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- 19. Contractions in _______ fibers are asynchronous while contractions in is _______ fibers are synchronous. a. smooth muscle; smooth muscle b. smooth muscle; skeletal muscle c. skeletal muscle; smooth muscle d. skeletal muscle; skeletal muscle e. none of the above19. Which of the following is true about cardiac muscle? A. It is voluntary and striated B. It is involuntary and striated C. It is voluntary and non-striated D. It is involuntary and non-striated 20. Where does the electrical impulse of the heart start? A) Sinoatrial node B. Atrioventricular node C. Purkinje fiber D. Left bundle branch 21. What is unique about veins? A. They contain a tunica media B. They contain a tunica external C. They contain a tunica interna D. They contain valves 22. Where does gas exchange occur within a vessel?3) Collagen is a very important structural protein in animals. Discuss the various parts of the body in which collagen is an important structural molecule and what its function is at each body location.
- 1. Calcium triggers the contraction of a muscle fiber. Where in the muscle fiber is this calcium stored? A. nucleus B. calcium vesicles C. sarcoplasmic reticulum D. Golgi apparatus E. mitochondria24. Which of the following is true concerning the role of Calcium in the contraction of muscle- cells? A. Smooth muscle cells contract in response to an extracellular inward-Calcium-current. B. Skeletal muscle cells contract in response to an extracellular inward-Calcium-current. C. Striated muscle cells contract in response to an extracellular inward-Calcium-current. D. No type of muscle cell requires an extracellular inward-Calcium current for normal C. contractile-function. D. Isotonic : Isometric"Time to scrub in," says Dr. Hodges. The appendectomy you are about to observe is your second surgical case in surgical technician school. The patient, David Sims, is an 18- year-old male who was healthy until two days ago when he began having severe abdominal pain, fever, and vomiting resulting in a diagnosis of appendicitis. David is in excellent health and has never had surgery before, so you anticipate the procedure to go smoothly. Your instructor asked the anesthesiologist, Dr. Hodges, if you can observe her today during the procedure. "All of the patient's vital signs and lab work are within normal limits so we are good to go," says Dr. Hodges as David is brought into the operating room. You help get David ready by applying the heart monitor, oxygen saturation monitor, and blood pressure cuff. After David has been sedated, Dr. Hodges places a special tube down his esophagus to measure his core body temperature and another in his trachea (an endotracheal tube) to help him breathe…
- Myoglobin .... a.is a protein involved in the direct phosphorylation of ADP b.breaks down glycogen c.produces the end plate potential d.stores oxygen in muscle cellsWhich of these conditions would you expect to find within the legmuscle fibers of a world-class marathon runner?a. myoglobin-poor c. primarily anaerobicb. contract very quickly d. numerous mitochondria1 . Which of these characteristics describe smooth muscle cells, but not skeletal or cardiac muscle? Group of answer choices a . cell contraction results in some type of movement within the body b. cells become excited as they respond to stimulus from the nervous system c. cells can extend passively when the contraction phase is complete d. cells are mitotic and can divide and undergo hyperplasia as needed If the sarcolemma of the muscle cell is polarized the muscle is likely in this state Group of answer choices a. resting b. refractory c . Kansas d. neutral e. depolarized Which of the following does not correctly describe a way that muscles can be attached to bones? Group of answer choices by a ligament direct fusion to periosteum by a tendon by an aponeurosis
- Skeletal muscle is composed of very hard workingcells. Which organelles do you expect to find in abundancein skeletal muscle cell?a. nucleib. striationsc. golgi bodiesd. mitochondriaWhich of the following is true? A) Tendons join bone to bone B E Tendons join muscle to bone and other structures Ligaments join bone to bone Ligaments join muscle to bone and other structures a. and b. b. and C. Questions Filter (12) Molvier OL23. Which of the following statements about the connective sheath of skeletal muscle is true? a. the endomysium wraps around every single muscle fiber b. the perimysium wraps around groups of muscle fibers c. the epimysium wraps around the whole muscle organ d. all of the above e. none of the above
