In the Proton-Proton Chain

question 33

Multiple Choice

In the proton-proton chain

• A) no neutrinos are produced.
• B) energy is released because a hydrogen nucleus has a greater mass than a helium nucleus.
• C) no photons are produced.
• D) carbon serves as a catalyst for the nuclear reaction.
• E) energy is produced in the form of gamma rays and the velocity of the created nuclei.

---

Definitions:

Positron Emission Tomography

A nuclear medicine functional imaging technique that produces a three-dimensional image of functional processes in the body.

Cingulectomy

A neurosurgical procedure that involves removing or disconnecting parts of the cingulate gyrus to treat certain psychiatric disorders.

Psychosurgery

Surgical procedures on the brain intended to relieve or control severe or violent psychological disorders.

Hemispheres

Half of the spherical brain, divided into the right and left hemispheres, each controlling specific functions and activities.