The nervous system is comprised of two main systems, which are the Central nervous system,CNS(Brain and spinal cord) and the peripheral nervous system,(PNS).
<u>Basic Unit:</u>
The basic structural and functional unit of the nervous system is the neuron.
Explanation:
<u>Frequency of the stimulus and number of receptors in the area:</u>
As the reaction shown by the nervous system towards the change will be all based upon the number of receptors which receives the stimulus and also depends upon the frequency of the change occurred.
<u>Cutaneous receptors:</u>
Inside the human body there are number of pain receptors, along with which a limited number of neurons are there to receive the stimulus relating pressure,cold and warmth. As there are sensory neurons found inside the epidermis layer of the skin which are refereed to as the cutaneous receptors. They receive different stimuli, which are basically the change occurred inside or outside the organisms body.
<em>Now, these receptors will detect any change and will direct the muscle spindle fiber either to contract or relax according to the frequency of the stimulus.</em>
A new species being introduced in the environment, the species being forced to move and to adapt to new environments, a mutated individual reproduces with non-mutated individuals.
Explanation:
There are many different explanations for this question.
A lysosome is a membrane-bound cell organelle that contains digestive enzymes. Lysosomes are involved with various cell processes. They break down excess or worn-out cell parts. They may be used to destroy invading viruses and bacteria.
It can be found in Mid-Altantic Ridge. The alternating magnetic stripes in the basaltic bedrock is an evidence of sea floor spreading. The lines in the basaltic rocks, follow whichever is the magnetic field on Earth during the time of eruption.
The carbon cycle is nature's way of reusing carbon atoms, which travel from the atmosphere into organisms in the Earth and then back into the atmosphere over and over again. Most carbon is stored in rocks and sediments, while the rest is stored in the ocean, atmosphere, and living organisms.
