Hemoglobin and Respiration Flashcards

Flashcards about Hemoglobin and Respiration

Hemoglobin

Important for gas transportation through the body within red blood cells.

Red blood cells

Made in the red bone marrow, live about 120 days, and are removed by the liver and spleen.

Type of protein hemoglobin is

Quaternary.

Heme groups

Each with a central iron atom that may carry oxygen.

Globin areas

May carry carbon dioxide and the acid hydrogen ion

Carbonic anhydrase

Catalyzes the reaction of water plus carbon dioxide to carbonic acid, which then changes into hydrogen ions and bicarbonate.

External respiration

The exchange of oxygen and carbon dioxide in air and lungs (alveoli to blood and blood to alveoli).

Internal respiration

From blood to cells (systemic capillaries and tissues).

External Respiration Temperature and pH

Approximately 37 degrees Celsius and a pH of 7.4.

Internal Respiration Temperature and pH

Temperature is usually 37 or slightly higher, and pH has a range of 7.35 to 7.38.

Oxygen Transport in Blood

About 98% is carried by the iron in the heme group of hemoglobin.

Oxyhemoglobin

Hemoglobin plus oxygen.

Aqueous oxygen

Dissolved in blood plasma.

60% of carbon dioxide

Combines with water to form carbonic acid, which breaks into hydrogen atoms and bicarbonate ions with carbonic anhydrase.

30% of carbon dioxide

Binds with hemoglobin to form carbaminohemoglobin.

10% of carbon dioxide

Dissolved into the blood plasma.

Functions of hemoglobin

Carry oxygen, carry carbon dioxide, and act as a buffer.

Carry oxygen

Hemoglobin plus oxygen gives us oxyhemoglobin.

Carry carbon dioxide

Carbon dioxide binds with the hemoglobin to form carbaminohemoglobin.

Act as a buffer

Hydrogen ions attach to globin to form reduced hemoglobin.