Explains the process of oxygen and carbon dioxide exchange in the alveoli and how oxygen is carried by the blood.
Oxygen dissociation from hemoglobin is influenced by factors such as pH, pCO₂ levels, and temperature, known as the Bohr effect.
Ref: NCERT Class 11 Biology Chapter 14: Breathing and Exchange of Gases Exchange of Gases and Transport of Oxygen
Surfactant is a lipoprotein that reduces surface tension in the alveoli, preventing their collapse during exhalation.
Ref: NCERT Class 11 Biology Chapter 14: Breathing and Exchange of Gases Exchange of Gases and Transport of Oxygen
The partial pressure of oxygen (pO₂) in the alveoli is approximately 104 mmHg, facilitating its diffusion into the blood.
Ref: NCERT Class 11 Biology Chapter 14: Breathing and Exchange of Gases Exchange of Gases and Transport of Oxygen
The conducting part of the respiratory system transports air, filters it, and humidifies it, but gas exchange occurs only in the alveoli.
Ref: NCERT Class 11 Biology Chapter 14: Breathing and Exchange of Gases Exchange of Gases and Transport of Oxygen
Oxygen binding to hemoglobin is reversible, allowing efficient oxygen loading in the lungs and unloading in tissues.
Ref: NCERT Class 11 Biology Chapter 14: Breathing and Exchange of Gases Exchange of Gases and Transport of Oxygen
The respiratory rhythm center in the medulla oblongata is responsible for maintaining and controlling the rate and rhythm of breathing.
Ref: NCERT Class 11 Biology Chapter 14: Breathing and Exchange of Gases Exchange of Gases and Transport of Oxygen
Nitrogen does not influence hemoglobin’s affinity for oxygen, unlike pO₂, pH, and temperature.
Ref: NCERT Class 11 Biology Chapter 14: Breathing and Exchange of Gases Exchange of Gases and Transport of Oxygen
Hemoglobin in red blood cells (RBCs) binds oxygen for transport, carrying approximately 97% of total oxygen.
Ref: NCERT Class 11 Biology Chapter 14: Breathing and Exchange of Gases Exchange of Gases and Transport of Oxygen
Heart rate does not directly affect the rate of gas diffusion in the lungs. Factors such as partial pressure gradient, membrane thickness, and gas solubility play a key role.
Ref: NCERT Class 11 Biology Chapter 14: Breathing and Exchange of Gases Exchange of Gases and Transport of Oxygen
Oxygen binds reversibly with hemoglobin, allowing efficient transport and release in tissues as needed.
Ref: NCERT Class 11 Biology Chapter 14: Breathing and Exchange of Gases Exchange of Gases and Transport of Oxygen
The pneumotaxic center in the pons moderates the function of the respiratory rhythm center by adjusting the duration of inspiration.
Ref: NCERT Class 11 Biology Chapter 14: Breathing and Exchange of Gases Exchange of Gases and Transport of Oxygen
Gas exchange occurs passively through diffusion, driven by partial pressure gradients of oxygen and carbon dioxide.
Ref: NCERT Class 11 Biology Chapter 14: Breathing and Exchange of Gases Exchange of Gases and Transport of Oxygen
