Midterm 2 review

Midterm 2 review - KINE 303 Physiology of Exercise Spring...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
KINE – 303 Physiology of Exercise Spring 2007 Exam II Review Chapters: 2, 3, 4, 5, 12, 13, 22 Please use this review as a resource to help you prepare for Exam II. This review is NOT all inclusive. Please review the chapters, lecture material, and labs as well. The exam will consist of multiple choice, true/ false, and short answer questions. Enzymes work by a “lock and key” mechanism. Phosphogen/glycogen – anaerobic metabolism Mitochondrial respiration – aerobic metabolism Phosphogen – stored ATP in muscle cells, can us it immediately. When phosphate bonds break, we get a lot of energy for muscle contraction. Muscle storage of ATP is very small, stored ATP gets depleted very quickly. Body will supercompensate for depleted stores of ATP. Creatine phosphate in muscle has the potential to transfer energy into the cell. CP concentration in muscle is 5x greater than ATP, and has a greater ability to donate phosphate than ATP. During heavy muscle effort, it allows for transfer of Pi to ADP during rapidly depleting ATP stores, but very unstable so not our main energy source. 0-10/15 sec – Phosphogen system 0-2min – Glycolysis 0-5min – Aerobic metabolism Phosphogen System – ATP/CP system occurs in the absence of oxygen because cardiovascular system doesn’t have time to react to high intensity, short duration activities. This all occurs in the sarcoplasm of the muscle cells. It is the predominant system for: maximal activities lasting less than 15 sec. Intense activities will deplete CP in less than 15 sec. ATP and CP have two separate energy sources: Myokinase and creatine kinase (governs the rate of the phosphogen system, CK reaction is reversible. ATP can be used to phosphorylate creatine and replenish the muscle CP stores. Identify the kcals of energy per gram of CHO, Fat, Protein. CHO – 4kcal/g Fat – 9kcal/g Protein – 4kcal/g What is the preferred source of energy for the body?
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
ATP is the energy of choice because it has high energy phosphate bonds and has the ability to donate free energy. Define glucoenogenisis and glycogenolysis. Role in energy production? Glycogenolysis – break down of stored glycogen into glucose. Rate is controlled by increased concentration of calcium and Pi in contracting muscles, activates phosphorylase which cleaves off a glucose molecule. Glucoenogenesis – (making new glucose) used to maintain carbohydrate supply. It occurs in the liver and recycles lactic acid. Converts lactic acid back to glucose which goes into the blood and can again be taken up by exercising muscles. What are the roles of CHO, Fats, Proteins in the body and in energy production?
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/29/2008 for the course KINE 303 taught by Professor Olmstead during the Spring '07 term at Cal Poly.

Page1 / 5

Midterm 2 review - KINE 303 Physiology of Exercise Spring...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online