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Chapter 10 and 11 final Exam review
Terms in this set (35)
The cell plasma membrane of a skeletal muscle fiber.
The area of the sarcolemma densely populated with receptors fir acetylcholine (Ach)
Release of Ach by somatic motor neuron
Binding ach to receptors at the motor end plate
Increases the permeability is the cell membrane for sodium.
sodium is responsible for what?
Raising the resting membrane potential or causing depolarization of the cell membrane.
Has three binding sites.
Troponin-I binds actin, Troponin-T binds tropomyosin, Troponin-c binds calcium.
Stored in the sarcoplasmic reticulum or it's expanded areas (terminal cisternae)
Covers the active sites on the action molecule.
Interaction of myosin with actin
Responsible for muscle contraction.
Creatine phosphate (Cr-p)
Acts as an energy reserve for skeletal muscle.
A fixed muscular contraction after death.
Increase protein synthesis and activates myosatellite cells leading to an increase in muscle growth and muscle mass
Location of smooth muscle
Found in the tunica media of blood vessels, especially arteries. Can be found on the respiratory, digestive and genitourinary tracts.
Cells are short and Y-Shaped, cells have a striated appearance. Mononucleated and involuntary.
circular muscles (sphincters)
Guard entrances and exits of internal passageways.
Primarily responsible for a given action or particular movement.
Muscle that assists a prime mover
stabilizes the origin of a prime mover
Applies to the tendon attachment that doesn't move.
Applies to the tendon attachment that moves.
Muscles of mastication
masseter, temporalis, pterygoid,
muscles of facial expression
insertion: mastoid process
The major abductor if the arm or shoulder.
Convergent muscle that allows Flexion, Adduction, and Internal rotation at the shoulder.
Compresses the abdomen and flexes the spine.
Extensor muscles of the knee or quadriceps
Rectus femoris, vastus, lateralis, vastus medialis, and vastus intermedus.
flexes hip, extends knee
action of iliopsoas
flexion at hip
Extension and lateral rotation at the hip.
Flexors if the knee and extension of hip
Innervated by sciatic nerve.
tibialis anterior and gastrocnemius
Needed for walking.
main action of tibialis anterior
Dorsiflexes ankle and inverts foot
main action of gastrocnemius
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