Review
Here is what we have learned from this unit:
- The American Cancer Society defines cancer as "a group
of diseases characterized by uncontrolled growth and spread
of abnormal cells. If the spread is not controlled, it can
result in death."
- Cancer does not refer to a single disease. Rather, it
consists of more than 100 different diseases.
- A few cancer related terms are introduced: cancer, neoplasia,
tumor, neoplasm, and growth. Neoplasia, a synonym of cancer,
is often used by medical professionals. Neoplasm is a synonym
for tumor, which literally means "new growth." Several other
terms referring to abnormal cell growth which are not cancer
include: hyperplasia, metaplasia, and dysplasia.
- Cell biology of cancer defines the differences between
normal cells and cancer cells. Normal, healthy cells carry
out specific functions of the body and the cells' growth
is controlled by a complicated biochemical mechanism of
the body. Cancer cells grow in an uncontrolled manner and
are unable to recognize their own natural boundaries due
to faulty gene mutations in the cancer cells.
- Although scientists have not yet pinpointed an exact cause
for cancer, many factors have been identified that are likely
to cause development of cancer in the body. These factors
are called "cancer risk factors" and include smoking, diet,
genetics, occupation, environment, and infectious agents.
Quiz
To test how much you have learned from this unit, a true-false
quiz, including ten questions (two questions at a time in
five sets of questions) has been created to give you an opportunity
to reinforce what you have learned.
Since the quiz is created as an incentive for learning, rather
than an objective evaluation of learning results, the score
of the quiz will not be captured and will not be recorded.
Feedback to your answer is provided instantaneously.
These quiz questions are grouped into five sets of two questions
each to reduce the size of the content on each page. When
you finish the questions in one set, click the navigation
arrows in the Title Bar to go to the next page. Please click
here to take the quiz.
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