Which Statement Explains Why Isotopes Have Different Mass Numbers

question 62

Multiple Choice

Which statement explains why isotopes have different mass numbers?

• A)Isotopes differ in the number of protons each contains.
• B)Isotopes differ in the number of electrons each contains.
• C)Isotopes differ in the number of neutrons each contains.
• D)Isotopes differ in the number of protons and neutrons each contains.
• E)Isotopes differ in the number of protons and electrons each contains.

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Definitions:

Ghrelin Protein

A hormone produced mainly by the stomach that stimulates appetite and signals the brain to increase food intake.

Leptin Protein

A hormone produced by fat cells that helps to regulate body weight by signaling satiety to the brain.

Glucose Receptors

Proteins on the cell surface or within cells that bind glucose and facilitate its transport into the cell, playing a critical role in regulation of blood sugar levels.

Blood Sugar

the concentration of glucose present in the blood, essential for energy production in the body but requiring regulation for health.