External Respiration Flashcards
What diffuses into the pulmonary capillaries during external respiration?
Oxygen
Oxygen is essential for cellular metabolism and is transported via the bloodstream.
What gas diffuses into the alveoli to be exhaled out of the body?
Carbon Dioxide
CO2 is a waste product of cellular respiration.
What is the process by which carbaminohemoglobin separates into CO2 and hemoglobin?
HbCO2 → Hb + CO2
This reaction releases CO2 for exhalation.
How is CO2 formed from carbonic acid, and what happens to it?
CO2 diffuses out of the blood
This process helps in maintaining acid-base balance in the body.
What happens to reduced hemoglobin during external respiration?
HHb → H+ + Hb
This reaction releases hydrogen ions, affecting blood pH.
What effect do increased H ions have on the blood?
Lower pH, triggering inhalation
The decrease in pH stimulates respiratory centers in the brain.
What occurs in the alveoli regarding deoxyhemoglobin and oxygen?
Deoxyhemoglobin grabs hold of 4 oxygen molecules, forming oxyhemoglobin
This process is crucial for oxygen transport to tissues.
What is the chemical equation representing the formation of oxyhemoglobin?
Hb (deoxygenated) + O2 (oxygen) = HbO2 (oxyhemoglobin)
Oxyhemoglobin is essential for delivering oxygen to cells.
What would be considered external respiration?
O2 + Hb —> HbO2
What reaction represents external respiration?
H + HCO3 —> H2O + CO2
Alveolus, pulmonary capillary, tissue fluid, tissue capillary concentration of O2 so O2 may reach the tissues?
High, low, low, high
Function of cilia in trachea?
Move mucous towards the glottis
