1. Which of the following is not a function of the muscular system? a. heat gene
ID: 3515837 • Letter: 1
Question
1. Which of the following is not a function of the muscular system? a. heat generation b. posture maintenance C, interpretation of sensory input d. movement 2. Which of the following muscle types is under conscious control? a. skeletal b. cardiac c. smooth d. b and c 3. Which of the following is not a component of thin filaments? a. actin b. myosin c. troponin d. tropomyosin 4. The contractile unit of a muscle fiber is the- a. sarcomere b. T tubules c. microtubule d. mitochondria 5. Based on the sliding filament theory, which of the following is apparent during muscle contraction? a. I bands get longer b. A bands get shorter c. Z discs move closer together d. H zone becomes more obvious. 6. The muscle contraction initiation event at the neuromuscular junction is a. binding of acetylcholine to ligand-gated ion channel receptors on the sarcolemma b. Nat influx causing depolarization at the T tubules c. a release of calcium ions from the terminal cisternae d. sliding of actin and myosin filaments past each other 7. During repolarization, the sarcolemma is most permeable to a. sodium ions b. potassium ions c. calcium ions d·chloride ions 8. The major function of the T tubules in muscle contraction is to a. make and store creatine phosphate b. synthesize actin and myosin myofilaments c. regulate intracellular calcium concentration d. conduct electrical impulses that simulate calcium release from the sarcoplasmic reticulum 9. What is the role of calcium ions in skeletal muscle contraction? a. form hydroxyapatite crystals b. reestablish glyoogen stores to recover from oxygen deficit c. increase levels of myoglobin for aerobic respiration d. bind to troponin to activate cross bridge formationExplanation / Answer
Q1. following is not a function of the muscular system:- C) interpretation of sensory input.
Q2. following muscle is under concious control:- Skeletal
Q3. The following is not a component of thin filaments:- b) myosin
Q4. The contractile unit of the muscle fibre is the :- a) Sarcomere
Q5. Based on the sliding filament theory, the following is apparent during muscle contraction:- c)The Z discs move closer together.
Q6. The muscle contraction initiation event is at the neuromuscular junction is :- a) binding of acetylcholine to membrane receptors on the sarcolemma
Q7. During repolarization, the sarcolemma is most permeable to:- b) potassium ions
Q8. The major function of the T tubules in muscle contraction is to:- d) conduct electrical impulses that simulate calcium release from the sarcoplasmic reticulum
Q9. The role of calcium ions in skeletal muscle contraction is:- d) bind to troponin to activate cross bridge formation
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