0
because it is the cells
Wiki User
∙ 10y ago
Add your answer:
Earn +20 pts
Nerve fibers send an impulse to the brain when the waves reach the?
Cochlea.
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.
What will happen if the spinal cord is cut or damaged in the neck?
We wont be able to walk properly and as the nerves are joined to the spinal cord the immediate action messages will take time to reach the brain and then there will be a problem in the proper functioning of the reflex action
If A nerve impulse travels through your nervous system at an avg rate of 132 m per s How much time does it take for an impulse a distance of 1.49 m to reach your brain?
11 mS
What is a reflex?
A reflex is a quick involuntary action. There are five steps to a reflex: the stimulus occurs, the sensory neurons sense the stimulus, it sends a message to your spinal cord (it doesn't reach the brain right then), the spinal cord sends a message to your motor neurons, and the reflex occurs. While this is happening, the message goes on to your brain, which is why you feel the pain slightly after you jerk your hand out of the hot tub.A reflex is an involuntary response to a stimuliBlinking, Gagging, and Coughing, are examples of reflexes. In Infants, there are reflexes called Moro, rooting, and sucking.Many of the reflexes of infants are lost as they grow older. For example, sucking from a nipple for food is different than using a straw. Use of the straw is not response to stimulus, and therefore not a reflex.Reflexes follow a Reflex ARC. The Arc is through the spinal cord. While the information gets sent to the brain (you know you touched something hot, or you are choking and coughing), the reflex totally by-passes the brain. A reflex arc starts at the point of stimulation, goes to the spinal cord, and the return arc is the action. It saves time. Reflexes are protective. For instance: Touching a hot stove. You touch it, and the response is an immediate reflex to withdraw. It didn't go to your brain for you to think about. The arc was at the spinal cord for faster response time.
Why is a reflex more rapid than a voluntary movement?
Because the signal for a spinal reflex originates in the dorsal root ganglion and not the brain, thus the time it takes for the signal to reach the target muscles or structures is much shorter.
How does a nerve impulse follow the all or nothing principle?
The action action potential produced needs to reach the threshold for the AP to be propagated. If it doesn't reach the threshold, there is not enough Na+ to stimulate the positive feedback system which allows the action potential to be self-propagated. Instead, K+ channels will be opened, and it will enter repolarisation phase, and the AP wll not be conducted.
How do messages reach the brain and interpreted by the brain?
Messages reach the brain via one of the sensory organ, like nose, eye, ear, tongue or skin. The impulse travel through the most complicated paths to interpret the messages. That should be beyond the capacity of the science to know this, specially in case of human being. You may know the same in case of primates, with the help of some discovery in near or distant future.
What are the limitations of the use of electrical impulse in the body?
it takes time to reach its mechanism.
How long does it take alcohol to reach your brain?
It only takes a few seconds for a chemical to reach the brain once it reaches the lungs but the timing of the effect of the chemical is variable, depending on circulation time, diffusability, concentration, fat solubility, metabolism, mechanism of action, etc.. For all practical purposes, most chemicals reach the brain in adequate amounts within 10 seconds.
How does a message from the brain reach the brain?
by the medulla oblongata
How do pain messages reach the brain?
pain reach our brain by the nerves i think so .
