Anatomy Chapter 7 Flashcards
(30 cards)
Which muscle can be found in the abdomen?
External oblique
What structure in cardiac muscle allows the muscle fibers to stimulate a wave of contraction?
Intercalated discs
What molecule allows cross-bridges between myosin and actin to break and re-form?
Adenosine triphosphate
When flexing the knee joint, what muscle group is relaxed?
Quadriceps femoris
What muscle crosses over the front of the thigh?
Sartorius
The muscle that is used to straighten a joint is called the _________.
extensor muscle
A patient was in traction after a severe injury. This required the patient to be on bedrest and immobile. What would you expect to happen to the patient’s muscles?
Atrophy
Where is the semitendinosus muscle found?
In the hamstrings
A patient’s blood vessels suddenly dilated. What effect would this have on the patient’s blood pressure?
The blood pressure would decrease.
What skeletal muscle is both voluntary and involuntary?
Diaphragm
What muscle action is associated with the gastrocnemius?
It plantar flexes the foot.
A bundle of muscle fibers is called a _________.
fascicle
What is the cause of rigor mortis?
Calcium remains in the muscle, causing muscle contraction.
Which muscle surrounds the eye?
Orbicularis oculi
The end of the muscle that is attached to the stationary bone is called the _________.
point of origin
Smooth muscle can be found in what location?
Blood vessels
Thick myofilaments are made up of _________.
myosin
What makes a muscle darker in color?
Richer blood supply
The muscle that causes a movement is called the _________.
primary mover
In muscle contraction, acetylcholine binds to specialized areas on the sarcolemma to allow which ion to enter the cell?
Sodium
A patient complains of pain in the shoulder muscle. The injured muscle is likely the _________.
deltoid
Which muscles can be categorized as voluntary muscles?
Skeletal
A patient visits the medical clinic because he has trouble walking due to lack of coordination of the muscles in the legs. The medical term for this is _________.
ataxia
A specialist who studies movement and can perform therapeutic movement for a patient is called a _________.
kinesiologist
