How do the respiratory and circulatory systems work together to transport gases around the body?

Question 1

How do the respiratory and circulatory systems work together to transport gases around the body?

Answer 1

The respiratory system takes in oxygen, while the circulatory system transports oxygenated blood to the organs and tissues. Carbon dioxide is removed and replaced for oxygen from the lungs. This procedure makes sure that oxygen and waste are delivered throughout the body.

Question 2

What is heart rate a measurement of?

Answer 2

The heart rate measures how many times the heart beats to the lungs and around the body. There are 2 stages in the beating of a heart

• first is when the heart is filled with blood, diastole.
• The second part is when the heart is pumping blood out of the heart by the heart muscles contracting, also called systole.

Question 3

What is the breathing rate a measurement of?

Answer 3

Breathing rate is the number of breaths per minute, and a higher rate means more gas exchange. During exercise, breathing rate increases to meet the body’s oxygen needs. This improves oxygen delivery to muscles and removes waste gases more efficiently.

Question 4

How and why are heart and breathing rates different at rest compared to during and after exercise?

Answer 4

During rest, the body requires less oxygen, so the heart and breathing rates slow down. During exercise, the rates increase to meet the higher oxygen demand by working muscles. After exercise, as oxygen needs decrease, the rates gradually return to resting levels. These changes enhance oxygen delivery, waste removal, and overall performance.

Question 5

How does the body’s demand for energy (ATP) change during exercise and how is this demand met?

Answer 5

The body demands more ATP energy during exercise for muscle action, respiration, and essential activities. To meet this requirement, the body creates ATP using a variety of processes, including the
- use of stored energy,
- the breakdown of glucose through glycolysis,
- use of oxygen to break down glucose, fatty acids, and amino acids.

Question 6

Procedure

Answer 6

Design an experiment to investigate the effect exercise has on breathing rate and heart rate

Question 7

Aim

Answer 7

How interval exercise affects breathing and heart rate by monitoring changes during and after the exercise.

Question 8

Hypothesis

Answer 8

If we increase the time that an exercise is performed, then the breathing rate and the heart rate will increase.

Question 9

Dependent variable

Answer 9

being measured. In this experiment, the breathing rate and heart rate of the participant(s) is the dependent variable.

Question 10

Independent variable

Answer 10

being changed in the experiment. In this experiment, the independent variable is the intervals of how long the exercise is being done for.

Question 11

Controlled Variable

Answer 11

what will stay the same throughout the experiment? In this experiment, there are three controlled variables, like the:
- Minutes, the person doing the exercise, and the exercise itself.

• As the exercise duration increased, both the breathing rate and heart rate also increased, indicating a greater need for oxygen and energy.
• The person doing the exercise is Chanula, and his exercise, which has been decided collectively within the group, is jumping jacks.

Question 12

Method

Answer 12

1. Set up a group of people with 2-3 people
2. Collect the necessary equipment
3. Come up with an exercise that will get the heart rate up and the breathing rate up consistently
4. Complete exercise with the intervals
5. Measure breathing rate and heart rate
6. Record the results in the table.

Question 13

Equipment list

Answer 13

Stopwatch/timer
FitBit/measuring device
Laptop

Question 14

Discuss whether your results supported (not proved) your hypothesis or not

Answer 14

The table’s data support the idea that increasing the length of exercise increases breathing rate and heart rate. This is shown when Chanula does “Jumping Jacks” for 3 minutes and 4 minutes 30 seconds. His breathing rate increases from 44 to 52 breaths per minute, and his heart rate increases from 171 to 205 beats per minute.

Question 15

Were the results for your trials consistent or really different?
▪ What does this tell you about the way you did your experiment?

Answer 15

the trial results differed in heart rate and breathing rate. To improve the experiment’s accuracy, we must do the exercises regularly and take measurements for each interval. By reflecting on the differences and analyzing our approach, we can improve the consistency of future trials

Question 16

Describe the results shown in your graph
▪ Is there an increase in heart rate and breathing rate? Why did that occur (use
the information in your background section to help explain)

Answer 16

Graph shows exercise gets harder and lasts longer, both the heart rate and breathing rate go up. This is because our muscles need more oxygen, so we breathe faster to take in more oxygen and our hearts beat faster to deliver oxygen-rich blood. To meet the increased oxygen demand during exercise, the body increases the heart rate and breathing rate.

Question 17

Did you have any difficulties doing the investigation?

Answer 17

Yes. At first, we had some difficulties preparing for this experiment as none of the group members had a Fitbit or a heart rate measuring device, and no stopwatch as well. When we were doing the practical part of it, we had to wait for one of the other groups to finish with their stopwatch so we could use it. Because of this difficulty, we were on a tight schedule for the practical part of the experiment.

Question 18

Conclusion
o State again whether your results support your hypothesis or not. Give a brief
summary of the following:

Answer 18

In our experiment, we aimed to accurately measure heart rate and breathing rate. We had Chanula do jumping jacks for various durations while measuring his heart rate with a Fitbit. His heart rate and breathing rate increased as he performed more difficult exercises. This demonstrated that the body responds to increased intensity by working harder. These measurements can be used to adjust workout intensity and track cardiovascular fitness.