All Cells in a Complicated Multicellular Organism

question 156

Multiple Choice

All cells in a complicated multicellular organism

• A) contain a subset of the genome.
• B) have the same function.
• C) express the same parts of the genome at the same time during development.
• D) have controlled expression of their genome.
• E) randomly express parts of the genome.

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Definitions:

Aortic Valve

A valve in the human heart between the left ventricle and the aorta that prevents blood from flowing back into the heart chamber after it has been ejected.

Cardiac Cycle

The sequence of events in the heart from the beginning of one heartbeat to the beginning of the next, encompassing systole and diastole phases.

Pericardium

The fibrous sac that encloses the heart, providing it with protection and a fixed position within the thorax.

Myocardium

The thick, muscular layer of the heart wall responsible for the heart's contracting action.