Internal Respiration

Question 1

What causes hemoglobin to denature during internal respiration?

Answer 1

Difference in temperature and pH in the blood

Hemoglobin’s structural changes affect its ability to bind oxygen.

Question 2

What happens to oxygen during internal respiration?

Answer 2

Hemoglobin releases oxygen from oxyhemoglobin to tissue fluid

This process is crucial for supplying oxygen to tissues.

Question 3

What diffuses into the blood as a result of cellular respiration?

Answer 3

CO2 produced by cellular respiration

This CO2 is a byproduct of metabolic processes in cells.

Question 4

What forms when CO2 combines with deoxyhemoglobin?

Answer 4

Carbaminohemoglobin

This compound is important for CO2 transport in the blood.

Question 5

How is most CO2 transported in the blood?

Answer 5

As carbonic acid

Carbonic acid forms when CO2 combines with H2O.

Question 6

What separates carbonic acid into H and HCO3?

Answer 6

Carbonic anhydrase

This enzyme facilitates the rapid conversion of CO2 and H2O into carbonic acid.

Question 7

What happens to bicarbonate ions after they form?

Answer 7

They diffuse out of RBC and are carried in blood plasma

This process helps buffer the blood against drastic pH changes.

Question 8

What do excess H ions bond to for transport?

Answer 8

Hemoglobin

This bonding creates reduced hemoglobin, which also helps buffer blood.

Question 9

Name the three ways CO2 is transported in the blood.

Answer 9

• As carbonic acid
• As carbaminohemoglobin
• As dissolved CO2 gas

Each method plays a different role in CO2 transport and blood pH balance.