Cellular Respiration
What is Cellular Respiration?
The process cells use to break down glucose and release energy in the form of ATP.
Which gas do cells use?
Oxygen (O₂)
Where does gas exchange occur in the lungs?
In the alveoli.
What organ brings oxygen into the body?
The lungs.
What is a difference between cellular respiration and photosynthesis?
The inputs and outputs for both are switched.
What part of the cell does cellular respiration occur in?
In the mitochondria.
Which gas is produced by cells?
Carbon dioxide (CO₂)
Where does gas exchange occur in plants?
In the stoma/stomata.
What is the main organ for the circulatory system?
The heart
A person has low oxygen levels in their blood. How could this affect cellular respiration?
Aerobic cellular respiration may decrease, reducing ATP production.
What is the main energy molecule produced?
ATP (adenosine triphosphate)
Trace the path of O₂ in the body.
Lungs (Alveoli) → blood → body cells
What happens to O₂ at the alveoli?
Oxygen diffuses from the alveoli into the blood.
Explain how the respiratory and circulatory systems work together.
The respiratory system exchanges gases in the lungs, and the circulatory system transports oxygen to cells and carbon dioxide back to the lungs.
During exercise, muscle cells need more ATP. Explain why breathing rate increases.
Breathing rate increases to bring in more oxygen and remove the additional carbon dioxide produced by increased cellular activity.
What are the reactants and products of cellular respiration?
Reactants: glucose and oxygen
Products: CO2 + H2O + ATP
Where does CO₂ go after cells produce it?
It enters the blood and is transported to the lungs.
Define gas exchange.
The movement of O₂ and CO₂ between the body and its environment.
Where does your arteries carry blood to and from in your body?
Arteries carry blood away from the heart to the body or lungs.
What is one example for both negative and positive feedback loops?
Negative Feedback: sweating, shivering, blood glucose levels
Positive Feedback: child birth or blood clotting
Explain how cellular respiration and gas exchange are connected.
Gas exchange brings oxygen into the blood and removes carbon dioxide. Cells use oxygen for cellular respiration, which produces ATP and carbon dioxide.
Compare the paths of O₂ and CO₂.
O₂ travels from the alveoli into the blood and then to cells. CO₂ travels from cells through the blood to the alveoli, where it is exhaled.
What tiny blood vessels surround the alveoli and allow gases to move between the lungs and blood?
Capillaries
Where does your veins carry blood to and from in your body?
Veins carry blood toward the heart from the body or lungs.
What is the difference between aerobic and anaerobic respiration?
Aerobic respiration uses oxygen and produces much more ATP, while anaerobic respiration does not require oxygen and produces much less ATP.