Purpose:The lab all set will teach you exactly how to measure blood pressure. Learn where systolic and diastolic press begins. Next observe venous return, heart rate, and blood press in three different scenarios including: typical range, relaxing rate, and also increased exercise.

You are watching: Why is pressure a sensible reading to measure circulatory health

Research:In the circulatory system lab, student observed how physical task affects blood pressure and also heart rate. With a partner, one student’s push was taped at basal (normal) rate, lie down, and also after exercising. Common blood pressure is systolic 120 and also diastolic 80.


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A regular heart price is 60 beats per minutes. Systolic push is the pressure of blood throughout contraction and would be considered as the first twitch that the stethoscope. Diastolic pressure is the press in the blood ship in in between heartbeats in ~ a relaxation point and would be the critical twitch prior to the needle drops fully on the stethoscope.

These points are thought about as lub & dub. Lub or S1 is the very first heart beat and also the closing of the tricuspid & bicuspid valves.


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The second heart beat, s2 is dub, the close up door of semilunar valves. Blood pressure and also heart rate increase after physical task due to the fact that the human body uses an ext oxygen and releases higher volumes the carbon dioxide. In ours experiment the test subject needed more oxygen when exercising. The 25 jumping jacks preformed increased blood pressure and heart rate. If the test to be preformed top top a different test topic results might change, escape on body mass, weight, height, masculine or female.

Hypothesis:If physical activity increases, climate blood pressure and heart rate will rise.


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Materials:•Stethoscope • Test subject •Watch • administer •Sphygmomanometer (Blood pressure cuff)

Data/Results:Table 2: Blood Pressure and Pulse ReadingActivityBlood Pressure(mmHg)Systolic/DiastolicPulse(beats/minute)Basal (Normal)120/7560Lying down120/6056After exercise140/8068

Lab Questions:

1. What is systolic pressure?

Systolic blood push is the pressure as soon as the heart ventricles contract and also pump blood the end of the heart. This is the highest possible pressure in the blood vessels.

2. What is diastolic pressure?

Diastolic push is the pressure in between heart beats as soon as the heart ventricles room resting and also filling through blood. This is the lowest push in blood vessels

3. Why is press a judicious reading to circulatory health?

Because through pressure, human being can determine exactly how much blood are pumped the end of the heart in a solitary contraction. A human with a healthy circulation‘s blood pressure should be in ~ the typical level.

4. Define the “lub-dub” sound of the heartbeat?

“Lub-Dub” is the first and 2nd heart sounds the are plainly heard v a stethoscope. These sounds room the closing of the heart valves. •The very first heart sound, recognize as “lub” starts as soon as the ventricles contract. The atrioventricular valves room closed and the blood is pumped out of the heart. The 2nd heart sound, well-known as “dub”, starts as soon as the ventricles relax. The semilunar valves are closed and the ventricles are filled.

5. Why do blood pressure and heart rate change after exercise?

The muscles in the body need much more oxygen during exercise. The heart then pumps an ext blood to the lungs for gas exchanging. Since the heart requirements to contract harder, the blood pressure and also heart rate will it is in increased.

6. How could the outcomes in Table 2 adjust if someone else performed the activities? Why?

The outcomes in Table 2 would be lower or higher if someone else performed the tasks because the sex, height, weight, and health could also impact the results.

7. Why is it necessary for blood to flow in just one direction?

Every part of person body needs oxygen in stimulate to do works properly. Oxygen-rich blood offers oxygen essential to every component of the body and oxygen-poor blood demands to flow to the lung to exchange gas. If blood flows backward, the body will certainly not get the oxygen it needs to keep normal homeostasis as such it will be under a significant threatening.

Conclusion/Discussion:In this experiment, we experienced that the blood pressure and heart rate far-reaching increased ~ the subject exercised. Native table 2, we saw that the blood pressure increased from 120/75 to 140/80 and also the pulse raised from 60 beats /minute to 68 win /minute ~ exercised. The price of blood pressure and also pulse were lowest as soon as the subject lied down, which just 120/60 mmHg because that blood pressure and 56 beats/minute because that the pulse. Due to the fact that the blood pressure and heart rate elevated as body activity increased, us concluded that this is a statistically significant result.

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Theory:Blood push measurements usually reflect arterial blood pressure. The high and low clues of blood pressure are expressed in millimeters of mercury (mmHg). The normal blood press in healthy and balanced individual is 120/80(mmHg). Blood press is commonly measured with the sphygmomanometer (blood press cuff) which typically composed that a cuff through an inflatable bladder and a mechanical manometer with a rubber bulb.


Affects that Physical task on the love Rate and also Blood Pressure. (2016, Aug 20). Retrieved native https://bsci-ch.org/affects-of-physical-activity-on-the-heart-rate-and-blood-pressure-essay