'Multiple motor unit summation' presentation slideshows

More contraction!

More contraction! . Review Principles of Muscle Mechanics. Same principles apply to contraction of a single fiber and a whole muscle Contraction produces tension, the force exerted on the load or object to be moved. Review Principles of Muscle Mechanics.

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Muscles and Muscle Tissue

Muscles and Muscle Tissue. 9. Part B. Action Potential: Electrical Conditions of a Polarized Sarcolemma. The outside (extracellular) face is positive, while the inside face is negative This difference in charge is the resting membrane potential . Figure 9.8 (a).

581 views • 39 slides

Muscles and Muscle Tissue

Muscles and Muscle Tissue. 9. Part B. Depolarization. Like the plasma membranes of all cells, a resting sarcolema is polarized Initially, this is a local electrical event called end plate potential Later, it ignites an action potential that spreads in all directions across the sarcolemma.

601 views • 33 slides

Myofilaments: Banding Pattern

Myofilaments: Banding Pattern. Thick filaments are composed of the _ extend the entire length of an A band extend across the I band and partway into the A band Z-disc coin-shaped sheet of proteins ( connectins ) that anchors the thin filaments and connects myofibrils to one another.

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Muscle II. Mechanics Fiber Contraction.

Muscle II. Mechanics Fiber Contraction. Tension: Force exerted by a contracting muscle on an object. Load: Force exerted on the muscle by the weight of an object. Muscle shortens (and moves a load) when tension > load. Isometric contraction .

571 views • 29 slides

????? ???????? ( ? 67 ? )

????? ???????? ( ? 67 ? ). C 01. ? ?? cross bridge ???????? ?? ? ????????? actin ???? ?? ?? ??? (A ) ??? ( B ) ??? ( C ) ? ? ? ?? ? ATP ? ( D ) ? ???? cAMP ??? '04 ? ? ? C 02. ?? ????????????????? ? ( A ) ? ???? (B ) ?? ????? ? ( C ) ?

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Chapter 9

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M uscle Anatomical Organization and Physiology 10/28

M uscle Anatomical Organization and Physiology 10/28. Levels of muscle organization: organ to myofiber Levels of muscle structure: m yofiber to actin /myosin Sacromere bands: Why do they have different shades?

312 views • 21 slides

Muscles and Muscle Tissue: Part B

9. Muscles and Muscle Tissue: Part B. Motor Unit: The Nerve-Muscle Functional Unit. Motor unit = a motor neuron and all (four to several hundred) muscle fibers it supplies. Spinal cord. Axon terminals at neuromuscular junctions. Motor unit 1. Motor unit 2. Nerve. Motor neuron

367 views • 21 slides