summary questions
1. do you see a pattern to the class data? if so, what is it? if not, explain why you think a pattern does not exist.
2. a question that someone might ask about pulse rate is is there a connection between height and pulse rate? based on the information obtained from this activity, can you tell if there is a connection between a persons height and the persons average pulse rate? if so, explain the relationship and how you can tell it exists. if not, what additional data would you need to collect to find out if there is a connection?
3. state another question that someone might ask about pulse rate that could be answered by doing an experiment.
extension
when you exercise you use up available o2 & glucose in your cells to make atp. once the o2 is gone you still break down glucose in lactic acid fermentation. the process that allows you to make atp when you dont have enough o2. a condition known as muscle fatigue occurs when the waste product of the muscle activity (lactic acid) build up in the cells. until these waste chemicals are removed by o2 the fatigue will continue.
1. muscle fatigue is when our muscles are tired. what happens in our muscle cells when we experience muscle fatigue?
2. why is someone breathing so hard after a strenuous (difficult) run?
3. what does an increased pulse rate indicate about the heart rate?
4. when muscles are active, cells use nutrients & o2 at a high rate and produce waste chemicals and heat more rapidly. describe how the interaction of 2 or more body systems help to maintain homeostasis during a period of high activity.

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Accepted Answer

# Summary Questions
## 1.
# Brief Explanations:
Without seeing the class - data, it's impossible to determine if there is a pattern. If there is a pattern, it could be a linear relationship, clustering, or some other recognizable form in the data points. If not, it might be due to randomness or insufficient data.
# Answer:
Cannot be determined without class - data.

## 2.
# Brief Explanations:
Based on the given information, we cannot tell if there is a connection. To find out, we would need to collect paired data of height and average pulse rate for a sufficient number of individuals and then analyze the data (e.g., by creating a scatter - plot and calculating a correlation coefficient).
# Answer:
No, need to collect paired height and average pulse rate data for more individuals.

## 3.
# Brief Explanations:
An example question could be "Does the type of food eaten before measuring pulse rate affect the pulse rate?" This can be answered by having participants eat different types of food and then measuring their pulse rates.
# Answer:
Does the type of food eaten before measuring pulse rate affect the pulse rate?

# Extension
## 1.
# Brief Explanations:
When we experience muscle fatigue, lactic acid builds up in the muscle cells due to lactic acid fermentation as the cells try to produce ATP in the absence of sufficient oxygen.
# Answer:
Lactic acid builds up in muscle cells due to lactic acid fermentation.

## 2.
# Brief Explanations:
After a strenuous run, someone is breathing hard because the body needs to take in more oxygen to remove the lactic acid (waste product) that has accumulated in the muscles during anaerobic respiration and to replenish the oxygen debt.
# Answer:
To take in more oxygen to remove lactic acid and replenish oxygen debt.

## 3.
# Brief Explanations:
An increased pulse rate indicates an increased heart rate. The heart is pumping blood more rapidly to deliver more oxygen and nutrients to the active muscles and remove waste products.
# Answer:
An increased heart rate; heart is pumping blood more rapidly.

## 4.
# Brief Explanations:
During high - activity periods, the circulatory and respiratory systems interact. The respiratory system takes in oxygen and expels carbon dioxide, and the circulatory system transports oxygen to the muscles and removes carbon dioxide and other waste products. The muscular system also works with the circulatory system as the heart (a muscle) pumps blood.
# Answer:
The circulatory and respiratory systems interact to transport oxygen and remove waste; the muscular system (heart) pumps blood.

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