.Tetnus 28. Which of these describes muscle fibers stimulated so rapidly that it
ID: 3521225 • Letter: #
Question
.Tetnus 28. Which of these describes muscle fibers stimulated so rapidly that it does not have time to relax at all, and a maximum sustained contraction occurs. b. Summation c. Tetnus 29. Which of these describes the origin of bone? a. The end of the muscle attached to the more stationary part of the skeleton. b. The end attached to the skeletal part that moves. c. None of these 30.True or false: Isotonic - muscle tension remains constant as the muscle changes length. a. True b. False 31. True or false: Isometric -muscles are allowed to shorten, so tension is developed at constant muscle length. a. True b. False 32. True or false: Muscles comprise the largest tissue in the human body and make up about 40% of male body weight and 32% female body weight. a. true b. falseExplanation / Answer
28) Tetanic Contraction .
A muscle twitch is a single contraction in responce to a brief threshold stimulation.
Summation is a second contraction which develops a greater tension and is fused to the first contraction
A tetanic contraction which is also known as physiologic tetanic contraction, just in case one gets confused with the disease form, occurs when the motor nerve connected to a skeletal muscle emits signals for contraction at a high rate.
29) The end of muscle attached to more stationary part of the bone.
Because it is scientifically proven that no doubt muscles are attached to bones on both the sides by means of tendons. But the origin is the ffixed attachment , while the insertion moves with contraction.
30) TRUE.
Isotonic contractions maintain constant tension in the muscle as the muscle length changes. It can happen when maximal force of contraction exceeds the total load on the muscle.
31) TRUE.
An isometric contraction is a concentric contraction which causes a muscle to shorten , therby, generating force. But note that this generation of force does not effect the length of the muscle.
32) TRUE.
Skeletal muscles are the most abundant tissues of the human body, they consist of the thread - like cells - the longest can be upto 30cm long and 0.15mm thick , those are bound together into strands by collagen filaments.
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