New Note

• Glucose

________ is broken down to CO2, first through glycolysis in the.

• Diffusion

________ is passive, driven only by the difference in O2.

• Alveoli

What are surrounded by an? Answer with a single words or term.

Animals

________ is obtaining sufficient oxygen and disposing of excess carbon.

CO2

________ is the byproduct of the breakdown of glucose.

• Inhaled air

________ passes through the.

• Lungs of mammals

What are packed? Answer with a single words or term.

• Hemoglobin

________ loads up with oxygen in the lungs, forming oxyhemoglobin.

• Neurons

What are sensitive to blood pressure of CO2 changes? Answer with a single words or term.

• Alveolar walls

________ break down and the lung exhibits larger but fewer.

walls of the alveoli

What are only one cell layer thick, and so are the? Answer with a single words or term.

• Oxygen

What is always bound to hemoglobin? Answer with a single words or term.

• Each heme group

________ has a central iron atom that can bind a molecule of O2.

• Each chain

________ is associated with a heme group.

• Contraction of the diaphragm

________ expands the volume of thorax and lungs.

• Contraction of the external intercostal muscles

________ expands the rib cage.