BIO 232 Muscle Metabolism Worksheet PDF

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BIO 232 Muscle Metabolism Worksheet...

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The Muscular System: Muscle Metabolism 1.

List the three roles of ATP in muscle contraction: energizing the "power storke" of the myosin cross-bridge 1. ________________________________ disconnects the myosin head from the binding site on actin 2. ________________________________ energize the calcium ion pump 3. _________________________________

2.

The potential energy in ATP is released when the terminal high-energy bond is broken by a process called hydrolysis ___________________________. ADP, inorganic phosphate, and energy Write the end products of this process: ATP (+ H2O) → _________________

3.

Rebuilding ADP into ATP with a new source of energy is carried out by a process called dehydration synthesis ______________________________. ADP + P + energy → ATP (+ H2O) Write the equation for this process: __________________

4.

List the three processes used to synthesize additional ATP when ATP supplies are low: 1. _______________________________ Hydrolysis of creatine phosphate Glycolysis 2. _______________________________ Kreb's Cycle and oxidative phosphorlyation 3. _______________________________

5.

An immediate source of energy is _____________________ creatine phosphate (CP), but the supplies are limited and rapidly depleted. One molecule of CP produces ___ 1 ATP.

6.

Glucose is a major source of energy for synthesizing ATP. List the two sources of glucose: blood 1. ______________________________ hydrolysis of glycogen in the muscle cell 2. ______________________________

7.

_____________ Glycolysis is the process that breaks down glucose. Name two products of the breakdown of glucose: 2 ATP molecules 1. _________________ Pyruvic acid 2. _________________

lactic If oxygen is not available, pyruvic acid is converted to __________ acid, which is the end product of anaerobic _________________ respiration.

8.

If oxygen is available, the process is known as ______________ respiration. aerobic Name two sources of oxygen: 1. _______________________ blood 2. _______________________ myoglobin oxidative phosphorylation Krebs Cycle The aerobic pathway consists of glycolysis + ________________ + ___________________. The net

result of one glucose molecule is ___ 36 ATP. 9.

the oxygen debt The process of restoring the depleted energy reserves after exercise is called repaying _________________.

Name four processes that occur during this time: lactic acid is converted back to pyruvic acid 1. ______________________ ATP is used to rephosphorylate creatine into creatine phosphate 2. ______________________ glycogen is synthesized from glucose 3. ______________________ additional oxygen rebinds to myoglobin 4. ______________________

10.

Put the following characteristics under the correct fiber type: - Krebs cycle and oxidative phosphorylation

- uses glycolysis

- fatigue rapidly

- high endurance

- few capillaries

- many capillaries

- much myoglobin

- little myoglobin

- long-distance runner

- sprinter

- light in color—large diameter

- red in color—small diameter

Red Slow-Twitch Fibers Krebs Cycle and oxidative phosphorylation high endurance many capillaries

White Fast-Twitch Fibers

uses glycolysis fatigue rapidly few capillaries

much myoglobin long distance runner red in color- small diameter

little myoglobin sprinter light in color- large diameter...