Histology
This type of muscle tissue is unstriated
What is smooth muscle?
The muscle produces tension without changing the angle of the skeletal joint with this type of contraction
What is an isometric contraction?
This diamond shaped muscle is a superficial posterior back muscle, responsible for extension of the head, as well as elevation and retraction of the scapula
What is the trapezius?
These muscles work to flex the wrist as well as digits 2 - 5
What are flexor digitorum superficialis and flexor digitorum profundus?
Rectus femoris and vastus intermedius
What are synergists?
The name of the plasma membrane of a skeletal muscle cell
What is the sarcolemma?
Muscle tension stays constant and the load is moved as the length of the muscle changes with this type of contraction
What is an isotonic contraction?
Clinically significant muscle that laterally rotates the femur; spasms of this muscle may mimic sciatica
What is the piriformis?
These muscles extend the wrist and abduct it
What are extensor carpi radialis longus and extensor carpi radialis brevis?
Gastrocnemius and soleus
What are synergists?
A triad is comprised of the terminal cisternae of the sarcoplasmic reticulum and this structure
What is the transverse (t) tubule?
Holding a book in front of your body is an example of this type of contraction
What is an isometric contraction?
Major muscle of respiration
What is the diaphragm?
These muscle of the lateral compartment of the leg work in plantarflexion and eversion of the foot
What are fibularis longus and fibularis brevis?
Rectus abdominus and the erectors spinae group
What are antagonists?
This enzyme degrades the neurotransmitter released at the synaptic cleft
What is acetylcholinesterase?
The muscle shortens to move the load in this type of contraction
What is a concentric isotonic contraction?
Group of three muscles located in the posterior thigh, responsible for extending the hip and flexing the knee
What are the hamstrings?
These two members of the hamstrings extend the hip, flex the knee, and medially rotate the flexed knee
What are semitendinosus and semimembranosus?
Sternocleidomastoid and splenius capitis
What are antagonists?
This ion prompts the release of neurotransmitter at the synaptic cleft and binds to troponin
What is calcium?
Muscle tension diminishes and the muscle lengthens in this type of contraction
What is an eccentric isotonic contracton?
This muscle unlocks the fully extended knee, initiating knee flexion and internally rotates the knee
What is popliteus?
While all of the gluteal muscles abduct the femur, this gluteal muscle also is responsible for lateral (external rotation) and extension of the thigh
What is gluteus maximus?
Tibialis anterior and tibialis posterior
What are synergists and antagonists?