Explain change of posture - decreased cardiac output, Science

Assignment Help:

Explain Change of posture - Decreased Cardiac Output

When a person stands up from lying down posture, there is an immediate but transient fall in systolic blood pressure. This is because, upon standing, there is a pooling of venous blood in the lower limbs due to gravity. This leads to a decreased venous return, which in turn decreases the stroke volume and cardiac output causing a fall in the systolic pressure.

However, within fifteen seconds, the baroreceptor reflexes bring about a cardio acceleration and vasoconstriction. As a result, the blood pressure soon returns to normal or may rise above value due to overcompensation. You may work out the changes on standing.


Related Discussions:- Explain change of posture - decreased cardiac output

Life in the oceans, Life in the Oceans: Oceans are known as the largest...

Life in the Oceans: Oceans are known as the largest and the thickest ecosystem. Tiny plants and animals exist in it, in  immense numbers. A cubic meter of sea water may contain

What are the factors affecting soil formation, What are the Factors Affecti...

What are the Factors Affecting Soil Formation  Parent materials formed due to weathering of rocks are transported from the place of their origin and re-deposited before they ar

Chain reaction, Chain Reaction: When the atomic nucleus splits, it not ...

Chain Reaction: When the atomic nucleus splits, it not only gives off energy, but also throws out two or three more  neutrons.  'These new neutrons can,  in turn,  split two or

Earth''s surface is most direct at which latitude, The angle of insolation ...

The angle of insolation on the Earth's surface is most direct at which latitude: At  0 o latitude

Heat loss in cylinderical pipe, Ask quesExplain that your intention is to i...

Ask quesExplain that your intention is to investigate a variety of combinations of pipe material, insulation material and size which you could potentially consider when deciding on

Protozoans, Special/Unique organelles and how they assist sarcodine

Special/Unique organelles and how they assist sarcodine

Balloon experiment, Another balloon experiment Stretch a rubber balloon...

Another balloon experiment Stretch a rubber balloon over the neck of a little bottle. Place it in the receiver jar and delete some of the air with the pump. What happens? How d

Fire blankets-water extinguishers, Fire Blankets :  We have already discus...

Fire Blankets :  We have already discussed the use of fire blankets, but it is worth noting that fire blankets are now made of glass fibre instead of asbestos, and that they are u

Social and economic impact of modern communication, Social and economic imp...

Social and economic impact of modern communication technology: Quite obviously a society which will utilise advanced communication technology in  the ways mentioned above, woul

#titlecell, which is longset cell in human body

which is longset cell in human body

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