Blood pressure, Biology

Assignment Help:

An adequate level of pressure is needed in the arteries to keep the blood flowing through the cardiovascular system. The chief determinant of arterial pressure is the volume of blood in the arteries and the important determinants of this are the cardiac output and the peripheral vascular resistance. The resistance offered by the arterioles accounts for almost half the total resistance in the systemic circulation. The muscle in the arterial wall allows them to constrict or dilate. When they constrict, the resistance increases and the blood pressure increases. The vasomotor centre in the medulla when stimulated sends impulses via  the sympathetic to the smooth muscle in the arteries, arterioles and veins which results in their constriction.


Related Discussions:- Blood pressure

Extractive use of biodiversity, Q. Extractive use of biodiversity? This...

Q. Extractive use of biodiversity? This includes direct use such as harvesting of wild plant species for use as food, fuel, fodder, fibre, shelter or medicine and hunting anima

Explain about the alitame - artificial sweeteners, Explain about the Alitam...

Explain about the Alitame - artificial sweeteners? Alitame (L-α-aspartyl-N-(2, 2, 4, 4-tetramethyl-3-thietanyl)-D-alaninamide), as illustrated in figure, is a sweetener based o

Middle piece - structure of the sperm, Middle piece - Structure of the Sper...

Middle piece - Structure of the Sperm Just behind the head, the small constriction (neck) carries a distal and a proximal centriole. The two lie at right angle to each other.

Disorders of gonads, DISORDER S OF THE GONADS Hypogonadism. Inadequa...

DISORDER S OF THE GONADS Hypogonadism. Inadequate gonadal function is called hypogonadism. It is due to defects in, or injury to the hypothalamus, the pituitary gland, of th

Describe about pulmonary respiration, Q. Besides vertebrates two invertebra...

Q. Besides vertebrates two invertebrate phyla contain species that make pulmonary respiration. Which are these phyla? Terrestrial molluscs and the arachnid arthropods are the i

Explain ground system, G round system:  Plant tissue system, composed com...

G round system:  Plant tissue system, composed commonly of parenchyma cells with some collenchyma and sclerenchyma cells, that occupies the space between the epidermis and the va

What is demography, What is demography? The scientific study of human p...

What is demography? The scientific study of human population is termed as 'Demography'. It focuses attention on three readily observable human phenomena: a) Changes in popul

Describe respiratory system , Describe Respiratory System? The respirat...

Describe Respiratory System? The respiratory system is responsible for the transport of oxygen and carbon dioxide from outside the body to and from the blood. This process is c

Define both drosophila and bacteriophage, Alfred Sturtevant and Seymour Ben...

Alfred Sturtevant and Seymour Benzer's studies of recombination in both Drosophila and bacteriophage demonstrated which of the following? A. The gene is an indivisible unit and

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd