A nurse is learning the difference between normal cells and benign tumor cells. What information does this include?
Benign tumors have lost their cellular regulation from contact inhibition.
Growing in the wrong place or time is typical of benign tumors.
Benign tumors grow through invasion of other tissue.
The loss of characteristics of the parent cells is called anaplasia.
The Correct Answer is B
Choice A rationale:
Contact inhibition is a normal mechanism that regulates cell growth. When normal cells come into contact with each other, they stop growing. This prevents uncontrolled growth and the formation of tumors.
Benign tumor cells do not typically lose contact inhibition. They still respond to contact signals from neighboring cells and stop growing when they come into contact with each other.
However, they may grow in an uncontrolled manner due to other factors, such as mutations in genes that regulate cell growth.
Choice C rationale:
Invasion is a characteristic of malignant (cancerous) tumors, not benign tumors. Malignant tumors have the ability to invade surrounding tissues and spread to other parts of the body.
Benign tumors, on the other hand, are localized and do not invade surrounding tissues. They may grow and compress nearby tissues, but they do not spread.
Choice D rationale:
Anaplasia is a term used to describe the loss of differentiation of cells in a tumor. This means that the cells no longer resemble the normal cells from which they originated.
Anaplasia is a characteristic of malignant tumors, not benign tumors. Benign tumor cells typically retain some of the characteristics of the parent cells.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A rationale:
Tolerance to the opiate medication is developing. This is the most likely explanation for why the client's pain is no longer being controlled by the same dose of medication. Tolerance is a physiological adaptation that occurs with repeated exposure to opioids, leading to a decrease in their effectiveness over time. This means that the client's body is becoming less responsive to the medication, and a higher dose is needed to achieve the same level of pain relief.
Choice B rationale:
There is likely a history of addiction. While it is possible that the client has a history of addiction, this is not the most likely explanation for why the medication is no longer controlling the pain. Addiction is a complex condition that is characterized by compulsive drug seeking and use, despite negative consequences. It is not simply a matter of tolerance developing.
Choice C rationale:
The client is opiate naive. This means that the client has not previously been exposed to opioids. While opiate-naive clients may be more sensitive to the effects of opioids, they are also more likely to experience side effects, such as nausea and vomiting. The fact that the client has been receiving the same dose of medication for 2 days without experiencing side effects suggests that they are not opiate naive.
Choice D rationale:
Physical dependence. Physical dependence is a state of adaptation that occurs with repeated exposure to opioids, leading to withdrawal symptoms if the medication is abruptly stopped. However, physical dependence does not necessarily mean that the medication is no longer effective in controlling pain.
Correct Answer is B
Explanation
Choice A rationale:
While advancing age is a significant risk factor for cancer, it is not considered the single biggest risk factor. The risk of developing cancer does increase with age, primarily due to the accumulation of DNA damage over time. This damage can arise from various sources, including exposure to carcinogens, errors in DNA replication, and oxidative stress. With age, the body's ability to repair DNA damage also declines, making cells more susceptible to cancerous changes.
However, it's important to note that cancer can develop at any age, and even younger individuals can be affected if exposed to other significant risk factors.
Choice B rationale:
Exposure to tobacco is widely recognized as the single biggest risk factor for developing cancer. It is estimated to be responsible for about 25-30% of all cancer deaths worldwide.
Tobacco smoke contains over 70 known carcinogens, which are substances that can damage DNA and lead to cancer. These carcinogens can affect various organs in the body, including the lungs, mouth, throat, esophagus, stomach, pancreas, liver, bladder, kidney, cervix, and colon.
The risk of cancer increases with the amount and duration of tobacco use. Even exposure to secondhand smoke can increase the risk of cancer.
Quitting tobacco use is the most effective way to reduce the risk of cancer.
Choice C rationale:
Exposure to occupational chemicals is a known risk factor for certain types of cancer, such as lung cancer, bladder cancer, and leukemia. However, it is not considered the single biggest risk factor for developing cancer overall.
The risk of cancer from occupational chemicals depends on the specific chemical, the level of exposure, and the duration of exposure.
Workplace safety measures, such as using protective equipment and limiting exposure to hazardous chemicals, can help reduce the risk of cancer.
Choice D rationale:
Infection with certain viruses, known as oncoviruses, can increase the risk of developing certain types of cancer. For example, infection with human papillomavirus (HPV) can increase the risk of cervical cancer, and infection with hepatitis B virus (HBV) can increase the risk of liver cancer.
However, oncoviruses are not considered the single biggest risk factor for developing cancer overall. Vaccines are available to protect against some oncoviruses, such as HPV and HBV.
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