side and t...

PCR stands for polymerase chain reaction. It is a technique used very commonly in molecular biology. It is a way of replicating one strand of DNA into many copies that can then be studied. The components ...

So respiration is the means by which all cells produce energy, and this is done through aerobic or anaerobic respiration of glucose. Let's concentrate on animal cells first.

Anaerobic res...

A synapse acts as a junction between cells - either between neurons, or between a neuron and a muscle or gland cell.

Although neurons transmit information via electrical signals, synapses...