| (1) | The neurotransmitter released at the neuromuscular junction of skeletal muscles is |
| A. | epinephrine | |
| B. | acetylcholine | |
| C. | norepinephrine | |
| D. | serotonin | |
| E. | calcium |
| (2) | A single motor neuron and the group of muscle fibers that it innervates is called a |
| A. | transverse tubule | |
| B. | anisotropic band | |
| C. | motor unit | |
| D. | sarcomere | |
| E. | myofibril |
| (3) | Which of these types of muscles is NOT included in the axial skeleton? |
| A. | muscles that act on the knee | |
| B. | facial muscles | |
| C. | neck muscles | |
| D. | anterior and posterior trunk muscles | |
| E. | all of the above |
| (4) | What is the cell membrane of a muscle cell called? |
| A. | sarcoplasm | |
| B. | sarcoplasmic reticulum | |
| C. | myofibril | |
| D. | sarcolemma | |
| E. | endomysium |
| (5) | What is the distance from Z-line to Z-line called? |
| A. | A-band | |
| B. | H-zone | |
| C. | I-band | |
| D. | sarcolemma | |
| E. | sarcomere |
| (6) | What is the name of the compartment for calcium storage in a muscle fiber? |
| A. | sarcolemma | |
| B. | sarcomere | |
| C. | Golgi complex | |
| D. | sarcoplasmic reticulum | |
| E. | transverse tubule |
| (7) | What organelle in a non-muscle cell is the answer to #6 similiar to? |
| A. | lysosome | |
| B. | smooth endoplasmic reticulum | |
| C. | nucleus | |
| D. | mitochondria |
| (8) | Nerve impulses are carried to every myofibril in a muscle fiber via infoldings of the sarcolemma called |
| A. | endoplasmic reticulum | |
| B. | sarcoplasmic reticulum | |
| C. | transverse tubules | |
| D. | endomysium | |
| E. | fascia |
| (9) | Which are smaller, Myofilaments or Myofibrils? |
| A. | myofilaments | |
| B. | myofibrils | |
| C. | impossible to tell | |
| D. | they are the same size | |
| E. | it varies between contraction and relaxation |
| (10) | Tropomyosin is a long threadlike protein that wraps around ___________ fibers preventing the __________ from binding to it. |
| A. | F-actin/myosin | |
| B. | troponin/F-actin | |
| C. | myosin/F-actin | |
| D. | myosin/calcium | |
| E. | F-actin/troponin |
| (11) | The dense regular connective tissue that attaches a muscle to a bone is called a |
| A. | tendon | |
| B. | collagen fiber | |
| C. | ligament | |
| D. | fascial plane |
| (12) | A flattened sheetlike tendon (like the galea aponeurotica of the epicranius) is an example of an |
| A. | tendon | |
| B. | ligament | |
| C. | layer of fascia | |
| D. | aponeurosis |
| (13) | A thin but strong band of connective tissue covering a group of tendons often found in the wrist and ankle is called a |
| A. | synovial sheath | |
| B. | sarcolemma | |
| C. | ligament | |
| D. | transverse tubule |
| (14) | A bundle of 10-100 individual muscle fibers is surrounded by a connective tissue coat called the ___________ which produces a __________. |
| A. | endomysium/fascicle | |
| B. | perimysium/synovial sheath | |
| C. | epimysium/aponeurosis | |
| D. | perimysium/fascicle |
| (15) | Which of the following is NOT a basic property of all types of muscle? |
| A. | irritability (sensitivity to stimuli) | |
| B. | contractility (responds to stimuli by shortening) | |
| C. | lability (will begin to divid by mitosis if stimulated) | |
| D. | extensibility (may be stretched beyond their length) |