When a receptor is stimulated, it sends a signal along the nerve cells (called neurones) to the central nervous system. (See diagram to the left.) Usually, the brain – which is part of the nervous system – coordinates a response. An effector is any part of the body that produces the response.
What is an example of a reflex action?
Reflex actionStimulusReceptorsPupil reflexLight intensityRods and conesKnee jerkTapping patellar tendonProprioceptors/ . tendon stretch receptorsSweatingIncreased body temperatureThermoreceptorsCoughing and sneezing.Irritant material on mucosa of airwaysChemoreceptors
What is an example of a cranial reflex?
Other spinal reflexes involve more than one synapse (see polysynaptic reflex); an example is the withdrawal reflex of the hand from a painful stimulus (such as fire). Cranial reflexes are mediated by pathways in the cranial nerves and brain; examples are the blinking and swallowing reflexes. See also conditioning.
What is the effector organs?
effector (plural effectors) (biology) Any muscle, organ etc. that can respond to a stimulus from a nerve. (biology) The part of a nerve that carries a stimulus to a muscle etc.
Are effectors muscles?
Effector organs carry out the body’s responses to stimuli. Effectors in multicellular organisms are either glands or muscles. Stimuli will bring about a response from a muscle or gland. A nerve impulse may cause a muscle to contract.
What tissue is in the effector?
1. As defined by Sherrington, a peripheral tissue that receives nerve impulses and reacts by muscular contractioon, glandular secretion, or electric discharge (from an electric organ, as in the case of certain bony fishes such as the electric eel). 2.
What are the effectors in the body?
When a receptor is stimulated, it sends a signal along the nerve cells (called neurones) to the central nervous system. (See diagram to the left.) Usually, the brain – which is part of the nervous system – coordinates a response. Effectors. An effector is any part of the body that produces the response.
What is an effector molecule?
In biochemistry, an effector molecule is usually a small molecule that selectively binds to a protein and regulates its biological activity. In this manner, effector molecules act as ligands that can increase or decrease enzyme activity, gene expression, or cell signaling.
What are effectors and what do they do?
The nervous system allows the body to respond, through effectors, to changes in the environment detected by receptors. The process involves neurones and is usually coordinated by the brain. A reflex action is an extra-rapid response to a stimulus: this process also involves the nervous system but it bypasses the brain.
What is the definition of effector in biology?
effector. noun. A muscle, gland, or organ capable of responding to a stimulus, especially a nerve impulse. A nerve ending that carries impulses to a muscle, gland, or organ and activates muscle contraction or glandular secretion.
What are the effectors of the somatic nervous system?
The motor neurons (efferent neurons) conduct impulses out to the skeletal muscles (effectors), which produce required response movements. Somatic motor neurons are also covered by a series of Schwann cells because the muscle actions need to be coordinated and rapid.
What are the effectors of the autonomic nervous system?
Autonomic effectors are smooth muscle, cardiac muscle and glands. ? Efferent pathways: the somatic extends its axons from cell bodies (which are located in the CNS) to the effectors. The autonomic axons from the CNS synapse in the PNS’s ganglia.
What is the job of the nervous system?
Jobs of the nervous system. It receives sensory impulses from the sensory organs through sensory nerve fibers, analyzes and interprets this information and starts the motor impulses which are carried to muscles and glands which act on these impulses and cause the body to react.
What is the response in the nervous system?
A nervous system can be defined as an organized group of cells, called neurons, specialized for the conduction of an impulse—an excited state—from a sensory receptor through a nerve network to an effector, the site at which the response occurs.
What is the difference between the sympathetic and parasympathetic nervous systems?
The sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. The parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.
What would be an effector in anatomy?
effector. (ĭ-fĕk′t?r) n. A muscle, gland, or organ capable of responding to a stimulus, especially a nerve impulse. A nerve ending that carries impulses to a muscle, gland, or organ and activates muscle contraction or glandular secretion.
What tissue is the effector in the nervous system?
Nerve cells (neurons) carry the message from the stimulated receptors to the correct effectors. A sensory neuron carries the message from the receptor to the central nervous system (the spinal cord and brain). A motor neuron carries the message from the central nervous system to the effector.
What is the role of the central nervous system?
The central nervous system (CNS) controls most functions of the body and mind. It consists of two parts: the brain and the spinal cord. The brain is the center of our thoughts, the interpreter of our external environment, and the origin of control over body movement.
How is information transmitted in the nervous system?
They connect sense receptors to the central nervous system and also connect one part of the nervous system to another, for example in the brain and spine. They also carry signals from the nervous system to effector organs, such as muscles and glands. When neurons are stimulated they transmit an electrical impulse.
What are effector cells in the immune system?
Effector cells are the relatively short-lived activated cells that defend the body in an immune response. Effector B cells are called plasma cells and secrete antibodies, and activated T cells include cytotoxic T cells and helper T cells, which carry…
Where are the receptors located?
Receptors are groups of specialised cells. They can detect changes (stimuli) in the environment. Receptors are often located in the sense organs, such as the ear, eye and skin. Each organ has receptors sensitive to particular kinds of stimulus.
Which term below is another name for the autonomic nervous system?
What is another name for the Somatic nervous system? Autonomic nervous system is involuntary, the somatic nervous system is voluntary. The Autonomic nervous system is light myelinated or unmyelinated, conduction is much slower, the effectors of the ANS are smooth, cardiac, and glands.
What is an example of a reflex?
Monosynaptic means there is only one neuron involved each way on the path to the spinal cord (called an afferent or sensory neuron) and one away from the spinal cord (called an efferent or motor neuron). An example of a monosynaptic reflex is the patellar (knee jerk) reflex.