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Nerves
Nerves are thread-like structures that form a network of pathways that transmit information from the brain to the body and the body to the brain, in the form of electrical impulses.
1,605 Questions
What is responsible for degrading acetylcholine so that it does not remain in the synapse?
acetylcholinesterase
How does a message. travel across the gap. at a synapse?
it is sent through the neurotransmitters
At the synaptic terminal an electrical impulse will trigger the migration of vesicles containing neurotransmitters toward the presynaptic membrane.
Leaves the presynaptic neuron, activates ion channel
The nerves are all over your body, and look similar to veins on a diagram of an animal, the nerves go close to the surface of your skin, when you touch something, the nerves let you know by sending information to your brain, and when you get used to the temperature of the water, it's just that the nerves stop telling you it's hot/cold.
Skidget
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.
Which cranial nerve lies medial to the vagus nerve?
That would be the hypoglossal nerve, which lies medial from the vagus, accessory, glossopharyngeal nerves.
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.
How many neurons are in a dog's brain?
160 million. And even though a dog's brain is usually larger than a cat's brain, cats have almost twice as many neurons as dogs with 300 million of them.
What are bundles of neurofilaments important in maintaining the shape and integrity of neurons?
Nuerofibrils
Why is an efferent neuron multipolar?
Efferent neuron is a neuron that regulate the action of a muscle, gland, or other effector tissue. It is a neuron which produces impulses outward from the brain or spinal cord, so its consider a multi-polar neuron.
Is a flow chart appropriate to illustrate the process of synaptic transmission?
no, because a diagram should be used to represent the process
Flow chart to illustrate the events occurrung in an axon of a neuron with the arrival of a nerve impulse
What stimulates the release of neurotransmitters allowing neurons to communicate with each other?
Once action Potential reaches Dendrides of the Neuron, the cell is Depolarized, causing the cell (neuron) to release a chemical signal, known as a nuerotransmitter, from the Pre-synsaptic cleft, where it will bind to recepters on the Post-synaptic cleft.
No grip and pins and needles in hand?
i have nogrip in both hands and pins a niddles in thumb and first 3 fingers
What does novocain do to neurons and their transmission of impulses?
i have no idea but based of other thing and my expirence
nova blocks the pulse tranmistion causing numbness to the sencitivity of the nerves also the needle use to enject it is very long and pain full
[btw im 13] but i know alot
When is an impulse an electrical signal?
When a stimulus causes positively charged ions to diffuse into the neuron.
Where is pain felt when a L5 nerve is pinched?
Pinching of the L5 nerve causes weakness in the big toe and ankle and pain on the top of the foot that may extend up to the buttocks.
Can you aspirate during an egd?
I have had one before and that is why you don't eat or dring anything after midnight and that way your stomach is empty.
Also if you have any acid problems or an upset stomach, medicines can be given to you before your EGD.
Why superficial reflexes are lost in upper motor neuron lesion?
because the superficial reflex fibres also come through the umn fibres along with it
