The Muscular System Flashcards
Another name for a muscle cell is:
Fiber
The contractile unit of the muscle is the:
Sarcomere
The purpose of T-tubules is:
To allow electrical impulses to enter the muscle for contraction
What are the steps in a muscle contraction?
Vesicles release ACH; ACH binds to motor end plate; action potential travels down sarcolemma into T-tubule; Ca++ released into sarcoplasm; Ca++ binds to troponin; active sites exposed; myosin pulls actin
What are characteristics of muscle tissue?
Contractibility, excitability or irritability, and extensibility
The type of muscle fiber responsible for quick and forceful contractions of short duration?
White
A spastic or hypertonic muscle has:
Excessive tone
A flaccid or hypotonic muscle has:
Deficient tone
We measure muscle contraction through:
Myography, palpation, and EKG
Which muscle fiber contains high amounts of myoglobin and where can this muscle fiber be found?
Slow fibers (red)/in the back, spine, neck
Muscle fatigue is caused by:
Lack of ATP, lack of O2, lack of glucose, and lactic acid
A tetanus (or tetanic) contraction is:
A smooth and sustained contraction
The strength of muscle contraction is influenced by:
Length ofthe muscle when contracting, a negative feedback loop, and fatigue in the muscle
Treppe involves:
A step-like increase in strength of contraction following series of twitch contractions
Types of muscle contraction that results in a lengthening muscle but no change in tension?
Eccentric
Type of muscle contraction that results in no change of length but increasing tension?
Isometric
A muscle has maximum strength in which position?
Mid-range
The muscle that contributes to the same movement as the prime mover is?
Agonist
A hyper-irritable spot of muscle that refers pain to other areas is referred to as?
Trigger point
T/F
The mix of muscle fibers in particular muscle can be changed with exercise.
True
T/F
Tendons attach muscle to bone.
True
T/F
Tendon sheaths contain synovial membrane to enable movement of the tendon.
True
T/F
Muscle cells have (mostly) the same structures as a typical cell, but the structures have different names.
True
T/F
Skeletal muscle is also known as involuntary muscle.
False
T/F
Muscle fibers are long and thread-like.
True
T/F
Muscle tissue is responsible for heat reduction in the body.
False
T/F
Clients with Duchenne Muscular Dystrophy live a different but full length life.
False
T/F
A muscle is made up of either all white, all red, or all intermediate fibers.
False
T/F
Endurance training results primarily in increased numbers of myofibrils.
False
Aerobic or Anaerobic
Uses O2
Aerobic
Aerobic or Anaerobic
Performed in absence of O2
Anaerobic
Aerobic or Anaerobic
Produces Lactic Acid
Anaerobic
Aerobic or Anaerobic
Results in oxygen debt
Anaerobic
Aerobic or Anaerobic
Produces maximum energy
Aerobic
Aerobic or Anaerobic
Can produce energy for longer timer
Aerobic
