The Nucleus of Helium-4 Contains

question 6

Multiple Choice

The nucleus of helium-4 contains

• A) one proton
• B) one proton and one neutron
• C) two protons and one neutron
• D) two protons and two neutrons
• E) three protons and two neutrons

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Definitions:

Biological Clock

An internal mechanism that regulates bodily rhythms and cycles, such as sleep and wakefulness, on a roughly 24-hour cycle.

Pineal Gland

A small endocrine gland in the brain that produces the hormone melatonin, which regulates sleep and wakefulness.

Melatonin

A hormone produced by the pineal gland that regulates sleep-wake cycles and is influenced by the presence of light.

Biological Clock

An internal mechanism in organisms that controls the cycle of biological processes and behaviors in a roughly 24-hour cycle.