7.1 Blood Components

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Anatomy & Physiology
Unit 7 - Cardiovascular & Respiratory Systems
7.1 - I CAN describe the major components of blood and how it travels through the body.

Questions and Answers

1.

The component of blood shown here are the:
- A.
  
  Red blood cells
- B.
  
  White blood cells
- C.
  
  Plasma
- D.
  
  Platelets
Correct Answer
A. Red blood cells

Explanation
The component of blood shown in the image are the red blood cells.

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2.

The ______________ help form blood clots when you have injured a blood vessel.
- A.
  
  Platelets
- B.
  
  Plasma
- C.
  
  Red blood cells
- D.
  
  White blood cells
Correct Answer
A. Platelets

Explanation
Platelets are small, colorless cell fragments in the blood that play a crucial role in blood clotting. When a blood vessel is injured, platelets are activated and form a plug at the site of the injury to prevent excessive bleeding. They adhere to the damaged blood vessel wall and release chemicals that attract more platelets, forming a clot. This clot helps to seal the wound and initiate the healing process. Therefore, platelets are essential in the formation of blood clots when a blood vessel is injured.

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3.

Which component of blood helps fight against viruses and bacteria?
- A.
  
  Red blood cells
- B.
  
  White blood cells
- C.
  
  Plasma
- D.
  
  Platelets
Correct Answer
B. White blood cells

Explanation
White blood cells, also known as leukocytes, are the component of blood that helps fight against viruses and bacteria. They are part of the immune system and play a crucial role in defending the body against infections. White blood cells are able to recognize and destroy foreign invaders, such as viruses and bacteria, through various mechanisms including phagocytosis and the release of antibodies. They are essential for maintaining a healthy immune system and protecting the body from harmful pathogens.

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4.

What would most likely happen if your body was unable to produce red blood cells?
- A.
  
  Injuries might not heal properly
- B.
  
  You would have a vitamin deficiency
- C.
  
  You would have uncontrolled bleeding
- D.
  
  You would have low energy due to a lack of oxygen
Correct Answer
D. You would have low energy due to a lack of oxygen

Explanation
If the body is unable to produce red blood cells, it would result in low energy due to a lack of oxygen. Red blood cells are responsible for carrying oxygen to various tissues and organs in the body. Without an adequate supply of oxygen, the body's energy production would be compromised, leading to fatigue and a decrease in overall energy levels.

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5.

What would most likely happen if your body was unable to produce platelets?
- A.
  
  Injuries might not heal properly
- B.
  
  You would have a vitamin deficiency
- C.
  
  You would have uncontrolled bleeding
- D.
  
  You would have low energy due to a lack of oxygen
Correct Answer
A. Injuries might not heal properly

Explanation
If the body is unable to produce platelets, it would most likely result in injuries not healing properly. Platelets are responsible for blood clotting, which is crucial for wound healing. Without enough platelets, the blood would not be able to clot effectively, leading to prolonged bleeding and preventing the wound from healing properly. This could result in chronic wounds, increased risk of infection, and other complications related to the healing process.

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6.

Which type of blood vessel, shown here in red, carries blood AWAY from the heart?
- A.
  
  Artery
- B.
  
  Vein
- C.
  
  Capillary
Correct Answer
A. Artery

Explanation
Arteries are the blood vessels that carry oxygenated blood away from the heart to the rest of the body. They have thick, elastic walls that help to withstand the high pressure generated by the pumping action of the heart. This allows the arteries to efficiently transport blood to various organs and tissues. In contrast, veins carry deoxygenated blood back to the heart, while capillaries are the smallest blood vessels where the exchange of oxygen, nutrients, and waste products occurs between the blood and surrounding tissues.

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7.

Which statement is NOT true about veins?
- A.
  
  Veins are a type of blood vessel.
- B.
  
  Veins carry blood that has low levels of oxygen.
- C.
  
  Veins take blood away from the heart.
- D.
  
  Veins take blood back to the heart.
Correct Answer
C. Veins take blood away from the heart.

Explanation
The statement "Veins take blood away from the heart" is not true about veins. Veins actually take blood back to the heart. Veins are a type of blood vessel that carry blood that has low levels of oxygen and return it to the heart for oxygenation.

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8.

Which is the small network of blood vessels, shown in the middle?
- A.
  
  Veins
- B.
  
  Capillaries
- C.
  
  Arteries
Correct Answer
B. Capillaries

Explanation
Capillaries are the small network of blood vessels shown in the middle. They connect the arterioles and venules, allowing for the exchange of oxygen, nutrients, and waste products between the blood and surrounding tissues. Capillaries have thin walls, which facilitate this exchange through diffusion. They are found throughout the body and are responsible for delivering oxygen and nutrients to the cells while removing waste products.

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7.1 Blood Components

The component of blood shown here are the:

The ______________ help form blood clots when you have injured a blood vessel.

Which component of blood helps fight against viruses and bacteria?

What would most likely happen if your body was unable to produce red blood cells?

What would most likely happen if your body was unable to produce platelets?

Which type of blood vessel, shown here in red, carries blood AWAY from the heart?

Which statement is NOT true about veins?

Which is the small network of blood vessels, shown in the middle?