# Tutor profile: Thomas S.

## Questions

### Subject: Biology

Why is it useful that the affinity curve of myoglobin shows non-cooperativity?

You would want the affinity curve to show noncooperative because Myoglobin is useful in that it will hold onto oxygen as a reserve at normal levels of oxygen and has to drop off a lot of oxygen in high exerting tissues such as muscles. In muscles, the oxygen pressure can drop significantly and the demand for more is very high. That is the need that myoglobin can fulfill.

### Subject: Statistics

What is a p-value?

The p-value is your probability that the test statistic is a value that is at least as extreme as your observed test statistic value, given that your null hypothesis is true. That way if the p-value is less than to the chosen significance level, the observed data is not consistent with your null hypothesis. The p-value is NOT the probability that the null hypothesis is true, nor is it the probability that the alternative hypothesis is false.

### Subject: Anatomy

How do antiperspirants/deodorant work, what is the osmotic mechanism that is happening?

Most antiperspirants contain aluminum salts, which can be taken into cells. If aluminum is taken into cells lining the exocrine sweat glands, water outside of the cells will flow in (by osmosis, because of the higher solute levels), causing the cells to swell. This will block the gland, reducing sweating

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