Chapter 21: Cancer Development - Nurselytic

Correct Answer: B

Rationale: During the S phase, the cell must double its DNA content through DNA synthesis. Actual division, or mitosis, occurs during the M phase. Growing extra membrane occurs in the G1 phase. During the G0 phase, the cell is working but is not involved in any reproductive activity.

Correct Answer: D

Rationale: Apoptosis is programmed cell death. With this characteristic, organs and tissues function with cells that are at their peak of performance. Growth by cells enlarging is hyperplasia. Having the normal number of chromosomes is euploidy. Inhibition of cell growth is contact inhibition.

Correct Answer: C

Rationale: Benign tumors are basically normal cells growing in the wrong place or at the wrong time. Benign cells grow through hyperplasia, not involution. Benign tumor cells retain contact inhibition. Anaplasia is a characteristic of cancer cells.

Correct Answer: A

Rationale: Cancer cells do not have sufficient fibronectin and so do not maintain tight adhesion with other cells. This is part of the mechanism of metastasis. Chromosome alterations in cancer cells (aneuploidy) consist of having too many, too few, or altered chromosome pairs, but this does not necessarily lead to rapid cellular division. Rapid cellular migration is part of metastasis. Immortality is a characteristic of cancer cells due to telomerase activity.

Correct Answer: C

Rationale:
To decrease the risk of developing cancer, one should cut down on the consumption of red meats and animal fat. The other statements are correct.