The Scientific Method
What is the first step of the scientific method?
Making an observation.
What is the main muscle involved in breathing?
The diaphragm.
What type of blood cells are responsible for carrying oxygen?
Red blood cells.
What is pulse rate a measure of?
The number of heartbeats per minute.
What is the primary purpose of respiration?
To exchange gases (oxygen and carbon dioxide)
What do you call a testable prediction in the scientific method?
A hypothesis.
What are the two types of muscles in the human body?
Skeletal and smooth muscles
What is the function of platelets?
To help with blood clotting.
Name a common site to check pulse rate.
The wrist (radial pulse).
What are the two main types of respiration?
The process with oxygen and the process without oxygen.
What is the purpose of conducting an experiment?
To test a hypothesis.
What happens to your diaphragm when you inhale?
It contracts and moves downwards.
How do muscles receive oxygen-rich blood?
Through arteries, specifically the coronary arteries.
What factors can affect pulse rate?
Activity level, stress, and health status.
In which part of the cell does the process with oxygen take place?
In the mitochondria.
After analyzing data, what is the next step in the scientific method?
Drawing a conclusion.
What is the primary function of the intercostal muscles?
To assist in expanding and contracting the ribcage during breathing.
What is the role of hemoglobin in blood?
To transport oxygen from the lungs to the body tissues.
Count the beats for 60 seconds to get the beats per minute (BPM).
How does the body respond when there are high levels of carbon dioxide in the blood?
The body increases breathing rate to remove carbon dioxide and take in more oxygen.
What is the difference between a theory and a hypothesis?
A theory is a well-substantiated explanation, while a hypothesis is a testable prediction.
How does exercise affect breathing rate and depth?
It increases both to supply more oxygen and remove carbon dioxide.
How does physical activity impact blood circulation in muscles?
It increases blood flow to muscles, enhancing oxygen delivery and nutrient supply.
Count the beats for 60 seconds to get the beats per minute (BPM).
What change occurs in your muscles when they are working hard and oxygen levels are low?
They switch to a different energy process that produces less energy.