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Which neuron has its cell body inside the spinal cord?
cell body
Which part of a reflex arc would have a cell body in the posterior root ganglion?
The sensory (afferent) neuron has a cell body located in the posterior root ganglion of the spinal nerve. This neuron carries sensory information from the peripheral receptors to the central nervous system.
How does effector relate to reflex arc?
An effector is a part of the body (such as a muscle or gland) that carries out the response in a reflex arc. In a reflex arc, when a stimulus is detected by a sensory receptor, a message is sent via a sensory neuron to the spinal cord, where it is processed, and then a message is sent via a motor neuron to the effector causing a response.
What is the withdraw reflex?
a spinal reflex intended to protect the body from damaging stimuli.
What Acts as a reflex center of the body?
the spinal cord
What happens in the path of a reflex action?
In a reflex action, a sensory neuron detects a stimulus and sends an impulse to the spinal cord. The signal is then processed by interneurons, which relay the impulse to a motor neuron. This motor neuron transmits the signal to the appropriate muscle, causing it to contract and respond quickly, often before the brain is aware of the stimulus. This rapid response helps protect the body from harm.
What are the structures and functions of a reflex arc?
A reflex is a rapid, involuntary response to a stimulus such as a hot stove.The reflex arc is the pathway traveled by the nerve impulses during a reflex. Most reflexes are pathways that traverse only the spinal cord.During a spinal reflex, information may be transmitted to the brain, but it is the spinal cord that is responsible. They can happen faster than you can think about it.A reflex arc involves the following components:The receptor is the part of the neuron (usually a dendrite) that detects a stimulus (burn).The sensory neuron transmits the impulse to the spinal cord.The integration center involves one, two or more synapses in the gray matter of the spinal cord.A motor neuron transmits a nerve impulse from the spinal cord to a peripheral region.An effector is a muscle or gland that receives the impulse form the motor neuron (remove the hand). In somatic reflexes, the effector is skeletal muscle. In autonomic reflexes, the effector is smooth or cardiac muscle, or a gland.
What are nerve pathways that produce responses without involving the brain?
Reflex arcs are nerve pathways that produce responses without involving the brain. These reflex actions are quickly generated in response to a stimulus and help protect the body from harm or injury. The signal travels from the sensory neuron to the spinal cord and back out through the motor neuron to produce a rapid response.
What is the basis for the functional classification of neurons?
Functionally, neurons or nerve cells are classified into three types,1. Sensory or afferent neuron- a neuron that carries signals towards brain.2. Motor or efferent neuron- a neuron that carries signals away from brain.3. Inter-neuron which is present in gray matter of spinal cord and convert sensory signals into appropriate motor signals during spinal reflex.
Where does synapses occur in the spinal cord?
Cell body of sensory neuron - in dorsal root ganglion. Cell body of motor neuron - in anterior gray horn.
What is the path that nervous impulse takes through the nervous system?
A nervous impulse begins in the dendrites of a neuron, travels through the cell body and axon, and then is passed on to the next neuron via a synapse. This sequence repeats until the impulse reaches its destination, such as a muscle or gland, where it triggers a response.
Why is a spinal reflex important?
A spinal reflex is crucial because it allows for rapid, involuntary responses to stimuli, helping protect the body from harm. For example, the knee-jerk reflex enables quick reactions to potential threats, such as withdrawing a foot from a sharp object. This reflex action occurs without the need for conscious thought, allowing the body to respond swiftly to danger. Additionally, spinal reflexes play a role in maintaining posture and balance.
