The Mass Number Is Equal to the Number of What

question 76

Multiple Choice

The mass number is equal to the number of what particles in the nucleus?

• A) protons
• B) neutrons
• C) nucleons
• D) electrons
• E) positrons.

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Definitions:

Pulmonary Trunk

The major blood vessel transporting deoxygenated blood from the right ventricle of the heart to the lungs.

Pacemaker Potential

Pacemaker potential refers to the spontaneous gradual depolarization of the membrane potential in pacemaker cells, leading to the initiation of action potentials in certain heart cells.

SA Node

The sinoatrial node, often described as the heart's natural pacemaker, initiating the electrical impulses that set the pace for cardiac rhythm.

Voltage-gated

Refers to ion channels that open or close in response to changes in electrical potential across a cell's membrane.