Name PeriodDate Test Chapter 6 Muscular System level. all-or-none\" property of
ID: 3482412 • Letter: N
Question
Name PeriodDate Test Chapter 6 Muscular System level. all-or-none" property of muscles is a phenomenon that occurs on the A) cellular B) tissue C) organ D) sarcomere is, 2. The primary function of all musc A) twisting B) lengthening C) or shortening D) to generate heat 3, which of the following muscle contraction is involuntary A) smooth muscle skeletal muscle 8) cardiac muscle D) A and B 4. Which of the following are characteristic of cardiac muscle? A) multinucleated cells B) spindle-shaped cells C) figure-8 arangement D) body skeleton attachment 5. Which of the following is NOT a function of muscle? A) generates heat C) produce movement B) transports 02 in the blood to the tissues D) maintain posture, stabilizes joints 6. Which is NOT true of an action potential? A) An action potential is a wave of electrical current B) An action potential is an all or nothing phenomenon C) The result of the action potential is the contraction of the muscle cell D) An action potential can stop or change direction along its pathway 7. Which of the follwing is the only muscle type thatis non-striated and involuntary? A) cardiac B) smooth C) skeletal D) muscle fiber 8. Which of the following refers to one neuron and all the skeletal muscle cells it stimulated A) neuromuscular junction B) synaptic cleft C) irritability and contractility D) motor unit 9. What is the anatomical name for a muscle cell? A) myofilament B) sarcolemma C) myofibrilD) muscle fiber 10. Which of the following structures performs the "power stroke" of muscle contraction? A) Myosin B) Actin C) neither D) both 11. One contractile unit of muscle is called a/n) A) muscle fiber C) sarcomere 8) muscle tissue D) there is no single unit 12. Which muscle is mainly responsible for the inspiration of air into the lungs A) Pectoralls major C) Respiri brachialis B) Latimus dorsi D) DiaphragmExplanation / Answer
1.a.cellular
Contraction happens only when atp is available at myosin head + actin attached together.
2. C.contraction or shortening
3.d. smooth muscles and cardiac muscles.
4.a
5.b
6.d.
7.b
8.a
9.d
10.a
11.c
12.d
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