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A reflex action is an automatic (involuntary) and rapid response to a stimulus, which minimises any damage to the body from potentially harmful conditions, such as touching something hot.
- Synapses
Reflex arc; Synapses; Investigating reflex actions; Synapses...
- Responding to Changes in Environment
Cells called receptors close receptors Organs which...
- Synapses
- Stimulus
- Receptor
- Sensory Neuron
- Motor Neuron
- Interneuron
- Effector
It is any change in the environment (internal or external) detected by a receptor. It initiates a response known as the reflex. It can be anything like a heat or cold sensation, an electronshock, and touching a sharp object.
It detects the stimulus and transmits the nerve impulses to the brain for decision-making. They can be of different shapes based on their origin, such as pain receptors (having free nerve endings), thermoreceptors (containing specialized heat and cold receptors), and mechanoreceptors (having specialized muscle endings like muscle spindle).
Also known as afferent neurons, they bring the impulse from the receptor to the central nervous system (CNS) – the brain and spinal cord. It thus functions as a messenger. In higher animals, most sensory neurons enter the spinal cord using the dorsal root and synapse with a relay neuronin the grey matter instead of passing the information directly ...
These neurons carry the impulse from the central nervous system to the effector organ for a response. They are also called efferent neurons. On touching a hot object, the impulse travels from the brain or spinal cord to the skeletal muscles, stimulating them to contract and instantly remove the body from the hot thing.
The interneuron or the relay neuron synapses with a motor neuron, which leavesthe spinal cord via the ventral root. The integration center communicates between the central nervous system and the sensory and motor neurons. Most reflexes are controlled by the spinal cord instead of the brain. It is because the path from most body parts to the spinal ...
The muscle or the gland that produces the response is called an effector. The skeletal muscle is one such effector.
Reflex arc - The fixed neural pathway that controls the reflex response. Relay neurone - An intermediate neurone that sits within the central nervous system. Allow pupils to sensibly and kindly trigger a reflex response to allow pupils to realise that the response happens before they know about it.
The nerve pathway followed by a reflex action is called a. reflex arc. For example, a simple reflex arc happens if we accidentally touch something hot. Receptor in the skin detects a stimulus...
The reflex arc. Examples of reflex arcs in humans include responses to pain and blinking. The order of neurons in a reflex arc is: The neurons are separated by narrow gaps called....
A reflex arc is a neural pathway that controls an immediate and involuntary response to a stimulus, bypassing the brain for a faster reaction. It involves sensory neurons that carry signals to the spinal cord, interneurons that process the information, and motor neurons that cause muscles to react.
Apr 29, 2021 · A reflex arc is a pathway along which impulses are transmitted from a receptor to an effector without involving ‘conscious’ regions of the brain. As it does not involve the brain, a reflex response is quicker than any other type of nervous response. Examples of simple reflex actions that are coordinated by these pathways are:
