Nokea
The student nurse learning about cellular regulation understands that which process occurs during the S phase of the cell cycle?
- A. Actual division (mitosis)
- B. Doubling of DNA
- C. Growing extra membrane
- D. No reproductive activity
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.
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A student nurse asks its nursing instructor what apoptosis means. What response by the instructor is best?
- A. Growing by cells enlarging
- B. Having the normal number of chromosomes
- C. Inhibition of cell growth
- D. Programmed cell death
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.
The nursing instructor explains the difference between normal cells and benign tumor cells. What information does the instructor provide about these cells?
- A. Benign tumor cells are benign tumor cells are benign tumor cells.
- B. Benign tumors have lost their cellular regulation from contact inhibition.
- C. Growing in the wrong place or time is typical of benign tumors.
- D. The loss of characteristics of the parent cells is called anaplasia.
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.
A group of nursing students has entered a futuristic science contest in which they have developed a cure for cancer. Which treatment would most likely be the winning entry?
- A. Artificial fibronectin infusion to maintain tight adhesion of cells
- B. Chromosome repair to stop rapid division of cancer cells
- C. Synthetic enzyme transfusion to allow rapid cellular migration
- D. Teleomerase therapy to maintain chromosomal immortality
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.
Which statement by the client indicates the nurse needs to provide additional teaching?
- A. Foods high in vitamin A and vitamin C are important.
- B. I'll have to cut down on the amount of bacon I eat.
- C. I'm so glad I don't have to give up my juicy steaks.
- D. Vegetables, fruit, and high-fiber grains are important.
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.
The nursing student learning about cancer development remembers characteristics of normal cells. Which characteristics does this include? (Select all that apply.)
- A. Differentiated function
- B. Large nucleus-to-cytoplasm ratio
- C. Loose adherence
- D. Nonmigratory
- E. Specific morphology
Correct Answer: A,D,E
Rationale: Normal cells have the characteristics of differentiated function, nonmigratory, specific morphology, a smaller nucleus-to-cytoplasm ratio, tight adherence, and orderly and well-regulated growth.