Answer:
Sympathetic division is responsible for the nervousness, pounding in the chest and the butterfly movement in the stomach while parasympathetic division overest a and digest the nervousness.
Explanation:
The nervousness experienced when someone is about to speak in front of a class is caused by the sympathetic system which have divergent effects as many different effector organs are activated together for that same purpose. I.e More oxygen are inhaled and delivered to skeletal muscle. The respiratory, cardiovascular, and musculoskeletal systems are all activated at the same time causing an unstable reaction to the central nervous system...
On the other hand, the parasymthetic division causes the central nervous system to rest and digest at a very slow rate..
At a point in time the central nervous system triggered an Homeostasis action which posses a balance between the two divisions.I.e symthetic and parasymthetic and then brings about a balance to the body reaction at that same point.
Answer: The correct option is B.
To increase the visual contrast in the specimen
Explanation:
Compound microscope is a microscope that consist of large lenses to enlarge images. Scientist normally stain specimen before they observed it under compound microscope because it will visualise the specimen and make some component of it to be visualise well. Some metabolic processes can also be differentiated and observed well.
animals, plants, insects and bacteria, as well as nonliving components like rocks, soil, water and sunlight.
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