Biology (T): Functioning Organisms
Biology Practical Report
Due 14th November 2012
Introduction: Homeostasis plays a vital role in the maintenance of a normal environment in which bodily systems are able to function most efficiently. The importance of homeostasis can be seen in blood pressure and pulse rate, as measurements which are not in the normal range can create serious health problems. Exercise has a known effect on both of these systems, as it results in a rise in body temperature and dilation of blood vessels, as well as an increase in breathing rate. By measuring how these rates return to normal levels after exercise demonstrates homeostasis in the body, and helps to describe the ways in which the endocrine system and organs involved impact this.
Aim: To demonstrate the role of homeostasis in reaching normal levels for pulse rate and blood pressure after an increase due to exercise and investigate which of the relative feedback systems works faster to achieve homeostasis.
1.5m Skipping Rope
Electric blood pressure monitor
Using the electric blood pressure monitor, both blood pressure and pluse rate were measured at a resting level for the first participant. In an open area, participant was asked to skip 100 times using rope, without any break. Immediately afterwards, the stopwatch was set and the blood pressure and pulse rate of the participant were measured using the blood pressure monitor and recorded. Using the stopwatch to see time after exercise, blood pressure and pulse rates were measured again at t=1, t=5 and t=10, where t equals minutes after exercising. The entire process was completed on each participant individually.
Table 1: Results for Participant 1
Time (t) |Pulse rate (bpm) |Blood pressure (mmHg) |...