Involuntary in Biological Definition

Albinism

... vision. They may have varying degrees of partial-sightedness ; either near-sighted or far-sighted . Most albinos suffer nystagmus (a rapid, involuntary "shaking" of the eyes) or stigmatism, though this and general vision often improves towards middle age , when most "normally" sighted individuals ...

Biomechanics

... (smooth - lacking striations) The stomach, vasculature, and most of the digestive tract are largely composed of smooth muscle. This muscle type is involuntary and is controlled by the enteric nervous system. Viscoelasticity Viscoelasticity is readily evident in many soft tissues, where there ...

Brain

... controls voluntary muscle movement, aided by feedback loops in the cerebellum and the basal ganglia . Nuclei in the brainstem control many involuntary muscle functions such as heartrate and breathing. Brains also produce hormones that can influence organs elsewhere in a body and brains react to ...

Eugenics

... inspiration. Almost all non-Catholic western nations adopted some eugenics legislation. In July 1933 , Britain passed a law allowing for the involuntary sterilization of "hereditary and incurable drunkards, sexual criminals, lunatics, and those suffering from an incurable disease which would be passed ...

Nervous system

... of the nervous system that coordinates a body's movements, such as maintaining a particular posture and walking. The autonomic nervous system is the involuntary part of the nervous system where all of the internal maintenance is taken care of. The autonomic nervous system is then divided into the ...