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What is the name given to reflexes that involve more than 2 neurons?
Wiki User
∙ 12y ago
polysnaptic reflex
Wiki User
∙ 12y ago
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What is a message sent from a sensory neuron to an interneuron and then goes on to the motor neuron?
The message is transferred with an electron signal, pulses (arcing between the two neurons). This is similar to an electrical circuit (in which electrons also flow to different circuit components), or to a fiber optic line (where pulses of light serve as substitutes to the electrons).
The area of message exchange between the neurons begins to operate faster the more a person what a particular activity?
The area of message exchange between the neurons begins to operate faster the more a person what a particular activity?
What functional advantage does a neuron with several dendrites have over a neuron with only one dendrite?
Neurons with one dendrite = only capable of 1 signal. Neurons with more than one dendrite = more signals and more accesible to different parts of the body.
Why is the cerebral cortex convoluted?
The brain is convoluted so that more neurons can live in the cell.
What are the two types of nervous tissue?
neurons (brain cells) & neuroglia (support)---------------------------------------------------Multipolar Neurons (3+ processes) They are the most common neuron type in humans (more than 99% of neurons belong to this class) and the major neuron type in the CNS Bipolar Neurons Bipolar neurons are spindle-shaped, with a dendrite at one end and an axon at the other . An example can be found in the light-sensitive retina of the eye. Unipolar Neurons Sensory neurons have only a single process or fibre which divides close to the cell body into two main branches (axon and dendrite). Because of their structure they are often referred to as unipolar neurons.
Why do more complex reflexs have slower response times?
Reflexes are automatic, involuntary responses or impulses. Most reflexes do not involve the brain, however, more complex reflexes have to involve the brain in order to process the reflexes. An example of this would be blinking the eye. This is a complex reflex and it must involve the brain. Also, you must take in the place the reason why reflexes do not involve the brain: because it could cause serious damage to the body. Complex reflexes will not cause serious damage if it uses to brain to produce the impulse.
Spinal reflexes are produced in what?
Introduction. Spinal cord reflexes are simple behaviors produced by central nervous system (CNS) pathways that lie entirely within the spinal cord. The sensory afferent fibers that evoke these reflexes enter the spinal cord and activate spinal motor neurons directly or through a chain of one or more spinal interneurons
Are reflexes unconditional?
Reflexes can be either unconditional or conditional. Conditional, also referred to as 'Pavlovian', reflexes are those that we can develop. They are weak in humans, but can be observed more readily in other organisms. For more information on these, research Pavlov's dog. Unconditional reflexes are those which are innate - we're born with them. Neurologically speaking these typically do not have any nerves passing through the brain, unlike conditional reflexes in which neurons pass through higher cortical areas of the brain. An example of an unconditional reflex in humans is beginning to salivate when we smell something yummy. This is down to our olfactory tracts, which contain receptors which will stimulate a reflex resulting in secretion from the salivary glands.
How do basic and learned or acquired reflexes differ?
learned or acquired reflex - a reflex which is learned through practice or repetition and may involve both a far more complicated set of triggering stimuli and a far more complicated pattern of motor response, e.g., the reflexive motor actions produced after one has learned to ride a bicycle or drive a car; most such reflexes are somatic because they involve complex response patterns from skeletal muscles. While an unlearned reflex is like breathing
What part of the spinal cord acts as the center for simple reflex activity?
The gray matter is the center for simple reflex activity.Reflexes are rapid, automatic responses to stimuli that "buy time" for the planning and execution of more complex responses that are often consciously directed.The fastest reflexes are somatic motor reflexes that (1) involve myelinated axons, (2) involve only one segment of the spinal cord or one nucleus of the brain, and (3) are monosynaptic.
What is a message sent from a sensory neuron to an interneuron and then goes on to the motor neuron?
The message is transferred with an electron signal, pulses (arcing between the two neurons). This is similar to an electrical circuit (in which electrons also flow to different circuit components), or to a fiber optic line (where pulses of light serve as substitutes to the electrons).
Who has better reflexes boys or girls?
Both genders are born with equal reflexes, but girls who play sports tend to have better reflexes due to the fact that their sports focus less on strength and more on agility.
Do you create more neurons as you get older?
no
Do reflexes happen more quickly or slowly than considered responses?
More quickly
How does the persons age affect his or her reaction time?
Definitely, as our reflexes are at their best when we are in our teens and twenties, though older people can maintain their reflexes more if they stay alert and exercise regularly. Also, reflexes often reflect our adrenaline, and young people are more high strung and adrenaline oriented than the older people.
What specific effects oes cafffine have on neurons?
The effect that caffeine has on neurons is to make them more sensitive to the effects of neurotransmitters. Caffeine lowers the threshold and makes the neurons more sensitive. This means it takes less of the neurotransmitter to affect another neuron.
What effect does the leaking of potassium across the membrane have on the membrane potential of Kevin's neurons?
It makes the inside of the neurons more negative.
