0
Nervous System
This category is for questions about the mechanical and chemical process of reactions to internal and external stimuli, ranging from the brain down to the spinal cord, and all nerves, cells and tissues in between.
3,047 Questions
What part of the nervous system does the establishment and expression of emotions involve?
(i learned this while i was watching the water boy with Adam sandler in it.) it actually comes from the abdula umblingada. (im 11 i don't know how to spell it. i just know what it is.)
What is the divergent circuit inthe nervous system?
There are three types of circuits which brain researchers have identified. They are divergent, convergent, or reverberating:
* Convergent circuit - Signals from many neurons are sent on to just a few.
* Divergent circuit - Signals from one neuron are sent out to many others.
* Reverberating circuit - A circular circuit that returns a signal to its source.
What part of our body does not feel when touched?
Hair, finger and toe nails
if someone is not paying attetion to you, and you touch their elbow you cant feel it
What nervous system transmits information to voluntary muscles while the?
It is the somatic nervous system that transmits information to voluntary muscles. The autonomic nervous system transmits information to involuntary muscles.
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.
Do myelinated nerve fibers conduct signals faster than unmyelinated fibers?
Yes, unmyelinated axons, action potentials are generated at sites immediately adjacent to each other and conduction is relatively slow. Degree of myelination speeds up transmission.
Phrenic nerve What are the Symptoms of nerve root irritation c4 right?
Typically, symptoms of nerve root irritation from C4 manifest themselves as shoulder pain. C4 refers to the 4th vertebra in the cervical region, where part of the phrenic nerve originates.
What are characteristics of neurotransmitters?
Neurotransmitters are released in response to stimulation. They alter the physiology of the postsynaptic cell. They are synthesized by a presynaptic neuron. They bind to specific receptors on the postsynaptic cell.
What does the sympathetic division of the automomic nervous system do?
The sympathetic nervous system is the part of the autonomic nervous system which prepares the body for fight-or-flight actions.
In this regard, it causes a release of the hormone adrenaline (epinephrine), increases heart-rate and the force of contraction of the heart (which sends more oxygen to the muscles of the body, for running or fighting), widens bronchial passages (so more oxygen can be inhaled quickly), increases blood pressure, releases glucose from the liver (fuel for running or fighting), decreases blood flow to the intestines (so more blood goes to the muscles), speeds up blood clotting function (damage control), increases perspiration (to help cool the body during exertion), and dilates the pupils of the eyes (to better focus on danger).
Does a synapse separates the axion end of one neuron to the dendrite end?
Yes, a synapse is the space (a VERY SMALL one!) between the axon of one neuron and the dendrites of the next neuron.
Which cranial nerve lies medial to the vagus nerve?
That would be the hypoglossal nerve, which lies medial from the vagus, accessory, glossopharyngeal nerves.
What happens to tour nervous system when you catch a ball?
When you catch a ball, your nervous system processes visual information to track the ball's trajectory, activating the visual cortex. This information is relayed to the motor cortex, which coordinates the necessary muscle movements to position your hands for the catch. Sensory feedback from your hands and arms helps refine your grip and adjust your movements in real-time. Overall, this complex interaction allows for quick and precise actions in response to external stimuli.
After several months of ALD what does Lorenzo's neuron look like?
It has lost its myelin sheath (clothes) so it can no longer be used to send messages from the brain to other parts of the body.
What is meant in layman's term the nervous system growth process of synaptogenis, myelination, and pruning and how it relates to healthy human development.
I am trying to explain this process to middle school kids.
Is the brain an effector in the autonomic nervous system?
The brain is not an effector. An effector refers to the glands and muscles doing activity.
The cellular unit of the nervous system is the neuron What is the major function of this cell type?
Transmit messages (nerve impulses) from one part of the body to another
Who suffers from essential tremor?
Essential tremor affects men and women equally. The shaking often appears at about age 45, although the disorder may actually begin in adolescence or early adulthood.
