Hemoglobin

Science / Biology / Hemoglobin: A red pigment in red blood cells that can bind with oxygen and is largely responsible for the bloods oxygen-carrying capacity. Hemoglobin is composed of four polypeptide chains, two alpha (a) and two beta (b) chains.

Abnormal Hemoglobin

Science / Biology / Abnormal Hemoglobin: Hemoglobin molecule with a different shape due to an altered amino acid sequence (ultimately caused by an altered DNA base sequence), such as in the inherited disease sickle-cell anemia. MORE

Blood Pigment

Science / Marine Biology / Blood Pigment: A molecule used by an organism to transport oxygen efficiently, usually in a circulatory system (e.g., hemoglobin) MORE

Bohr Effect

Science / Marine Biology / Bohr Effect: When blood ph decreases, the ability of hemoglobin to bind to oxygen decreases. An adaptation to release oxygen in the oxygen starved tissues in capillaries where respiratory carbon dioxide lowers blo MORE

Vein

Health / First Aid / Vein: A blood vessel that carries blood toward the heart: most veins carry low-oxygen blood MORE

Respiratory Pigment

Science / Marine Biology / Respiratory Pigment: A molecule, polymer, or other complex adapted to bind and transport oxygen efficiently, usually in a circulatory system (e.g., hemoglobin) MORE

Oxygen Dissociation Curve

Science / Marine Biology / Oxygen Dissociation Curve: A curve showing the percent saturation of a blood pigment, such as hemoglobin, as a function of oxygen concentration of the fluid MORE

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