Circulation & Respiration
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Questions and Answers

What is the main purpose of the breathing system?

  • To get oxygen needed for respiration and eliminate waste carbon dioxide (correct)
  • To release energy
  • To slow down the pulse
  • To pump blood around the body

Which process is also known as inhalation?

  • Getting rid of carbon dioxide
  • Pumping blood around the body
  • Breathing in air, including oxygen, into the lungs (correct)
  • Breathing out

Where does gas exchange take place in the respiratory system?

  • Bronchi
  • Trachea
  • Diaphragm
  • Alveoli (correct)

What happens to oxygen in the alveoli?

<p>It is transferred into the blood (A)</p> Signup and view all the answers

Why do muscle cells need oxygen and glucose slowly?

<p>To prevent sudden energy spikes (B)</p> Signup and view all the answers

How does the body control the pulse rate during exercise?

<p>By increasing the breathing rate (A)</p> Signup and view all the answers

What is the main function of the circulation system in the body?

<p>Carry dissolved food and oxygen to the body's cells (C)</p> Signup and view all the answers

Which part of the circulatory system is responsible for exchanging materials by diffusion between the blood and the interstitial fluid?

<p>Blood vessels (A)</p> Signup and view all the answers

What type of circulatory system do humans have?

<p>Closed circulatory system (B)</p> Signup and view all the answers

Which chamber of the heart receives oxygen-poor blood from the body?

<p>Right atrium (B)</p> Signup and view all the answers

What is the main function of the pulmonary circuit in circulation?

<p>Exchange gases in the lungs (C)</p> Signup and view all the answers

Which blood pathway starts from the right side of the heart, goes to the lungs, and returns to the left side of the heart?

<p>Pulmonary circuit (C)</p> Signup and view all the answers

What is the main function of the thin walls of alveoli in the lungs?

<p>To allow for quick gas exchange between lungs and blood (D)</p> Signup and view all the answers

What is the main difference in the composition of nitrogen between inhaled and exhaled air?

<p>Exhaled air has more nitrogen (B)</p> Signup and view all the answers

Which gas shows a significant decrease in percentage from inhaled to exhaled air?

<p>Oxygen (B)</p> Signup and view all the answers

What is the consequence of lactic acid build-up in muscle cells during anaerobic respiration?

<p>Causes fatigue and cramping (C)</p> Signup and view all the answers

Which type of respiration occurs when oxygen and glucose are readily available to cells?

<p>Aerobic respiration (B)</p> Signup and view all the answers

What happens when the body cannot supply cells with enough oxygen for glucose breakdown?

<p>Anaerobic respiration occurs (A)</p> Signup and view all the answers

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