0
What else can I help you with?
Name four factors that influence contractile force and two that influence velocity and duration of contraction?
The four factors that influence contractile force are the number of muscle fibers stimulated, the relative size of the fibers, the frequency of stimulation and the degree of muscle stretch. Factors that influence the velocity and duration of contraction are the muscle fiber type, load and recruitment.
What is a concentric contraction?
concentric contraction is atype of muscle contraction which the muscle shortens while genrating aforce The muscle shortens to produce movement. A muscle contraction in which shortening occurs.
What is a contraction in which the muscle shorten and work is done?
This is muscle flexion or isotonic contraction.
True or false When the contraction of a skeletal muscle is studied in the laboratory by applying an electrical charge to the muscle the contraction is called a muscle twitch.?
true
What is a twitch contraction?
A twitch contraction is a single, brief contraction of a muscle fiber in response to a stimulus. It is the smallest unit of muscle contraction and is not strong enough to produce movement of a limb.
Which muscle contraction does acetylcholine and norepinephrine affect?
Acetylcholine and norepinephrine both affect smooth muscle contraction. They stimulate contraction in some muscles and inhibits contraction in others.
What factors affect muscle tone?
By constant low-level asychronous stimulation producing minute contraction of random motor units.
What affect joint stability?
3 factors 1) type of bone 2) position and strength of ligaments 3) contraction of muscle
What factors influence velocity and duration of muscle contraction?
Load placed on the muscle
List the biomechanical factors that affect human strength?
Neural controlMuscle cross-sectional areaArrangement of muscle fibersMuscle lengthJoint angleMuscle contraction velocity
Factors that inhibit muscle contraction?
Muscle fatigue is the main factor that inhibits muscle contraction. Muscles need oxygen and energy to contract and muscle fatigue is the lack of oxygen in a muscle. The build up of lactic acid is a factor of muscle fatigue.
Name four factors that influence contractile force and two that influence velocity and duration of contraction?
The four factors that influence contractile force are the number of muscle fibers stimulated, the relative size of the fibers, the frequency of stimulation and the degree of muscle stretch. Factors that influence the velocity and duration of contraction are the muscle fiber type, load and recruitment.
Constant contraction of a muscle is?
constant contraction of a muscle is called the muscle tone
How would a drug that interferes with cross bridge formation affect muscle contraction?
A drug that interferes with cross-bridge formation would prevent the myosin heads from binding to actin filaments, impairing the sliding filament mechanism essential for muscle contraction. This would result in a decrease in muscle force generation and overall muscle contraction efficiency.
What are the major factors that promote the flow of venous blood?
Factors are, skeletal muscle contraction, breathing movements and vasoconstriction of veins.[venoconstriction].
The two neurotransmitters that affect smooth muscle cells are acetylcholine and?
norepinephrine. Acetylcholine mainly causes smooth muscle contraction, while norepinephrine can either cause contraction or relaxation depending on the type of receptor it binds to on the smooth muscle cell.
How does the frequency of stimulation affect the amount of force generated by the muscle?
Increasing the stimulus to an isolated muscle increases the strength of a contraction. A muscle begins to contract when the stimulus is given; however, if the muscle does not finish contracting before the next stimulus hits, then the force of the contraction will increase to finish the contraction. This is known as wave summation.
