Sarah has thyroid cancer. As part of her treatment, she is given an injection of radioactive iodine (I-131) that will be absorbed by her thyroid, helping target those cells. This is an example of
A. low-dose internal radiation.
B. chemotherapy.
C. interstitial brachytherapy.
D. systemic radiation therapy.
E. external radiation therapy.
Answer: D
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What do you know about electronegativity?
What will be an ideal response?
In which type of microscopy is a beam of electrons used to scan the specimen, followed by the conversion of the
excited electrons to a three-dimensional image?
a. confocal laser scanning microscopyb. phase-contrast microscopy c. bright field microscopy d. scanning electron microscopy e. fluorescence microscopy
Body cells of human females contain _____
a. one X chromosome b. two X chromosomes c. one Y chromosomes d. two Y chromosomes e. one X and one Y chromosome