You saw examples of a few different types of specialized cells. Think about all

Question

You saw examples of a few different types of specialized cells. Think about all the various jobs that different parts of your body do for you. Can you name three more specialized cells. (it is okay to just describe them even if you do not have the specific biological names) What will you conclude if the negative control gives you positive results (e.g. you a purplish color development in test tube # 1 for the protein detection assay? What would be your next step? What will you conclude if the positive control gives you negative results (e.g. you add iodine to the starch solution and you do not get bluish black color development)? What would be your next step?

Explanation / Answer

6.Specialized cells of the body are-

Neurons. Neurons are specialized cells that carry messages within the human brain.

Muscle Cells- contains the protein actin amd myosin which are specialized for contraction and relaxation of muscles.

Sperm Cells. These are specialized gametes which help in reproduction and are found in males only.

7. Negative controls are groups where no phenomenon is expected. They ensure that there is no effect when there should be no effect. if the treatment group and the negative control both produce a negative result, it can be inferred that the treatment had no effect. If the treatment group and the negative control both produce a positive result, it can be inferred that a confounding variable is involved in the phenomenon under study, and the positive results are not solely due to the treatment.

8.Positive controls are often used to assess test validity. For example, to assess a new test's ability to detect a disease (its sensitivity), then we can compare it against a different test that is already known to work. The well-established test is the positive control, since we already know that the answer to the question (whether the test works) is yes.If the positive control does not produce the expected result, there may be something wrong with the experimental procedure, and the experiment is repeated. For difficult or complicated experiments, the result from the positive control can also help in comparison to previous experimental results. For example, if the well-established disease test was determined to have the same effectiveness as found by previous experimenters, this indicates that the experiment is being performed in the same way that the previous experimenters did.

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