7.1 Gaseous Exchange in Human

The ion found in the haem group is what

• Mg²⁺

• O^2-

• Fe²⁺

• Fe³⁺

What is the name of the molecule formed when oxygen binds to haemoglobin?

• oxyhaemoglobin

• oxygen-haemoglobin

• carbaminohaemlobin

• oxyglobin

Haemoglobin is present in ______________________cells.

• white blood cells

• red blood cells

• plasma

• platelets

Which of the following is NOT the structure of haemoglobin?

• Each haemoglobin molecule contains 4 haem group

• Haemoglobin is a quaternary structure

• Every each haem group in haemoglobin can bind with 4 molecule of oxygen

• Each haemoglobin has 2 α-chain and 2 β-chain polypeptide subunits

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

• bronchi
• lungs
• oxygen
• alveoli

Tags

NGSS.HS-LS2-3

NGSS.HS-LS2-5

Within the lungs, the exchange of oxygen and carbon dioxide occurs between the ___ and the capillaries. 

• trachea 
• bronchi 
• alveoli
• diaphragm

Which of the following are features of the alveoli that adapt them to gas exchange?

I. High surface area
II. Thin walls
III. Dry surfaces

• I and II only
• I only
• II and III
• I, II, and III

Which of the following reactions occur in erythrocytes in the pulmonary capillaries?

• Hb + CO₂ → HbCO₂

• H₂CO₃ → H+ + HCO₃ ^-

• Hb + O₂ → HbO₂

• HbO₂ → Hb + O₂

An oxygen dissociation curve will shift to the right in what condition describe below.

• Increased partial pressure of oxygen

• Decreased partial pressure of oxygen

• Increased partial pressure of carbon dioxide

• Decreased partial pressure of carbon dioxide

An increase in CO2 in human blood shifts the oxyhaemoglobin dissociation curve to the right.
What is the explanation for the effect?

• An increase in CO2 concentration increases the ventilation rate
• CO2 is more soluable than oxygen and displaces it
• Diffusion of CO2 between the alveoli and the blood is more rapid
• Increasing the H+ concentration descreases haemoglobin affinity for oxygen