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What is affector neurons?
these have one or more receptors that detect change in either the external or internal environment, information that is detected is transmitted as an electrical impulse to the CNS by the affector neuron.
What is the part of nerve cell transmit messagefrom the brain to the different part of the body?
Motor neurone send message from the brain to the affector
What is the system's reaction to the stimulus?
The system responds to stimuli by processing the information received and generating an appropriate output or response. This response is determined by the system's programmed rules or algorithms, which dictate how it should react to specific stimuli.
Why is a robot wrist more flexible than a robot elbow?
Usually, because they are built to act and control like a human wrist and elbow. Our wrist has more degrees of freedom than our elbow, so that was how many of the first designers made the robots: it is usually easier to copy something that we are already familiar with and we know works than to have to come up with an entirely new design and work the bugs out. Other reasons have to do with stability (the elbow that only moves up and down can be built to flex less sideways when a load is put on the gripper or other end affector), ease of programming (fewer degrees of freedom per joint translates to fewer possibilities of positioning and fewer lines of code) and predictability of movement.
Where are cell bodies of the somatic motor neurons of the spinal nerves located?
It depends on whether it is afferent or efferent. The afferent neurons have their soma, or cell body, near the sensory receptor sites in the body tissues. The efferent spinal nerve cells have their soma near the spinal cord cord in a ganglion. The gray matter in the spinal chord is mostly made up of the cell bodies of one of the three types of neurons, afferent, or sensory neurons, interneurons, which are also called association neurons, and efferent, or motor, neurons. The interneurons have their cell bodies roughly in the middle, with the dendrites projecting out to one side (usually heavily branched) and the axon projecting out to the other but each only a short distance. In motor neurones (efferent neurone) the cell body is very much at one end, with the dendrites branched directly from and the axon projecting a long way to reach the target. These neurons also have their cell bodies in the spinal column (usually) but there just are not as many of these as there are interneurons. The sensory neurones (afferent neurones) are quite like the interneurons in structure as they have their cell bodies in the middle but the distance the dendrites and the axons projects are much greater. The allows the cell bodies from many sensory neurons to be grouped together, a fair distance from the sensing tissue, what is also referred to as as affector organ, in a structure called a ganglia (the name for a collection of cell bodies in the periphery).
