43) What is the significance of the change in permeability of the sarcolemma in muscle contraction?A) It has no role, because this phenomenon does not occur.B) It causes the release of calcium ions.C) This change is caused by a neurotransmitter.D) This change is caused by the displacement of actin and myosin molecules.E) None of the answers are correct.Answer: BSection Title: Muscle ContractionLearning Outcome: 9.6Bloom's Taxonomy: Comprehension
44) Which of the following events occurs first?45) Most of the time whole muscles do notcontract at full strength because46) What type of muscular activity is present in a muscle at rest?47) When one motor neuron fires a single action potential the result affects oneA) upper motor neuron.B) synaptic cleft.C) lower motor neuron.D) motor unit.E) sensory unit.Answer: DSection Title: Motor Units and Muscle ControlLearning Outcome: 9.8Bloom's Taxonomy: Knowledge
48) All the muscle fibers controlled by a single motor neuron constitute a49) The number of cells per motor unit in the leg muscles is most likely
You've reached the end of your free preview.
Want to read all 40 pages?
- Fall '08
- Section Title, Anatomy of Skeletal Muscle