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Phagocytes detects pathogen due to chemical produced by the pathogen. The phagocyte move via a concentration gradient to the pathogen. The phagocyte engulfs the pathogen thereby producing a phagosome wher...

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...