Lesson Worksheet: The Breathing Process Science

In this worksheet, we will practice describing the movement of the ribs and diaphragm when breathing and explaining how these movements change the volume and pressure of the lungs.

Q1:

Which of the following can lead to an increase in lung volume?

  • AOld age
  • BAsthma
  • CSmoking
  • DRegular exercise

Q2:

Complete the sentence: When you breathe in, the muscles between your ribs in order to produce movement.

  • Arelax
  • Blengthen
  • Cstretch
  • Dcontract

Q3:

The figure shows the bell jar model used to show what happens during breathing.

What is done to the bell jar to show the process of exhaling?

  • AThe rubber sheet at the base is pulled down.
  • BAir is sucked out of the tube at the top.
  • CThe rubber sheet at the base is pushed up.
  • DAir is blown into the tube at the top.

Q4:

The figure shows the bell jar model, used to show what happens during breathing.

In what way does this model not represent the respiratory system during breathing?

  • AThe balloons do not inflate when the rubber sheet is pulled down.
  • BThe bell jar does not show the movement of the ribs.
  • CAir is not forced out of the balloons when the rubber sheet is pushed up.
  • DThe tube at the top branches into two tubes.
  • EThe position of the rubber sheet is not the same as the diaphragm.

Q5:

The figure shows the bell jar model used to show what happens during breathing.

What part of the respiratory system does the rubber sheet at the bottom represent?

  • ADiaphragm
  • BRib cage
  • CLungs
  • DTrachea

Why do the balloons inflate when the rubber at the base of the jar is pulled downward?

  • ABecause it decreases the volume of the jar, decreasing the pressure inside
  • BBecause it decreases the volume of the jar, increasing the pressure inside
  • CBecause it increases the volume of the jar, increasing the pressure inside
  • DBecause it increases the volume of the jar, decreasing the pressure inside

Q6:

A student measures their lung volume by taking a deep breath and exhaling as much as possible into a plastic bottle filled with water. The result before and after exhaling is shown in the figure. Each graduation represents 200 cm3. What is the student’s lung volume in cubic decimeters?

Hint: 1=1,000dmcm.

Q7:

A spirometer, shown in the figure, is a machine that measures breathing patterns.

The results for a person at rest on the spirometer is shown in the figure.

Which point (A, B, C, or D) shows the lungs at the end of exhalation?

  • AA
  • BB
  • CC
  • DD

One breath is defined as the process of breathing in and then breathing out.

How many breaths does the person shown in the figure make in 30 seconds?

This lesson includes 2 additional questions for subscribers.

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