Describe the role of arteries as pressure reservoir and arterial pressure.
Answers
Seeds develop and mature within the fruits. Once the fruit attains maturity and ripens it is shed and the seeds inside it undergo period of dormancy. In some of the succulent fruits even though the seeds are provided with moisture they do not germinate. This is because of lack of other germination factors.
Dormancy is imposed by several inhibitors present in the seed coat or the seed itself. Sometimes seed coat is thick and highly impervious to water and oxygen. In the latter part of our discussion we shall discuss some of the factors which cause seed dormancy and also how this dormancy is overcome.
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Arteries are low resistance vessels that serve as pressure reservoirs to maintain blood flow during diastole. All arteries have muscular walls. In response to pressure, to paracrines, and to nervous activity, the smooth muscle of the artery can either constrict or relax and thereby change the diameter of the vessel.
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