Anatomy Final Exam Test 4

Which two organ systems are responsible for gas exchange in the body?

• Digestive and nervous systems

• Cardiovascular and respiratory systems

• Muscular and skeletal systems

• Endocrine and lymphatic systems

What happens to blood pH when CO2 levels rise in the bloodstream?

• Blood pH increases

• Blood pH decreases

• Blood pH remains the same

• Blood pH becomes neutral

Tags

NGSS.HS-LS1-3

What is the effect of breathing into a paper bag on CO2 levels and blood pH?

• Decreases CO2 levels, increases blood pH

• Increases CO2 levels, decreases blood pH

• Increases CO2 levels, increases blood pH

• Decreases CO2 levels, decreases blood pH

Tags

NGSS.MS-LS1-3

Which process involves the movement of oxygen out of the alveoli into the blood?

• Osmosis

• Diffusion

• Filtration

• Active transport

What is the primary site of nutrient absorption in the digestive system?

• Stomach

• Large intestine

• Small intestine

• Esophagus

Tags

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How do enzymes affect chemical reactions?

• They slow down reactions

• They stop reactions

• They speed up reactions

• They have no effect on reactions

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NGSS.MS-PS1-5

oxygen moves from areas of high concentration in the blood stream to low concentration into body cells through ____

• cellular respiration

• Diffusion

• Active Transport
• Osmosis

Lungs and capillaries both have porous linings that allow certain substances to move into or out of the structures. Which function do these porous linings MOST LIKELY serve in living organisms?

• heat release

• gas exchange

• carbohydrate absorption

• osmotic pressure regulation

Answer explanation

In the lungs, oxygen from the environment is exchanged for carbon dioxide in the blood. This is essential for cellular respiration to occur.

Tags

NGSS.MS-LS2-1

Humans breathe more rapidly during exercise than before it because during exercise the blood contains

• a decreased amount of hemoglobin
• a decreased number of red blood cells
• an increased level of oxygen
• an increased level of carbon dioxide

The tiny hollow air sacs where oxygen exchange takes place are the

• alveoli.

• lymph nodes.

• capillaries.

• bronchioles.