BREATHING & EXCHANGE OF GASES PART1 CLASS11

CO₂ is transported –

• By RBC

• As bicarbonates

• In a dissolved state through plasma

• All

Every 100 ml of oxygenated blood delivers following amount of O₂ to the tissues under normal physiological condition

• 5 ml

• 25 ml

• 50 ml

• More the 50 ml

A person has vital capacity of 5L and residual volume of 1.2 L. Total lung capacity –

• 6.2 L

• 4.8 L

• 500 ml

• None

Lungs are made up of air-filled sacs, the alveoli. They do not collapse even after forceful expiration, because of:

• Inspiratory Reserve Volume

• Tidal Volume

• Expiratory Reserve Volume

• Residual Volume

The trachea leads to the...

• Bronchioles
• Bronchi
• Esophagus
• Pulmonary Vessel

The air sacs that are covered with capillaries where gas exchange takes place is _________?

• Bronchi

• Trachea

• Oxygen

• Alveoli

Tags

NGSS.MS-LS1-3

What are the products of cellular respiration?

• Energy (ATP), Water, and Carbon DIoxide.
• Water and Oxygen
• Oxygen and Carbon Dioxide
• Water and Energy (ATP)

When air pressure inside the lungs is less than air pressure in the atmosphere...

• Air moves into the lungs
• Air moves out of the lungs

What are the main muscles of inhalation?

• The diaphragm and intercostal muscles

• The scalenes and the abdominal muscles

• The diaphram and abdominal muscles

• The diaphragm and latissimus muscles

A contraction of the diaphragm during inhalation causes it to flatten. What else does the contraction result in?

• An increase in the volume of the thoracic cavity

• Increase in alveolar pressure

• A decrease in lung volume

• A decrease in the volume of the thoracic cavity