The Relationship ,Where a Is the Mass Number of a Nucleus and a Nucleus

question 11

Multiple Choice

The relationship
,where A is the mass number of a nucleus and r is it radius,implies which of the following about nuclei?

• A) Nuclei are cubic.
• B) Different nuclei have the same density.
• C) Neutrons in nuclei attract each other even though they have no charge.
• D) Nuclei tend to have the same ratio of protons to neutrons.

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Definitions:

Cardiac Muscle Tissue

Tissue composed of cells that form the myocardium of the heart, responsible for the rhythmic contractions that pump blood.

Myocardium

The thick, muscular middle layer of the heart wall, composed of cardiac muscle cells that contract to pump blood through the circulatory system.

Chordae Tendineae

Heart strings, or thin bands of fibrous tissue, that attach to the heart valves and are responsible for preventing the inversion of these valves during heart contraction.

Aortic Arch

The curved portion of the aorta, the major artery in the body, from which the head, neck, and upper limb arteries originate.