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

Matter and Energy, Using what you know about the energy—matter relationship...

Using what you know about the energy—matter relationship, explain why the ecosystems with the greater amount of overall energy tend to have a greater number of organisms.

Write a brief note on nccam with its purpose, Question 1 Enlist the seven ...

Question 1 Enlist the seven natural principles of the body according to Unani system Question 2 List and explain the types of treatments (chikitsas) of Ayurveda. Classify the

Science, In the following table state how gymnosperms are adapted for livin...

In the following table state how gymnosperms are adapted for living on land with respects to each of the following aspects Aspect Adaptation for living on land Alternation of Gener

Diabetes mellitus, life style modification in management of diabetes?

life style modification in management of diabetes?

Treatment and disposal scope of first aid, Treatment: First aid treatment ...

Treatment: First aid treatment is a set of actions taken to preserve life of the casualty, prevent the conditions from becoming worse and promote his/her recovery. Disposal:

State about the ratio of rainfall and evaporation, State the ratio of rainf...

State the ratio of rainfall and evaporation The ratio of rainfall and evaporation is called as P/E ratio, where P stands for precipitation and E for evaporation. If P/E ratio

Explain about the alluvial soils, Explain about the Alluvial soils All...

Explain about the Alluvial soils Alluvial soils are characterised by their extreme depth, often several hundred feet, and a grey or greyish brown colour. Their texture varies

Procedure of a carbon dioxide fire extinguisher, Procedure : A mock fire m...

Procedure : A mock fire may be created by spilling a flammable liquid like alcohol, petrol etc. and lighting it at a safe place away from the equipments and working benches. Th

Determine the structural units of silicate clays, Determine the structural ...

Determine the structural units of silicate clays The tetrahedral and octahedral sheets are the fundamental structural units of silicate clays. They bound together within the cr

Explain fate of the neurotransmitter, Explain Fate of the Neurotransmitter ...

Explain Fate of the Neurotransmitter Postsynaptic membranes bind the neurotransmitters by an active process. The chemicals keep moving in and out of the membrane. The synapse t

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