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Does this chemical reaction to burn food happen inside our bodies?
Lesson Objectives...
Analyze and interpret data to identify spatial and temporal relationships in order to determine causes for changes to blood glucose, oxygen, and carbon dioxide levels in the body.
Obtain, evaluate, and communicate information to clarify a claim that a chemical reaction that produces energy in the body is occurring in different parts of the body and that the body uses more glucose and oxygen to provide energy to cells (effect) during exercise (cause) than while resting
Resources for Lesson 12...
Resources for Lesson 12...
BTB Investigations
BTB Investigations
Observe the food label and videos to figure out where carbon dioxide is. Bromothymol blue (BTB) is an indicator (chemical) that turns a different color when it mixes with carbon dioxide. Record your observations in your science notebook.
Let's observe the color changes that occur with a know source of carbon dioxide (carbonated water) and a control (water alone).
Demonstration of BTB Mixed with Water Only
Demonstration of BTB Mixed with Water Only
Observe what happens when BTB is mixed with water only.
Demonstration of BTB Mixed with Water and Carbon Dioxide (Carbonated Water)
Demonstration of BTB Mixed with Water and Carbon Dioxide (Carbonated Water)
Observe what happens when BTB is mixed with carbonated water.
Demonstration of BTB Mixed with Air from Our Lungs
Demonstration of BTB Mixed with Air from Our Lungs
Observe what happens when BTB is mixed with air from our lungs.
Following the Path of Air in Our Lungs
Following the Path of Air in Our Lungs
Tiny air sacs (alveoli) line the sides of these air passages. What other structures do you predict you would see in this part of the lung tissue?
This image shows some of the structures found along these air sacs, or alveoli, within lung tissue.
This image zooms in on one of the air sacs, or alveoli, to reveal structures along the lining.
Comparing What We Know About Glucose to What We Breathe
Comparing What We Know About Glucose to What We Breathe
Analyze Oxygen and Carbon Dioxide Levels in the Blood
Analyze Oxygen and Carbon Dioxide Levels in the Blood
Cells Using Oxygen in the Body
Cells Using Oxygen in the Body
Glucose Levels in the Body
Glucose Levels in the Body
What we figured out this lesson...
What we figured out this lesson...
Oxygen is taken in (inhaled) through the lungs, and carbon dioxide is exhaled through them. These gases enter and exit the blood by passing through the lung membrane wall and are transported to and from the cells of the body.
Chemical reactions that happen within cells inside the body rearrange glucose and oxygen into carbon dioxide, water, and energy that the cells in the body can use.
This reaction, which is called cellular respiration, happens when we're resting, but it happens even more when we exercise.
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