18 Questions
What is the first type of motor units recruited during muscle activation?
Smallest motor units
Which type of muscle contraction involves increasing tension without a change in muscle length?
Isometric
What is the role of muscle tone in the body?
To maintain stabilization, balance, and posture
During eccentric muscle contractions, the muscle is:
Lengthening
Which factor helps return a muscle to its resting length by performing opposite actions?
Opposing muscle contractions
What is the purpose of recruiting minimum motor units needed during muscle activation?
To avoid excessive tension in muscles
What is the term for the greatest tension produced at a muscle's 'optimal length'?
Peak tension
What factor affects the tension produced by a muscle?
Frequency of stimulation
Which type of contraction involves a 'staircase-like' increase in tension over the first 30-50 stimulations?
Treppe contraction
What does 'Tetanus' refer to in muscle contractions?
A type of contraction that produces maximum tension in a muscle
What is the term for the phenomenon where a second, immediate stimulation following relaxation leads to slightly higher maximum tension?
Treppe
How does sarcomere length affect active tension in muscles?
It determines the optimal overlap between actin and myosin filaments
What term is used to define ONE motor neuron and ALL of the muscle fibers that it controls?
Motor unit
Which type of tetanus involves continuous stimulation of a muscle fiber without allowing it to relax completely?
Complete tetanus
What does the size principle in motor unit recruitment state?
The smallest motor units are recruited first.
What mechanism is responsible for altering force production in muscles?
Motor unit recruitment
Which term describes the addition of one muscle twitch to another, resulting in a more powerful contraction?
Wave summation
How does summation tetanus differ from incomplete tetanus?
Incomplete tetanus involves continuous stimulation without relaxation.
Learn about the smooth and steady increase in muscle tension through the recruitment of motor units in an orderly fashion. Understand the concept of muscle tone and its importance for stabilization, balance, and posture.
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