An angle is the space between two lines that start at the same point. Angles are measured in degrees (°). They can measure between 0° and 360°. Different types of angles include acute, obtuse, reflex ...

A voluntary action is a motor act, the occurrence, form and timing of which are generated internally rather than by an immediate external stimulus. Voluntary actions involve a characteristic network ...

Stimuli are changes in our environment that we respond to and are detected by receptors. Different receptors are sensitive to different stimuli (eg receptors in the eye are sensitive to light). A ...

The fight, flight, freeze, or fawn response refers to involuntary physiological changes that happen in the body and mind when a person feels threatened. It can cause rapid breathing, flushed skin, ...