General Biology I - Human Perspectives Essay Example | Topics and Well Written Essays - 750 words

General Biology I - Human Perspectives - Essay Example The heart rate was minimum (51) at rest under normal conditions but found maximum (71) after drinking caffeine in the shape of coffee. Exercise for a minute did not significantly change heart rate as compare to working in the office as hypothesised. This indicated that working in the office also needed extra energy comparable with short exercise. Heart rate after eating and digesting food was similar to exercise for one minute. This is why cardiologists advise heart patients to avoid exercise or walk for at least two hours after taking meals. Drinking coffee increases heart rate but the recent research indicated that it is beneficial for heart diseases in moderate quantity in elderly people ( James et el, 2007). Coffee has oxidative properties which keep the LDL cholesterol level under low levels and chances of getting cardiovascular disease are minimal. Heart beats per minute were expected to be equal to or lower than resting time but in my case it was higher. The probable cause for this change may be dreams immediately before wake up which resulted in elevated heart rate. 3. Trained athletes have resting pulse rate at 40-60 as their metabolism has adjusted to exercise. Therefore exercise is recommended for proper body functioning and keeping healthy heart. My resting pulse rate is also low because I exercise regularly. It means my heart need to work less as compare to persons whose heart rate at resting is 70-72 beats per minute. 4. I calculated my BMI using standard BMI calculator given by National Institute of Health. My height is 5’ 5† and weight 152 pounds. The BMI come to 25.3 which are on the higher side of the normal range (18.5 – 24.9) of NIH standards. My BMI does surprise me because I have kept my body weight within limit. I take care of my food and exercise regularly. Therefore, my heart rate is lower and it is expected that I have low risk of mortality due to heart problems. 5. People who have criticized BMI have

On the debates pertaining to inference of an effect from its cause Essay

On the debates pertaining to inference of an effect from its cause - Essay Example 172). Taking off from Hume, John Stuart Mill â€Å"held that causal inference depends on three factors: first, the cause has to precede the effects; second, the cause and effect have to be related ; and third, other explanations of the cause-effect relationship have to be eliminated† (Cook and Campbell 1979, p. 182). In other words, the notion of causation and effect that can be found in the ideas of John Stuart Mill is that causation requires precedence of the cause from the effect, correlation, and that rival hypotheses are ruled out. For Cook and Campbell (1979), however, the most significant contribution of John Stuart Mill to the theory of causality pertains to his notions of the criteria, principles, or â€Å"methods† of agreement, differences, and concomitant variation. The principle of agreement â€Å"states that an effect will be present when the cause is present† (Cook and Campbell 1979, p. 182). The principle of difference â€Å"states that the effect will be absent when the cause is absent† (Cook and Campbell 1979, p. 182). Finally, the principle of concomitant variation â€Å"implies that when both of the above relationships are observed, causal inferences will be all stronger since certain other interpretations of the co-variation between the cause effects can be ruled out† (Cook and Campbell 1979, p. 182). According to Cook and Campbell (1979, p. ... 183) pointed out that â€Å"the concept of a control group is implicit here and is clearly central in Mill’s thinking about cause.† In 1913, Bertrand Russell â€Å"looked to physics and astronomy of his day as the most mature sciences, and he noted their lack of concern with unobservables and explicitness and parsimony of the functional relationships that physicists sought to test† (Cook and Campbell 1979, p. 172-173).1 However, Russell had asked that asked whether the concept of cause continues to be relevant given that cause â€Å"is not implied by functional relationships of mathematical form† (Cook and Campbell 1979, p. 173). The Russell viewpoint is positivist â€Å"rejecting unobservables (like cause), and seeking to establish explicit functional laws between continuously measured variables in a closed system† (Cook and Campbell 1979, p. 173). Positivists like Russell believe that â€Å"causation is unnecessary because it is unobservable† (Cook and Campbell 1979, p. 175). The essentialist viewpoint â€Å"argue that the term cause should only be used to refer to variables that explain a phenomenon in the sense that these variables, when taken together, are both necessary and sufficient for the effect to occur† (Cook and Campbell 1979, p. 177). The essentialists â€Å"equates cause with a constellation of variables that necessarily, inevitably and infallibly results in the effect† (Cook and Campbell 1979, p. 177). In contrast, those â€Å"who restrict cause to observable necessary and sufficient conditions (or sufficient conditions that operate when all the necessary conditions are met) reject as causes those factors which are known to bring about effects sometimes, but not always† (Cook and Campbell 1979, p. 177).