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What structure detects the stimulus in the reflex action?
The stimulus is detected by temperature or pain receptors in the skin. These generate impulses in sensory neurons. The impulses enter the CNS ( Central nervous system ) through a part of the spinal nerve called the Dorsal root.
Why are reflex actions very fast?
The impulse in a reflex action goes directly from the sensory neuron to the inter neuron to the spinal cord, which allows for faster actions.
In humans one function of an interneuron is to relay impulses directly from?
In humans, one function of an interneuron is to relay impulses directly from sensory neurons to motor neurons. This allows for a quick response without involving the brain in every reflex action.
What is the receptor of a reflex arc?
Sensory receptor located at the distal end of a neuron or an associated sensory structure. When stimulated it creates a receptor potential, when that reaches its threshold, it will trigger 1 or more nerve impulses in the sensory neuron.
What does the reflex action involve?
Protection(?)
The sensory receptor sensory neuron motor neuron and effector involved in a reflex form a?
The sensory receptor, sensory neuron, motor neuron, and effector involved in a reflex form a reflex arc. This is a neural pathway that controls a reflex action in response to a stimulus without conscious thought.
The conductor of nerve impulses that initiates reflex reaction to sensory information without input from the brain is the what?
The conductor of nerve impulses that initiates reflex reactions to sensory information without input from the brain is the spinal cord. It acts as a relay system, allowing sensory information to be processed and responded to quickly to protect the body from potential harm.
What are three different types of nerves?
In a typical reflex arc, the 3 kinds are: # sensory # interneuron # and motor.
What does the face get red when one is angry?
Because its a reflex action. nerve impulses are sent.
Is a reflex is a voluntary action?
No, it is by definition involuntary. The neural impulses which cause the action do not go through the brain at all.
What nerve is carrying the afferent and efferent impulses during the patellar reflex?
The nerves innervate the quadriceps. The afferent nerves are the muscle spindles and the efferent are the motor neurons.
How does the four major elements of a simple nervous pathway function during pain withdrawal reflex?
During a pain withdrawal reflex impulses are sent through different nerves and to the spinal cord. This reflex does not make it to the brain but only to the spinal cord. We call this involuntary action because we dont control reflexes. The sensory neurons are the first to recieve the impulse, then they travel to the interneurons, or associative neurons, and then they go to the motor neurons which carries the impulse to the central nervous system. Then the effector is the response, so in this case your musscle will contract.
