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How are somatic and autonomic reflexes similar and how are they different?
An autonomic reflex is one that involves the response of an organ, such as the peristaltic contraction of the smooth muscle of the intestines, that is not controlled consciously. Somatic reflexes involve a response that involves a skeletal muscle contraction in response to a stimuli. Sensory nerves send signals through an afferent pathway to the central nervous system for processing. If a quick response is needed, the spinal cord will send out a signal back out the efferent pathway to the appropriate skeletal muscle. The signal is also sent up the spinal cord to the brain for further processing. This 'splitting' of the signal allows the reflex to happen quicker than if the signal were sent only to the brain for processing before a response could be initiated. The autonomic reflex is associated with one branch of the peripheral nervous system that regulates the sympathetic and parasympathetic divisions; these include internal organs and glands. A somatic reflex is part of the other branch of the peripheral nervous system that controls skeletal muscle movements, including the reflexes, like the knee jerk test that a doctor would give you.
Which animals respond to stimuli?
A reflex is an automatic response to a stimulus. Humans use reflex actions in only some of their behaviour, for example controlling the eye's pupil size. Simple reflexes. Simple reflexes produce rapid involuntary responses to a stimulus.
What is the difference between cerebral reflex and a spinal reflex?
There are two major differences between the dura of the brain and the dura of the cord. The dura of the brain consists of two layers; the periosteal layer is attached directly to the inner surface of the skull and the meningeal layer is deep to the periosteal layer. In places, the two layers are fused together; in other places, dural sinuses lie between the two layers. There is no epidural space associated with the brain
Which component of a reflex arc is located entirely within the central nervous system?
Many authors refer to the CNS portion of the reflex arc as the integration center.In regards to a monosynaptic reflex arc, the synapse is the only portion of the integration center.Polysynaptic reflex arcs, have multiple synapses and interneuron(s).
What are reflex arcs and reflex actions?
The reflex arc is the nerve pathway that the signal follows. For example, the knee jerk reflex arc has a stimulus going to an interneuron in the spine and a motor neuron completes the arc by causing the knee to jerk. A reflex is just the action itself.
A reflex pathway having only one synapse in the CNS?
Reflexes are rapid involuntary responses to a given stimuli. The reflex pathway that only has one synapse in the CNS is called the monosynaptic reflex arc.
Why don't we have to think before a reflex?
Because reflexes only occur at the level of the spinal cord, not the brain.
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.
What are some of the uses for reflex hammers?
Reflex hamers are medical instrumets and are only used for medical applications. The makker is mot commonly used to test deep tendon reflexes.
Are Biceps voluntary?
biceps is voluntary because it only cotracts when it receive signal from the brain. Otherwise it can act reflex when some events stimulate it
What kind of digestive tract neural reflex involves only the nerve plexuses that lie in the walls of the digestive tract itself?
short reflexes
What is a reflex why is it important?
An involuntary action that is performed by our body in response to something is known as reflex action. It is important for our immediate survival or you can say helps us to respond quickly to anything that can harm us.
The knee jerk reflex is an example of a?
A reflex is a rapid, involuntary response to a stimulus. A reflex arc is the pathway traveled by the nerve impulses during a reflex.Most reflexes are spinal reflexes with pathways that traverse only the spinal cord. During a spinal reflex, information may be transmitted to the brain, but it is the spinal cord, and not the brain, that is responsible for the integration of sensory information and a response transmitted to motor neurons.Information is sent to the brain but that takes awhile longer. It is best if you remove your hand from the fire as fast as possible and not wait until the brain yells "hot, hot!".
How is a reflex different from a voluntary movement?
A voluntary action is when someone decides to do something eg. flinches when someone goes to hit them. A reflex is something that your body does natural eg. heartbeat, sweat, repair etc. Trust me we are doing this in class sooooooooo boring!
What is the difference between a spinal reflex and a cranial reflex?
A cranial reflex is one that is controlled by one of the cranial nerves and tend to take place in the facial or head area. These can include reflexes like the constriction of the pupils in response to light, etc. A spinal reflex, on the other hand, is a reflex that involves only the spinal nerves and is not processed by the brain. An example is the patellar reflex, like when the doctor hits your knee and it reflexively moves. Hope this helps! :)
Why is a spinal reflex more rapid than a voluntary movement?
AnswerBecause a reflex action is automatic and does not involve a thought process.Edit: A reflex action only has to go to the spinal cord and then back to the limb, whereas a voluntary reaction has to go to the brain to be processed and therefore takes longer.
Do reflexes always involve the spinal cord?
Yes, the spinal cord controls ALL of your reflexes!
