28 results found

Search Results for: sympathetic nervous system

Sympathetic nervous system

Definition noun A division of the (vertebrate) autonomic nervous system that is chiefly involved in producing an immediate... Read More

Parasympathetic nervous system

Definition noun A division of the (vertebrate) autonomic nervous system whose physiological effects are mostly in opposition... Read More

Ganglia

Ganglia Definition What are ganglia? To simply define ganglia in biology, it is the structure of an oval shape that... Read More

Ganglion

Ganglia Definition What are ganglia? To simply define ganglia in biology, it is the structure of an oval shape that... Read More

Nervous System

    THE is the most complicated and highly organized of the various systems which make up the human body. It is the... Read More

Peripheral nervous system

Definition noun The part of the nervous system that relays between the central nervous system and the rest of the body, and... Read More

Nervous system

Definition noun The organ system responsible mainly for coordination of bodily reactions, organ monitoring, and information... Read More

Central nervous system

Definition noun The part of the nervous system comprised of the brain, the brainstem, and the spinal cord Supplement In... Read More

The Central Nervous System

Myelin Sheath Myelin is a substance that forms the myelin sheath associated with nerve cells. This sheath is a layer of... Read More

Neural Control Mechanisms

Nerve cells called neurons generate electric signals that pass from one end of the cell to another and release chemical... Read More

Nervous

nervous 1. Possessing nerve; sinewy; strong; vigorous. Nervous arms. 2. Possessing or manifesting vigor of mind;... Read More

Circulation

Blood Blood is composed of a liquid, plasma, and blood cells such as erythrocytes (red blood cells,) leukocytes (white... Read More

Involuntary muscle

A muscle act typically either under the control of the will or without conscious control. Muscles that can be controlled at... Read More

Sympathetic hypertonia

sympathetic hypertonia Overfunction of the sympathetic nervous system, often experienced as... Read More

Sympathetic hormone

sympathetic hormone --> sympathin (Science: protein) A neurohormone, such asepinephrine, produced in response to... Read More

Chromaffin cell

Definition noun, plural: chromaffin cells Any of the cells (mostly found) in adrenal medulla and in other ganglia of the... Read More

Regulation of Organic Metabolism, Growth and Energy Balance

Organic Metabolism Events of Absorptive and Post-absorptive States. The absorptive state is the period during which... Read More

Digestion and Absorption of Food

The gastrointestinal (GI) system includes the gastrointestinal tract (mouth, pharynx, esophagus, stomach, small intestine,... Read More

Intrinsic sympathomimetic activity

Definition noun The property of a drug that produces partial agonist effect at the receptor similar to the cholinergic... Read More

Ejaculation

Definition noun (biology) The act of ejecting or expulsion, as of the expulsion of semen from the male genital tract in... Read More

Fight or flight reaction

Definition noun The response or reaction of an animal to a situation perceived as a threat to its survival, which involves... Read More

Muscle

Muscle cells are specialized to generate force and movement. There are three types of muscle tissue: (1) skeletal muscle,... Read More

White adipose tissue

Definition noun, plural: white adipose tissues A type of adipose tissue found in mammals used to store energy and acts as... Read More

Homeostasis

Homeostasis is the tendency not to stray from the range of favorable or ideal internal conditions. Such conditions must be... Read More

Amphotonia

Amphotonia Increased excitability of both the parasympathetic and sympathetic nervous systems. Origin: ampho-- g. Tonos,... Read More

Principles of Hormonal Control Systems

Hormones are chemical messengers that enter the blood directly upon their secretion from endocrine glands. A single gland or... Read More

Sensory Systems

A sensory system is a part of the nervous system consisting of sensory receptors that receive stimuli from the internal and... Read More

Lipogenesis

Definition noun The synthesis of lipid (fat) Supplement Lipogenesis is the process of producing lipid or fat. In biology,... Read More