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1. A motor unit is a functional unit formed by a neuron and all the muscle fibres it innervates. II. When a muscle contracts, all motor units within that muscle must contract. III. When lifting heavy object, only larger units will be recruited as they produce larger force than the smaller ones. IV. Muscle tension increases as the number of motor units recruited increases.

1. A motor unit is a functional unit formed by a neuron and all the muscle fibres it innervates. II. When a muscle contracts, all motor units within that muscle must contract. III. When lifting heavy object, only larger units will be recruited as they produce larger force than the smaller ones. IV. Muscle tension increases as the number of motor units recruited increases.

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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OC Concentric contraction only 22) Which of the following statements is/are correct? * A motor unit is a functional unit formed by a neuron and all the muscle fibres it innervates. When a muscle contracts, all motor units within that muscle must contract. When lifting heavy object, only larger units will be recruited as they produce larger force than the smaller ones. IV. Muscle tension increases as the number of motor units recruited increases. I and IV II, III and IV I only II and III 23) An athlete has a lactate response shown in the picture below. What change (represented by red line) is expected after = F
Transcribed Image Text:OC Concentric contraction only 22) Which of the following statements is/are correct? * A motor unit is a functional unit formed by a neuron and all the muscle fibres it innervates. When a muscle contracts, all motor units within that muscle must contract. When lifting heavy object, only larger units will be recruited as they produce larger force than the smaller ones. IV. Muscle tension increases as the number of motor units recruited increases. I and IV II, III and IV I only II and III 23) An athlete has a lactate response shown in the picture below. What change (represented by red line) is expected after = F
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