What Is an Effector?
Efferent nerve fiber ends or motor nerve endings and the muscles or glands that they control are collectively called effectors. This outgoing nerve fiber from the central nerve to the surroundings terminates in the smooth muscles or glands of the skeletal muscle or viscera and governs the activity of the muscles or glands.
- Chinese name
- Effector
- Foreign name
- effector
- Main ingredients
- Efferent nerve fiber endings or motor nerve endings
- Minor component
- The muscles or glands it governs
- Efferent nerve fiber ends or motor nerve endings and the muscles or glands that they control are collectively called effectors. This outgoing nerve fiber from the central nerve to the surroundings terminates in the smooth muscles or glands of the skeletal muscle or viscera and governs the activity of the muscles or glands.
Effector overview:
- Nerve center activities are transmitted through nerve fibers and eventually have an effect, such as muscles and secretory glands. The central excitement reaches the effector via the efferent nerve, causing it to perform corresponding activities, such as muscle contraction and glandular secretion.
Effector Anatomy
- It is the last link of the reflex arc. It is the peripheral device of the axon of the motor (effect) neuron. The nerve impulses transmitted from the center to the effector are transformed and transmitted to various organs, muscles or glands. The activity is expressed, so it is called an effector. Motor nerve endings distributed to skeletal muscle are called somatic motor nerve endings; motor nerve endings distributed to visceral are called visceral motor nerve endings. The contact point between the body motor nerve endings and muscle fibers is called the motorend-plate, which is composed of the motor nerve endings and the muscle fiber area in contact, also known as neuromuscular junction. The axon loses its myelin sheath before entering the motor end plate, and branches form some protrusions and attach to the sarcolemma. Here sarcoplasm is abundant, mitochondria and nucleus increase. Each myelinated fiber can control several or even thousands of muscle fibers. Visceral motor nerve endings are distributed in the visceral and vascular smooth muscle and glandular epithelial cells. The fibers are thin and unmyelinated. The peripheral branches are beaded or swollen, attached to smooth muscle fibers or pass between glandular cells.
- According to the distribution of nerve endings, it can be divided into somatic motor nerve endings and visceral motor nerve endings . Motor nerve endings are distributed to skeletal muscle fibers and closely adhere to the muscle fibers to form a motor end plate.
- Visceral motor nerve endings are distributed in the visceral smooth muscle and glandular epithelial cells. Nerve fibers are thin, without myelin, and the peripheral branches are plexiform; the ends swell into small nodules or buckles, which surround the muscle fibers or pass between glandular cells.
- The transmission of impulses from nerve endings to muscle fibers is accomplished by the release of chemical mediators (acetylcholine) from the bulk of the nerve fiber axon terminals, which acts on the myometrium through the fissure and causes the membrane to generate membrane potentials.
- The motor nerve endings and the muscles or glands they control are called effectors. The effector is part of a reflection arc. The reflex arc is divided into five parts: receptor, afferent nerve, nerve center, efferent nerve, and effector. If the effector is damaged, when the human body is exposed to external injuries or stimuli, the nerve center of the human cerebral cortex will feel the pain, but cannot make any action.