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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
How are cephalopod nervous systems unique among mollusks?
Well what I know about this question is that..............
Cephalopods nervous system is like this all echinoderms have a simple nervous system similar to that of a jellyfish. Around the mouth is a circle of nerve fibers called the nerve ring. In sea stars, a radial nerveruns from the nerve ring to the tip of each arm.The radial nerves control the movements of the sea star's arms.
One characteristic that is unique to echinoderms is the water vascular system. The water vascular system is a system of canals filled with fluid. It uses water pumps to help the animal move, eat, breathe, and sense its environment.The water vascular system of a sea star. Notice how water pressure from the system is used for many functions.
As a general rule communication within a neuron progresses from?
the dendrites to the axon to the axon terminals and then to the cell body.
What is the most highly developed human sense and what is the least developed human sense?
The most highly developed human sense is vision.
What substance is responsible for the white appearance of white matter?
The Myelin Sheath around the axon
You need to be more specific -- which farm animals are you referring to? Cows, pigs, chickens, geese, horses, goats??
It doesn't feel anything. If you touch Magma your body part, including your nerve ends on that part, will evaporate, so you won't feel a thing on that particular place. The places near it will hurt as hell however.
Sympathetic division or fight-or-flight system
Other than sweating are there other sympathetic cholinergic neuron functions?
None of all discovered to date
The neurons that would pick up sound first before it is even relayed to the brain are called?
connecting neurons
The autonomic nervous system is part of the motor division of the peripheral nervous system?
It is True
The interaction of excitatory and inhibitory neurotransmitters are important. There are many different neurotransmitters that are identified within the nervous system and if an individual takes drugs that interfere with the neurotransmitter chemicals, then that could lead to a variety of problems and complications depending what neurotransmitter the drug has affected. For example, Parkinson's disease, characterized by involuntary muscle contractions and tremors is caused by inadequate production of dopamine; Alzheimer's disease, associated with the deterioration of memory and mental capacity, has been related to decreased production of acetylcholine.
The medical phrase is "myoclonic tremor". It is caused by either an injury or condition that affects the nervous system, literally the nerves. Myoclonic tremor is often from a spinal injury. Myoclonic refers to the frequency and quality of the tremor, e.g. fast, slow, rhythmic, etc. Myoclonic can be further distinguished as tonic or clonic, which refers to the degree of musle rigidity that occurs during the myoclonic tremor. Note that the words jerk, jerks, or jerking are offensive to a person who has tremors.
What messages from nerve cells to your brain?
The nerves are part of the Nervous System. The nerves will transmit the information that they get to the brain. Your brain will then send signals back to those nerve cells and tell them whether they should respond to the stimulus or whether they should just ignore.
Constant level of nervous stimulation to the muscles in the blood vessel walls. This gives the muscles a resting level of contraction.
What does the fifth cranial nerve do?
Cranial nerve V. is the trigeminal nerve. It got its name after its three branches. Two of the branches are pure sensory, the third is mixed motor and sensory.
In short, it gathers sensory information from the scalp, eyelids, eyes (from the cornea and conjuntiva, NOT visual information), nose, cheeks, lips, teeth, gums, oral cavity and jaw. The motor fibers innervate muscles involved in chewing and swallowing.
