67 4 the movement of the foot in which the sole is

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: sarcolemma into the muscle cell. Breakdown of ACh by AChase. Opening of the voltage-gated sodium channels. Opening of potassium channels. The troponin-tropomyosin complex shifts, exposing the active sites on actin. Uptake of ATP by the myosin heads. Attachment of actin-myosin crossbridges and swiveling of the myosin heads. 0% 0.66/0.66 13. An action potential is generated on the sarcolemma by which event of the following: Student Response A. B. C. D. E. F. Value Calcium ions enter the axon Calcium ions are pumped back into the sarcoplasmic reticulum. Acetylcholine is released into the synaptic cleft by exocytosis. Acetylcholine binds to post-synaptic receptors on the sarcolemma. Na+ moves across the sarcolemma out of the muscle cell. Opening of the chemically-gated sodium channels. G. Opening of the voltage-gated sodium channels. 0% 0% 0% 0% 0% 0% 100% H. I. J. K. 0% 0% 0% Opening of potassium channels. Binding of calcium ions to Troponin C. Uptake of ATP by the myosin heads. Attachment of actin-myosin crossbridges and swiveling of the myosin heads. 0% Score: 0.66/0.66 14. What event causes depolarization of the sarcolemma at the neuromuscular junction? Student Response Calcium ions enter the axon Calcium ions enter the sarcoplasm from the sarcoplasmic reticulum. Acetylcholine is released into the synaptic cleft by exocytosis. Acetylcholine binds to post-synaptic receptors on the sarcolemma. Na+ moves across the sarcolemma out of the muscle cell. F. Opening of the chemically-gated sodium channels. A. B. C. D. E. G. H. I. J. K. Score: Opening of the voltage-gated sodium channels. Opening of potassium channels. Binding of calcium ions to Troponin C. Uptake of ATP by the myosin heads. Attachment of actin-myosin crossbridges and swiveling of the myosin heads. Value 0% 0% 0% 0% 0% 100% 0% 0% 0% 0% 0% 0.66/0.66 15. Which of the following binds calcium ions: Student Response A. B. C. D. sarcoplasmic reticulum troponin C myosin all of the above E. 1 and 2, but not 3 Score: 100% 0.66/0.66 1. Muscle identification Match the muscle with its description. serratus anterior Value 50% 50% 0% 0% Instrumental in shrugging the shoulder. rhomboid major and minor The only muscle of the group which does not move the scapula. infraspinatus protracts the scapula, as in throwing a punch. levator scapulae Adducts and fixates the scapula. trapezius Retracts and fixates the scapula if the head is fixed. Statement serratus anterior rhomboid major and minor infraspinatus levator scapulae trapezius Score: Response protracts the scapula, as in throwing a punch. Adducts and fixates the scapula. The only muscle of the group which does not move the scapula. Instrumental in shrugging the shoulder. Retracts and fixates the scapula if the head is fixed. Value 20.0% 20.0% 20.0% 20.0% 20.0% 2/2 2. Match the muscles with their descriptions. sternocleidomastoid The upper portion of this muscle extends the head only if the scapula is fixed. splenius capitus Elevates the mandible to close the jaw. scalene...
View Full Document

This note was uploaded on 01/29/2013 for the course BIOL 239 taught by Professor Swan during the Fall '12 term at New Mexico.

Ask a homework question - tutors are online