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What is an action potential? When a stimulus of sufficient size is detected, it causes a temporary reversal of charges either side of the axon membrane. It also causes the channels in the axon memb...

If the concentration of glucose in the blood is too high, this is detected by beta cells in the pancreatic islets, which release the hormone insulin. Insulin has several ...

Once an irritating particle enters the trachea and stimulates a receptor a series of events take place. The resting membrane potential of a sensory neuron (usually mainta...

Recap: Atherosclerosis is a disease where damage to the endothelium causes LDL (bad) cholesterol deposits to accumulate in the damaged section of endothelial wall. As part of the b...

Meiosis concerns the division of cells within sexually reproducing organisms. It results in the formation of four daughter cells via meiosis I and meiosis II. These daughter nuclei are described as 'haplo...