Nsci 280 Week 4 Quiz

Week Four Quiz Chapter 9 fibrous System Histology and Physiology ________________________________________ 1. Which of the followers is NOT a function of skeletal sinew? a. body feces b. maintenance of posture c. respiration d. constriction of organs e. production of hotness 2. Which of the following is true? a. Skeletal vigor is capable of spontaneous contraction. b. polish up muscle is found in the walls of hollow organs. c. Cardiac muscle cells move over two-fold nuclei. d. Smooth muscle cells are long and cylindrical. e. There is a small amount of smooth muscle in the heart. 3.Which type of muscle tissue has cells that branch? a. skeletal muscle b. smooth muscle c. cardiac muscle d. both skeletal and cardiac muscle e. both cardiac and smooth muscle 4. Hypertrophy of skeletal muscles from weight lifting is caused by an augment in the a. pattern of muscle fibers. b. size of muscle fibers. c. number of striations. d. number of nuclei within the muscle fibers. e. number of m uscle cells. 5. Actin myofilaments a. resemble bundles of minute play clubs. b. contain both myosin and tropomyosin. c. are held in place by the M line. d. contain strands of fibrous actin. . are the thickest proteins in muscle. 6. When an action potential reaches the presynaptic terminal, a. calcium ions diffuse into the presynaptic terminal through voltage-gated ion channels. b. acetylcholine moves into the presynaptic terminal. c. a local potential is generated in the presynaptic terminal. d. ligand-gated ion channels in the presynaptic terminal are opened. e. nothing else happens. 7. In excitation-contraction coupling, a. calcium ions must bind with myosin to expose active sites on actin. b. myosin lintels bind to undefended active sites on actin. . cross-bridges form between myosin heads and calcium ions. d. movement of the troponin-tropomyosin multifactorial causes actin myofilaments to slide. e. ATP binds to actin myofilaments. 8. Which of the following helps explain the increase tension seen in multiple wave summation? a. increased motor unit recruitment b. increased concentration of calcium ions around the myofibrils c. exposure of more active sites on myosin myofilaments d. the breakdown of elastic elements in the cell e. decreased stimulus absolute frequency 9. An isotonic contraction is described as a. ction potential frequency is high school enough that no relaxation of muscle fibers occurs. b. a muscle produces ageless tension during contraction. c. a muscle produces an increasing tension during contraction. d. a muscle produces increasing tension as it shortens. e. a muscle produces tension, but the length of the muscle is increasing. 10. Which type of respiration occurs in the mitochondria? a. anaerophilous respiration b. aerobic respiration c. both anaerobic and aerobic respiration Chapter 10 Muscular System Gross Anatomy ________________________________________ 1.The sternocleidomastoid muscle extends from the mastoid surgical proced ure of the temporal bone to the sternum and medial clavicle. When both sternocleidomastoid muscles contract, the head is flexed. The end of the muscle that connects to the sternum is the a. origin. b. belly. c. body. d. insertion. e. fixator. 2. Which of the following demos a class I lever system? a. crossing your legs b. hyperextension of the head c. standing on your tiptoes d. crimp of the elbow to lift the hand e. lifting weight with your arm 3. In ensnare to stabilize the hyoid so that the larynx can be terrific in swallowing, the _____ muscle group is used. . Pterygoid b. Infrahyoid c. Auricularis d. Suprahyoid e. hyoglossus 4. If abdominal muscles are contracted musical composition the vertebral column is fixed this will aid in a. vomiting. b. childbirth. c. urination. d. defecation. e. any of these choices are correct. 5. Which muscle will depress the scapula or elevate the ribs? a. levator scapulae b. serratus anterior c. pectoralis minor d. subclavius e. rhomboideus major 6. Which of the following muscles extends the gird and has its insertion on the ulna? a. Deltoid b. biceps brachii c. triceps brachii d. brachialis e. coracobrachialis . The gluteus maximus a. does most of the execute in sit-ups. b. accounts for a sprinters stance. c. allows one to sit cross-legged. d. is used in the knee-jerk reflex. e. is a common site for injections. 8. Label muscle A on the diagram. a. orbicularis oculi b. musculus temporalis c. trapezius d. sternocleidomastoid e. masseter 9. Label muscle A on the diagram. a. linea alba b. serratus anterior c. rectus abdominis d. external oblique e. internal oblique 10. What does A represent? a. Coracobrachialis b. Deltoid c. pectoralis major d. biceps brachii e. serratus anterior