Hemoglobin

question 233

Multiple Choice

Hemoglobin

• A)combines preferentially with O₂ over any other substance
• B)is known as carboxyhemoglobin when combined with carbon dioxide
• C)plays a critical role in determining the amount of O₂ exchanged between alveoli and blood
• D)has characteristics a and c
• E)has all of the above characteristics

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Definitions:

Trans Membrane

Pertaining to or occurring across a cell membrane, typically involving the movement of substances or the effect of signaling molecules.

Integral Membrane

Proteins that are permanently embedded within the cell membrane to facilitate communication and transport between the cell's interior and exterior.

Nuclear Envelope

The double membrane structure that encloses the nucleus of a eukaryotic cell, providing a barrier between the nucleus and the cytoplasm.

Endoplasmic Reticulum

A network of membranous tubules within the cytoplasm of a cell, involved in protein and lipid synthesis and transport.