voluntary

Examples of voluntary in the following topics:

• Structure and Function of the Muscular System

  • Both voluntary and involuntary muscular system functions are controlled by the nervous system.
  • Muscle tissue can be classified functionally as voluntary or involuntary and morphologically as striated or non-striated.
  • Voluntary refers to whether the muscle is under conscious control, while striation refers to the presence of visible banding within myocytes caused by the organization of myofibrils to produce constant tension.
  • Skeletal muscle is under voluntary control, although this can be subconscious when maintaining posture or balance.
  • Skeletal muscle of the muscular system is closely associated with the skeletal system and acts to maintain posture and control voluntary movement.

• Contraception and Birth Control

  • Termination of an existing pregnancy can be spontaneous or voluntary.
  • Voluntary termination of a pregnancy is called an elective abortion.

• Neurons and Glial Cells

  • The nervous system coordinates the body's voluntary and involuntary actions and transmits signals between different parts of the body.
  • The PNS includes motor neurons (mediating voluntary movement), the autonomic nervous system (comprising the sympathetic nervous system and the parasympathetic nervous system, which regulate involuntary functions), and the enteric nervous system (a semi-independent part of the nervous system whose function is to control the gastrointestinal system).

• Muscle Tissues and Nervous Tissues

  • Skeletal muscle is under voluntary, somatic nervous system control and is found in the muscles that move bones.
  • Cardiac muscle is not under voluntary control, but is influenced by the autonomic nervous system to speed up or slow down the heart beat.

• Digestive System: Small and Large Intestines

  • Two sphincters between the rectum and anus control elimination: the inner sphincter is involuntary, while the outer sphincter is voluntary.