The names of muscles often indicate the action of the muscle. What does the term levator mean? A) The muscle flexes and rotates a region.B) The muscle is a fixator and stabilizes a bone or joint.C) The muscle elevates.D) The muscle functions as a synergist.  

In general, a muscle that crosses on the anterior side of a joint produces ________. A) extensionB) abductionC) flexionD) adduction  

The _______ muscles include the supraspinatus, infraspinatus, teres minor, and subscapularis. a. shoulder bladeb. rotator cuffc. humerusd. arm extender  

What is the functional unit of a skeletal muscle called? A) a sarcomereB) a myofilamentC) a myofibrilD) the sarcoplasmic reticulum  

What is the functional role of the T tubules? A) stabilize the G and F actinB) enhance cellular communication during muscle contractionC) hold cross bridges in place in a resting muscleD) synthesize ATP to provide energy for muscle contraction  

At the neuromuscular junction, the muscle contraction initiation event is __________. a. a release of calcium ions from the sarcoplasmic reticulumb. conduction of an electrical impulse down the T tubulesc. binding of acetylcholine to membrane receptors on the sarcolemmad. sliding of actin and myosin filaments past each other  

Which of the following is not a fatigue-producing factor in moderate exercise? a. Potassium imbalancesb. Lack of ATPc. Inorganic phosphate accumulationd. Damage to the SR  

What is the molarity of a NaOH solution if {v} mL are needed to titrate a {m} g sample of potassium hydrogen phthalate (KHP)? The molar mass of KHP is 204.2 g/mol and 1 mole of KHP reacts with 1 mole of NaOH. Report your answer to 3 significant figures.

The freezing point of helium is approximately –270°C. The freezing point of xenon is –112°C. Both of these are in the noble gas family. Which of the following statements is supported by these data?

Bismarck’s system of alliances began to unravel