Susan Suffered from a Heart Attack

question 9

Multiple Choice

Susan suffered from a heart attack. When the doctors tested the heart muscle, they found that she had an increased ratio of lactic acid to pyruvic acid in her heart. What does this say about the availability of oxygen in her heart muscle cells?

• A) The heart cells must have received too much oxygen.
• B) The heart cells had not received adequate oxygen supply.
• C) The heart cells had a buildup of carbon dioxide, poisoning her cells.
• D) The lactic acid built up as a result of cellular respiration occurring at too fast of a rate.
• E) The heart cells had too much carbon dioxide accumulate.

Identify factors that cause shifts in demand curves.

Analyze the effect of price changes on the demand for goods and services.

Understand the concept of substitutes and complements in affecting demand.

Recognize the impact of income changes on the demand for normal and inferior goods.

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Definitions:

Skeleton

The internal framework of bones and cartilage in vertebrates that provides support, protection, and shape to the body.

Vernix

Vernix, or vernix caseosa, is a waxy or cheese-like white substance found coating the skin of newborn babies, providing protection in the womb.

Teratogens

Agents, such as chemicals or viruses, that can cause developmental malformations or defects in an embryo or fetus.

Sensitive Periods

Specific times during early development when the brain is particularly receptive to learning certain skills or knowledge.