EXSC 530 Study Guide - Final Guide: Myocyte, Acetyl-Coa, Citric Acid Cycle

• School: USC, SC, Carolina, South Carolina
• Department: Exercise Science
• Course: EXSC 530
• Professor: Schumaker

Document Summary

Bioenergetics- the conversion of foodstuffs (fats, carbs, and protein) into energy. Endergonic reactions- reactions that require energy (atp, heat) to be added. Exergonic reactions- reactions that release energy (atp, heat) Discuss the role of enzymes how temperature and ph affect enzyme activity. Enzymes are catalysts that regulate the speed of reactions. They lower the energy of activation and interact with substrates through a lock and key model. Temperature: a small rise in body temp during exercise will increase enzyme activity; the continuation of a rise in body temp will denature enzymes ph: also slows enzymatic activity. High intensity exercise requires anaerobic metabolism, meaning it produces lactic acid and h+, so it drops ph. Discuss the primary fuel sources and how substrate availability affects utilization. During exercise, fats and carbs the primary fuel sources. The more of a substrate there is available, the more likely it is to be used. Carbs: primary substrate for proving atp to the muscles and brain.