Understanding Breathing and Exercise

What is the primary muscle involved in the mechanics of breathing?

• Trapezius

• Diaphragm

• Biceps

• Quadriceps

Which of the following processes is responsible for the removal of carbon dioxide from the body?

• Photosynthesis

• Respiration

• Digestion

• Excretion

What is the primary function of the alveoli in the respiratory system?

• To filter dust and particles

• To exchange gases between the air and blood

• To produce mucus

• To support the trachea

How does exercise affect the rate of breathing?

• It decreases the rate of breathing

• It has no effect on the rate of breathing

• It increases the rate of breathing

• It stops breathing temporarily

Which of the following is a consequence of increased carbon dioxide levels in the blood?

• Decreased heart rate

• Increased blood pH

• Increased breathing rate

• Decreased breathing rate

What role does the ribcage play in the mechanics of breathing?

• It compresses the lungs during inhalation

• It protects the lungs and assists in expanding them during inhalation

• It filters air entering the lungs

• It produces oxygen for the body

During exercise, which of the following changes occur in the respiratory system to meet increased oxygen demand?

• Decreased tidal volume

• Increased tidal volume

• Decreased lung capacity

• Decreased oxygen uptake

What is the effect of hyperventilation on carbon dioxide levels in the blood?

• Increases carbon dioxide levels

• Decreases carbon dioxide levels

• Has no effect on carbon dioxide levels

• Causes carbon dioxide levels to fluctuate

Which part of the brain regulates the rate of breathing?

• Cerebellum

• Medulla oblongata

• Hypothalamus

• Thalamus

What happens to the diaphragm during inhalation?

• It remains stationary

• It contracts and moves downward

• It contracts and moves upward

• It relaxes and moves upward