Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Cardiac Output - Circulation
The cardiac output can be determined in a number of ways. The most common method is the Fick's principle. A. Fick a German physiologist in 1870 described a simple method of calculating cardiac output from measurement of oxygen consumption (or carbon dioxide production) and the difference between oxygen (or carbon dioxide) contents of blood entering and leaving the heart.
The volume of blood ejected by each beat of the heart is the stroke volume. The mean stroke volume is determined by dividing cardiac output by heart rate. In other words, cardiac output can be calculated if we know the values of heart rate and stroke volume. Therefore, cardiac output can be increased by increasing either the heart frequency or the stroke volume or both. However, in mammals there may be little change in stroke volume if cardiac output is to be altered, major adjustments are made in the heart rate. The distribution of blood to the various organs of the human body is given in Table You can see from the Table that kidneys, liver, heart and brain make up only 5% of the total body weight but receive more than half of the total cardiac output. Stroke volume can also be defined as the difference in volume of blood before and after contraction. Two factors influence stroke volume, one is the hormone adrenaline (epinephrine) which increases contractions thus forcing a larger volume of - blood out of the ventricles in a single stroke. The other is the amount of blood present in the ventricles before contraction.
If the returning venous blood to the heart is increased, then ventricles will be filled with more blood and following contraction more blood will be ejected out. This relationship between cardiac output and increased venous volume was discovered by the English physiologist Ernest H. Starling. This relationship will be further discussed when we talk of blood flow during exercise.
Q. Which type of virus is the HIV? What is the enzyme reverse transcriptase present in HIV? HIV is a retrovirus that is RNA viral (its genetic material is RNA and not DNA).
Define nutritional needs During Recovery? Here, let us discuss what should be the nutritional goals based on the physiological aspects involved. Goals: The main emphasis mus
Define regulation of L-PK enzymes by starvation & refeeding? L-PK catalyzes the conversion of phosphoenolpyruvate to pyruvate and plays an important role in directing pyruvate
how biochemical evidence proof DNA as a genetic material?
Question 1 Identify the specimen, class to which it belongs and write the salient features of that class. Question 2 Write
Explain Generation of sound in MVP? Generation of sound in MVP: These are generated due to sudden tensing of redundant leaflets and elongated of chordae tendinae. Interventions
The article entitled "Life on Earth" is trying to make the point that RNA likely included before DNA. Forthis article which of the following is false? A. Chains of RNA nucleoti
Question 1: Describe the process of hearing. The ear consists of three basic parts - the outer ear, the middle ear, and the inner ear. Discuss the process of hearing
Explain about the water-soluble vitamin - Riboflavin? Riboflavin (vitamin B 2 ), a water-soluble vitamin, was discovered in milk as a pigment possessing a yellow green fluore
what is the arrangement of microtubules in the sperm
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd