Muscle Tissue Introduction * Motion * Results from alternating contraction (shortening) and relaxation of muscles * Skeletal system * Provides leverage and a supportive framework for this movement * Myology – study of muscles Muscle Tissue * Alternating contraction and relaxation of cells * Chemical energy changed into mechanical energy Types of Muscle Tissue * Skeletal muscle – primarily attached to bones * Striated and voluntary * Cardiac
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BioLab3 Bones and Muscles Summary Report Student Name: I. Skeletal system A. Long Bone Structure Define the following terms. Bone Organ of the skeletal system Cartilage Serves as a cushion Ligament Dense‚ regular connective tissue/bone to bone Tendons Dense‚ regular connective tissue/ bone to muscle Osteocytes Separated by an extracellular matrix hardened by deposits of calcium salts Diaphysis Long shaft of compact bone Compact bone Solid and dense
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A&P Exam #3 Ch 9&10 1) Know the four (4) functional characteristics of all muscle tissues -Excitability or Responsiveness- The ability to receive and respond to a stimulus that is any change in the environment whether inside or outside the body. In the case of muscle ‚the stimulus is usually a chemical for example - a neurotransmitter released by a nerve cell‚ or a local change in ph. The response is generation of of an electrical impulse that passes along the sarcolemma of the
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tendons that then move bones 2.Maintain posture and body position 3.Support soft tissues •With the muscles of the abdominal wall and the pelvic floor 4.Guard entrances and exits •In the form of sphincters 5.Maintain body temperature •When contraction occurs‚ energy is used and converted to heat Skeletal muscles are organs Made of: •Connective tissue •Blood vessels •Nerves •Skeletal muscle tissue 2. List and describe the three layers of connective tissue associated with muscles.
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activities of daily living. PNF is a type of passive stretching that uses alternating contraction and relaxation movements to increase flexibility. The reason why PNF is better than other forms of flexibility training is that it helps the body’s muscular inhibition. For the elite performer‚ the most useful type of PNF is the CRAC (contract-relax‚ antagonist-contract) technique‚ which uses isometric muscle contractions as its basis. PNF stretching is best performed with a partner. Muscle recruitment is
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REVIEW SHEET EXERCISE 2 Skeletal Muscle Physiology NAME: LAB TIME/DATE: Electrical Stimulation 1. Name each phase of a typical muscle twitch‚ and‚ on the following line‚ describe what is happening in each phase. a. b. c. 2. In Activity 2‚ how long was the latent period? __________ msec Describe the chemical changes that are occurring during this period. The Graded Muscle Response to Increased Stimulus Intensity 3. From Activity 3‚ describe the effect of increasing
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should become experts on excitation-contraction coupling. 5. Group 5 should become experts on summation and tetanus. 6. Group 6 should become experts on smooth muscle contraction. 7. What are the three types of muscle found in the human body? Where can you find each‚ and what does each do? Cardiac – found in the heart Smooth – internal organs and tubes‚ stomach‚ urinary bladder Skeletal – attached to bones 8. What controls the contraction of the different types of muscle?
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\--’-S -::. ~ .\d.u Isometric contraction: Contraction occurring in which the muscle does not shorten but ..‚_internal tension increases. Isotonic contraction: The muscle changes in length and tension remains constant throughout the range of motion and the load. There are two types of isotonic contraction (concentric and eccentric). ti) Concentric contraction: When a muscle shortens through constant tension and range of motion moving a load. b) Eccentric contraction: The muscle lengthens with
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Chapter 38: Activity and Exercise! Test Bank! ! MULTIPLE CHOICE! ! 1.! The coordinated efforts of the musculoskeletal and nervous system maintain balance‚ posture‚ and body alignment. Body alignment refers to! ! a.! A low center of gravity balanced over a wide base of support.! b.! The result of weight‚ center of gravity‚ and balance.! c.! The relationship of one body part to another.! d.! The force that occurs in a direction to oppose movement.! ! !! ANS: C
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acetylcholine in a skeletal muscle contraction? Skeletal muscle fiber-Skeletal muscle fibers are the individual cells that are bound together in fascicles. Many fascicles are bound together to make a muscle Motor unit-A motor unit consists of a motor neuron and all of the muscle fibers in innervates. Skeletal muscle twitch-A skeletal muscle twitch is a mechanical response to a single action potential. Electrical stimulus- used to mimic the contractions of skeletal muscles Latent period-Latent
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