Why Is a Cardiopulmonary Bypass Machine Necessary During Heart Surgery

question 22

Multiple Choice

Why is a cardiopulmonary bypass machine necessary during heart surgery?

• A) It's impossible to operate on a beating heart, so the machine has to take over the function of the heart.
• B) Otherwise, the heart will stop beating.
• C) There will not be enough oxygen getting into the lungs.
• D) It isn't always, but it's used to minimize risk.
• E) It's not necessary for heart surgery, but it is necessary for surgery involving the lungs.

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Definitions:

Engel Curve

An Engel curve depicts the relationship between an individual's income and the quantity of a good purchased, illustrating how spending on the good varies with changes in income.

Demand Curve

graphically represents the relationship between the price of a good and the quantity of that good that buyers are willing to purchase at various prices.

Price Elasticity

A measure of how much the quantity demanded of a good responds to a change in the price of that good, defined as the percentage change in quantity demanded divided by the percentage change in price.

Total Expenditures

The sum total of all spending, often referenced in the context of consumer, government, or business expenditures.