All of the Following Are Adaptations That Allow the Heart

question 60

Multiple Choice

All of the following are adaptations that allow the heart to use aerobic respiration for energy except which one?

• A) Cardiac cells have fewer mitochondria.
• B) Cardiac cells are rich in myoglobin.
• C) Cardiac cells are rich in glycogen.
• D) Cardiac cells use a variety of fuels as energy sources.

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Definitions:

GTP

Guanosine triphosphate, a nucleotide important for energy transfer within cells and a substrate for protein synthesis.

GDP

Gross Domestic Product, a measure of the economic performance of a country, calculated by adding the total value of all goods and services produced within the country.

G Protein

Guanine nucleotide-binding proteins that act as molecular switches inside cells, involved in transmitting signals from a variety of stimuli outside a cell to its interior.

Adenylyl Cyclase

An enzyme that converts ATP into cyclic AMP (cAMP), playing a key role in cell signaling pathways.