The strength of a muscle contraction will increase as the strength of the stimulation is increased. This increase in contraction strength is due to ______ as the stimulus becomes stronger.
Additional motor units being recruited
How can ATP be regenerated within muscle cells?
Direct phosphorylation of ADP by creating phosphate
Glycolysis
aerobic respiration
A ______ is the simplest of skeletal muscle actions. It results from only one stimulus.
muscle twitch
______ is responsible for peristalsis
smooth muscle
Forcing a muscle to work hard promotes increased muscle strength and endurance. This principal is called the _____.
the overload principle
The _____ is the dense regular connective tissue that surrounds a group of muscle fibers (a fasicle).
Perimysium
The type of muscle that is found within the walls of dermal capillaries in the skin is ______.
smooth muscle
Each of the following is a structural characteristic of smooth muscle except _______.
Smooth muscle cells have striations
Which of the following has uninucleate cells?
Smooth muscle
Cardiac muscle
This type of skeletal muscle fiber has a fast speed of contraction, primarily uses aerobic pathways to generate ATP, and may become more common after repeated endurance (aerobic) exercise
Fast oxidative fibers
A motor unit consists of
A motor neuron
All muscle fibers that are connected to a particular motor neuron
The velocity and duration of muscular contraction is influenced by ______.
The muscle fiber type
The load being placed on the muscle
The number of muscle fibers being recruited
________ occurs when a skeletal muscle loses its ability to contract during strenuous exercise.
Muscle fatigue
The force of a muscle contraction can be affected by
Recruitment of motor units
Size of the muscle fibers
The frequency of stimulation
The length- tension relationship
This compound stores extra oxygen within muscle cells.
Myoglobin
A muscle will not react until the stimulation is of a certain strength, called the ______.
Threshold Stimulus
What are the 4 characteristics of muscles?
excitability
contractility
extensibility
elasticity
What are the 3 coverings of skeletal muscles?
perimysium
epimysium
endomysium
Each axon ending gives off several short, curling branches that collectively form ________ or end plate.
neuromuscular junction
What are the 3 phases of a muscle twitch?
Latent
Contraction
Relaxation
What occurs to a skeletal muscle when the rate of stimulation is increased?
unfused or fused tetanus during low frequency stimulation
muscle is always a little contracted?
muscle tone
muscle tone allows ________, stabilizes joints, and help to maintain posture.
muscles to be ready for activity
This is stored in muscles and is used as back up ATP.
creatine phosphate
The physiological inability to contract a muscle is called ________.