Ashford University - SOPHIA PATHWAY Sophia - Human Biology - Unit 2 Challenge 2 Question And Answers_Already Graded A.

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Sophia - Human Biology - Unit 2 Challenge 2 1 — Muscular System Identify the different types of muscles, how they operate, and the roles they play. Which of the following does the muscular system... do? • a.) Produce signal hormones • b.) Sense external stimuli • c.) Fight viral infection • d.) Produce body heat 2 — Skeletal Muscles Understand the basic makeup and behavior of skeletal muscles. What are long chains of myofilaments called? • a.) Myofilament chains • b.) Myofibrils • c.) Sarcomere • d.) Biceps 3 — Types of Skeletal Muscle and Muscle Contraction Overview Determine the two basic types of skeletal muscle. Which of the following statements is true? • a.) White skeletal muscles contract very slowly. • b.) White skeletal muscles have more myoglobin and capillaries than red skeletal muscles. • c.) White skeletal muscles have less blood supplied to them, therefore they can only contract for short amounts of time. • d.) White skeletal muscles allow for long, sustained activities. 4 — Muscle Contractions: Micro Level Determine how a muscle contracts. Which of these are the proteins that make up muscle fibers? • a.) Leptin and tubulin • b.) Actin and leptin • c.) Actin and myosin • d.) Myosin and tubulin 5 — Nervous System and Contractions Identify role of the nervous system in muscle contractions. Troponin and tropomyosin on actin filaments play a role in the binding of actin to __________. • a.) protein • b.) myosin • c.) neurotransmitters • d.) calcium 6 — Muscle System Disorders Identify several disorders and diseases of the muscular system. Which of these describes a strain? • a.) Muscle fiber tears or stretches too far • b.) Muscle tissue grows uncontrollably • c.) Muscle tissue shrinks • d.) Muscle tissue doesn't grow from exercise 7 — Muscle Building and Steroids Determine the effects that exercise and steroids has on your muscles. Which of the following statements about muscle building is associated strength training? • a.) Muscle tissues built from cross-country skiing will contain more oxygen-binding myoglobin. • b.) Training for a 10K race increases the number of mitochondria in muscle fibers. • c.) Jogging every morning will increase the number of blood capillaries. • d.) Lifting weights regularly increases muscle size. [Show More]

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