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Muscle Tissue

Muscle is a primary tissue with a specialized function of contraction, originati

QuestionAnswer
What are the three main types of muscle tissue? Striated (skeletal and cardiac) and non-striated (smooth).
What are the characteristics of skeletal muscle? Quick, forceful, voluntary contractions.
What are the characteristics of cardiac muscle? Rhythmic, vigorous, involuntary contractions.
What are the characteristics of smooth muscle? Slow, involuntary contractions.
What is the function of the epimysium? Surrounds the entire muscle
What is the function of the perimysium? Surrounds bundles of muscle fibers (fascicles).
What is the function of the endomysium? Surrounds individual muscle fibers
What two main protein myofilaments make up the sarcomere? Actin and Myosin
What is the function of the sarcoplasmic reticulum? Regulates calcium ion flow to myofilaments.
What is the function of T-tubules? Transmit signals that initiate contraction
What are the three primary types of muscle tissue? Skeletal, cardiac, and smooth muscle
What are the main functions of muscle tissue? Movement, posture maintenance, and heat production.
What unique structures are found in cardiac muscle that facilitate synchronized contraction? Intercalated discs.
Where is smooth muscle found? Walls of hollow organs.
What is the regenerative capacity of skeletal muscle? Limited, relies on satellite cells for repair.
What is the regenerative capacity of cardiac muscle? Low, often replaced by non-contractile fibrous scar tissue.
What is the regenerative capacity of smooth muscle? Retains the ability to proliferate and regenerate
From which embryonic germ layer does muscle tissue originate? Mesoderm
What is the diameter range of skeletal muscle fibers? 10 to 100 µm.
What is the function of tendons? Connect muscle to bone.
What two components are contained within the intercalated discs of cardiac muscle? Adherent junctions and gap junctions.
What hormone do myoendocrine cells secrete, and what is its function? Atrial Natriuretic Peptide (ANP), regulates blood pressure.
Which nervous system innervates smooth muscle? Autonomic nervous system.
What is the function of satellite cells in skeletal muscle? Repair of muscle tissue
What is the function of the H zone? The region of the A band where only thick filaments are present
What is the function of T (transverse) tubules? Transmit signals that initiate contraction
What type of muscle tissue is found in the walls of blood vessels? Smooth Muscle
What is the sarcolemma? The cell membrane of muscle fibers.
What is a motor unit? A motor neuron and all the muscle fibers it innervates.
What are the dark bands in striated muscle called? A bands
What is the role of calcium ions in muscle contraction? Binds to troponin, initiating the sliding of filaments.
What is the neuromuscular junction? The site where a motor neuron communicates with a muscle fiber.
Created by: tunbridgeerin
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