Author: Anonymous

Muscle tone is ________. A) the ability of a muscle to efficiently cause skeletal movementsB) the feeling of well-being following exerciseC) a state of sustained partial contractionD) the condition of athletes after intensive training  

A muscle that opposes, or reverses, a particular movement is a(n) ________. A) antagonistB) fixatorC) synergistD) agonist   

The 100 meter dash is a quick and short run requiring explosive speed. On completion of the dash the runners will continue to breathe hard for several seconds to minutes even though they are no longer running. Which of the following is the best explanation for why this is so? A) The runners’ use of stored oxygen, glucose and creatine phosphate is being replenished and this requires a   prolonged increase of oxygen intake. B) Since the exercise was mostly aerobic exercise, the runners’ bodies have not yet realized the run is over.C) The runners’ fast oxidative muscles are so slow to utilize oxygen it only begins aerobic respiration by the time the run has finished.D) Slow oxidative fibers are recruited last and have only started to work at completion of the run.  

What is calcium’s function during muscle contraction? a. Calcium binds to troponin, changing its shape and removing the blocking action of tropomyosin.b. Calcium binds to troponin to prevent myosin from attaching to actin.c. Calcium depolarizes the muscle fiber.d. Calcium flows down the T tubules to stimulate the influx of sodium from the sarcoplasmic reticulum.  

Muscle tone is ________. A) the ability of a muscle to efficiently cause skeletal movementsB) the feeling of well-being following exerciseC) a state of sustained partial contractionD) the condition of athletes after intensive training  

What is the major factor controlling how levers work? A) the structural characteristics of the muscles of the person using the leverB) the weight of the loadC) the direction the load is being movedD) the difference in the positioning of the effort, load, and fulcrum  

A muscle that opposes, or reverses, a particular movement is a(n) ________. A) antagonistB) fixatorC) synergistD) agonist   

What structure in skeletal muscle cells functions in calcium storage? A) sarcoplasmic reticulumB) mitochondriaC) Intermediate filament networkD) myofibrillar network  

Which muscle inserts onto the olecranon process? a. Biceps brachiib. Triceps brachiic. Latissimus dorsid. Pectoralis major

During vigorous exercise, there may be insufficient oxygen available to completely break down pyruvic acid for energy. As a result, the pyruvic acid is converted to ________. A) a strong baseB) stearic acidC) hydrochloric acidD) lactic acid