What is the primary role of haemoglobin in oxygen transport during exercise?

Understanding the Respiratory System

Quiz
•
Physical Ed
•
12th Grade
•
Medium
Phil Gray
Used 2+ times
FREE Resource
28 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
To dissolve oxygen in the blood plasma
To bind oxygen and transport it to tissues
To convert oxygen into carbon dioxide
To store oxygen in the muscles
Answer explanation
The primary role of haemoglobin is to bind oxygen in the lungs and transport it to tissues throughout the body, especially during exercise when oxygen demand increases.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does the oxygen dissociation curve shift during intense exercise?
To the left
To the right
It remains unchanged
It becomes a straight line
Answer explanation
During intense exercise, the body produces more carbon dioxide and lactic acid, which lowers pH and increases temperature. This causes the oxygen dissociation curve to shift to the right, enhancing oxygen release to tissues.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the effect of high altitude on respiration?
Decreased breathing rate
Increased oxygen availability
Increased breathing rate
Decreased carbon dioxide levels
Answer explanation
At high altitudes, oxygen levels decrease, prompting the body to increase the breathing rate to enhance oxygen intake. This compensatory mechanism helps maintain adequate oxygen supply despite lower atmospheric pressure.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which muscle is primarily responsible for inspiration during normal breathing?
Intercostal muscles
Abdominal muscles
Diaphragm
Pectoral muscles
Answer explanation
The diaphragm is the primary muscle responsible for inspiration during normal breathing. It contracts and moves downward, increasing the thoracic cavity volume and allowing air to flow into the lungs.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens to the ventilation rate during exercise?
It decreases
It remains constant
It increases
It stops
Answer explanation
During exercise, the body's demand for oxygen increases, leading to an increase in ventilation rate to supply more oxygen and remove carbon dioxide. Therefore, the correct answer is that the ventilation rate increases.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Where does gaseous exchange occur in the lungs?
Bronchi
Alveoli
Trachea
Larynx
Answer explanation
Gaseous exchange occurs in the alveoli, which are tiny air sacs in the lungs. They provide a large surface area for oxygen and carbon dioxide to diffuse between the air and the blood, making them essential for respiration.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a key cardiorespiratory adaptation to regular exercise?
Decreased lung capacity
Increased resting heart rate
Increased stroke volume
Decreased blood volume
Answer explanation
Increased stroke volume is a key adaptation to regular exercise, as it enhances the heart's efficiency by pumping more blood per beat, improving oxygen delivery to muscles. This contrasts with the incorrect options.
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