Sci 9

What best describes breathing?

• The expansion of the chest muscles during exercise

• The transfer of oxygen into the blood in the alveoli

• The physical movement of air into and out of the lungs

• The chemical breakdown of oxygen inside cells

During inhalation, what happens to the diaphragm?

• Diaphragm stops moving

• Diaphragm curves upward

• Diaphragm relaxes

• Diaphragm contracts

When the rib cage rises up, what is created inside the chest cavity?

• High oxygen level

• Low oxygen level

• Complete vacuum

• Partial vacuum

Which sequence shows the correct order of events for breathing (inhalation followed by exhalation)?

• Air fills lungs → Diaphragm contracts → Rib cage expands (rises up) → Diaphragm relaxes → Rib cage lowers down → Air leaves lungs

• 
  Diaphragm relaxes → Rib cage lowers down → Air leaves lungs → Diaphragm contracts → Rib cage expands (rises up) → Air fills lungs

• Rib cage expands (rises up) → Diaphragm relaxes → Air fills lungs → Diaphragm contracts → Rib cage lowers down → Air leaves lungs

• Diaphragm contracts → Rib cage expands (rises up) → Air fills lungs → Diaphragm relaxes → Rib cage lowers down (relaxes) → Air leaves lungs

Which statement is true about breathing and respiration?

• Breathing and respiration are the same process of moving air and gases.

• Breathing is the intake of oxygen, while respiration is the exchange of oxygen and carbon dioxide in the body.

• Breathing is the movement of air to and from the lungs, while respiration is the process of using oxygen to produce energy.
  

• Breathing is the movement of air in and out of the lungs, while respiration is the movement of gases inside the body.

Gas exchange between blood and atmosphere/lungs

• internal respiration

• external respiration

Gas exchange between blood and body cells

• internal respiration

• external respiration

Which parts of the circulatory system are involved in this process of respiration?

• Blood and blood vessels

• Lungs, alveoli, and diaphragm
• Lungs and body cells

• Stomach, intestines, and liver

Which is true?

• The respiratory system discharges the carbon dioxide and breathes in oxygen, which is absorbed by the alveoli and assimilated into the circulatory system through the Red Blood Cells, and delivers the oxygen from the bloodstream to the tissues of the body.

• The respiratory system discharges the oxygen and breathes in carbon dioxide, which is absorbed by the alveoli and assimilated into the circulatory system through the Red Blood Cells, and delivers the oxygen from the tissues of the body to the bloodstream.

• The respiratory system discharges the oxygen and breathes in carbon dioxide, which is absorbed by the alveoli and assimilated into the circulatory system through the Red Blood Cells, and delivers the carbon dioxide from the bloodstream to the tissues of the body..

• The respiratory system discharges the carbon dioxide and breathes in oxygen, which is absorbed by the alveoli and assimilated into the circulatory system through the Red Blood Cells, and delivers the oxygen from the tissues of the body to the bloodstream.

What color is the area for Breathing?

• green

• purple

• red

• none