In the past, it was believed that lactic acid accumulated in the muscles of tracking athletes as a result of intense exertion. For this reason, coaches would have athletes slowly jog to move more oxygen into the muscles so lactic acid would be oxidized and there would be less soreness the next day. Based on current research, what is the most likely consequence of lactate production in the athlete’s performance? What is more likely to be the cause of muscle soreness?

Which of the following is the correct summary of the anaerobic breakdown of glucose in the skeletal muscle?   Glucose + ADP + Pi ⟶ lactate + ATP   Glucose + 2ADP + 2Pi ⟶ 2 lactate + 2ATP   Glucose + 2ADP + 2Pi + 2NAD+ ⟶ 2 pyruvate + 2ATP + 2NADH + 2H+   Glucose + ADP + Pi ⟶ pyruvate + ATP   Glucose + 2ADP + 2Pi ⟶ 2 pyruvate + 2ATP

During vigorous effort in muscle cells, ATP stores are quickly depleted. However, creatine phosphate can donate a phosphate to regenerate ATP to sustain effort. In other words, creatine phosphate has a higher phosphoryl transfer potential than ATP? a. False b. True

How else could you represent these data? Glycogen Levels in Calf normal Muscle during Treadmill Reported Effort during Treadmill Running extreme Running 75% heavy 50% moderate 25% light 3 0 3 2 time (hours) 1 2 time (hours) On one graph, with the same x-axis and 2 y- axes On one graph, with effort level on the x-axis instead of the y On one graph, with muscle glycogen level on the x-axis instead of the y On one graph, with the same y-axis and 2 x- axes muscle glycogen level O effort level

Contraction of both skeletal and smooth muscle is triggered by an increase in cytosolic Ca2+. Compare the mechanisms by which each type of muscle converts a rise in Ca2+ concentration into contraction.

Resistance (weight) training is recommended as part of an exercise program to lose weight and maintain that weight loss.  Why?

The role of creatine phosphate in muscle cells is to: provide energy for muscles during extended physical activity (greater than 20 minutes) split glucose in two accept electrons "recharge" spent ATP in the first several seconds of a muscle contraction shuttle H atoms to the ETC

Why is it in the muscle’s best interest to export lactic acid into the blood during intense exercise?

A fatigued muscle lacks sufficient oxygen for the aerobic respiration to supply needed ATP. The accumulation of Select one: a. acetic acid occurs and contractions occur with less strength b. lactic acid (lactate) occurs and muscle cramps may set in c. pyruvate occurs and muscle cramps set in d. ethyl alcohol occurs and less frequent contractions occur

Mark the following statements as true or false. If a statement is false, correct it to make a true statement. a. Stored ATP and creatine phosphate are immediate energy sources for muscle fibers. b. Glycolytic catabolism occurs in the mitochondria and requires oxygen. c. Glycolytic catabolism provides enough ATP to fuel from several minutes to a few hours of activity. d. Oxidative catabolism may oxidize the products of glycolysis, fatty acids, and amino acids