When Oxygen Delivery Becomes Insufficient to Support a Runner's Aerobic

question 46

Multiple Choice

When oxygen delivery becomes insufficient to support a runner's aerobic metabolism,cells switch to an emergency mode in which ________.

• A)ATP is generated less efficiently by harvesting the heat energy in a cell
• B)ATP is inefficiently produced and lactic acid is generated as a by-product
• C)lactic acid is broken down to produce smaller amounts of ATP
• D)carbon dioxide is joined with water to generate much smaller amounts of ATP

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Definitions:

Compact Bone

The dense, hard outer layer of bones that provides strength, structure, and resistance to the body.

Bony Plates

Bony plates are rigid structures of dense bone forming the protective external layer or armor on certain animals, such as stegosaurs and armadillos.

Lacunae

Small spaces within bone or cartilage tissue that house cells such as osteocytes in bone or chondrocytes in cartilage.

Osteons

Osteons are the structural unit of compact bone, consisting of a central canal called a Haversian canal, surrounded by concentric rings of calcified matrix and containing the bone's blood supply.