Thin filament - Study guides, Class notes & Summaries

2024 NSCA CSCS Exam ( Version 5 ) New Full Exam Questions and Answers ( Included ) 100% Correct 1. sliding filament theory Answer: theory that actin filaments slide toward each otherduring muscle contraction, while the myosin filaments are still 2. Z line Answer: A dark thin protein band to which actin filaments are attached in a striated muscle fiber, marking the boundaries between adjacent sarcomeres. 3. T tubules Answer: Also called transverse tubules, these are deep invaginations...

ex phys final exam practice questions and answers 100% pass What is a neuromuscular junction? - Correct Answer ️️ -Junction between motor neuron and muscle fiber What is a motor unit? - Correct Answer ️️ -Motor neuron and all fibers it innervates What is a motor end plate? - Correct Answer ️️ -Pocket formed around motor neuron by sarcolemma What is a neuromuscular cleft? - Correct Answer ️️ -Short gap between neuron and muscle fiber What happens when acetylcholine is rel...

WVU Biology 102 Exam 5 Questions and Answers Already Passed What are the functional units of the nervous system? neurons Basic structure / function of the neuron - dendrites, cell body and axon. Dendrites- receive impulses from the synapses of other Axon- place along which the message is sent. Long rope like object. Myelin Sheath- cover around the Axon, increases the speed of the message sent. What happens during an "action potential"? Sodium (Na) start out and then rushes in- ...

GMS 6474 Exam Questions and Answers 100% Correct Lecture 2 Muscles can either be ____ or ____? - Answer- 1. Voluntary 2. Involuntary What is one question to ask when comparing voluntary to involuntary muscles? - Answer- How is the underlying tissue metabolized? Cardiac functional syncytial vs smooth muscle functional syncytial? - Answer- Cardiac - pacemaker cells cause contractions Smooth - vasodilation/vasoconstriction True/False: Smooth muscle has striations? - Answer- FALSE! what tw...

What are the three types of muscle tissue? - Skeletal, Cardiac, and Smooth What are characteristics of skeletal muscle? - Striated, voluntary, multinucleated, somatic nervous system control What are characteristics of smooth muscle? - Non-striated, involuntary, uninucleated, autonomic nervous control What are characteristics of cardiac muscle? - Striated, branching, uninucleated, involuntary, autonomic nervous control, intercalated discs (gap junctions) What is the thick filament? - Myosi...

Myosin correct answers Thick filament in sarcomere Actin correct answers Thin filaments in sarcomere Z line correct answers Connective tissue that binds actin and myosin in a sarcomere What is the first step in muscle movement? correct answers 1. In the ready state, the myosin crossbridge is tightly bound at a 45 degree angle to the actin filament What is the second step in muscle movement? correct answers 2. ATP binds to myosin, allowing it to release from the actin filament What...

APHY 201 - Advanced Human Physiology: Summer 2024 Exam 3 Completely and Accurately Solved muscle fiber - Answer>>With an elongated shape and the presence of multiple nuclei, a skeletal muscle cell is also referred to as a ____. myofibrils - Answer>>Muscle filaments are part of cylindrical bundles called _____ which extend from one end of the fiber to the other, linked to tendons. thick filaments - Answer>>_____ are composed almost entirely of the protein myosin. sar...

ex phys final exam practice questions and answers 100% pass What is a neuromuscular junction? - Correct Answer ️️ -Junction between motor neuron and muscle fiber What is a motor unit? - Correct Answer ️️ -Motor neuron and all fibers it innervates What is a motor end plate? - Correct Answer ️️ -Pocket formed around motor neuron by sarcolemma What is a neuromuscular cleft? - Correct Answer ️️ -Short gap between neuron and muscle fiber What happens when acetylcholine is rel...

Components of myofibrils myosin- thick filament, with head , rsponsible for splitting ATP providing energy for the power stroke to grab onto the actin actin- thin filament, double helix troponin in actinbinds with Ca2+ from SR, exposes binding site on myosin to form cross bridges Crircular muscle structure arranged in a concentric ring Convergent muscle structure broad origin leading to a fan shaped muscle, looks similar to a brush or duster Parallell or longitudinal muscle structu...

Skeletal muscle - an organ specialized for contraction, composed of striated muscle fibers (cells), supported by connective tissue, attached to bone by a tendon or aponeurosis, and stimulated by somatic motor neurons Sarcomere - any of the repeating structural units of striated muscle Sliding filament mechanism - the explanation of how thick and thin filaments slide relative to one another during striated muscle contract to decrease sarcomere length Insertion - the attachment of a muscle t...