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It is important to first understand the concept of respiration. It is not the same as ventilation (breathing), as respiration is a chemical process that involves the breakdown of basic chemical molecul...

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...

Homeostasis refers to the processes that occur in our bodies to maintain various factors at set values. An example of this is control of body temperature. For example, if the temperature is too high, we b...

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 ...