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Exam 9: The Muscular System

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Question 21

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Matching Match the description with the corresponding term.​ a.​sternocleidomastoid b.​pectoralis major c.​orbicularis oris d.​masseter e.​abductor pollicis f.​psoas g.​biceps femoris h.​quadriceps femoris i.​abductor pollicis j.soleus -​flexes the knee

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Question 22

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Muscles that bend a limb at a joint are called ____. ​

A) ​extensors
B) ​abductors
C) ​flexors
D) ​adductors

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Question 23

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Adductor, flexor, and extensor muscles are named according to their ____.​

The muscle we develop when we do sit-ups is the ____.​

Muscles maintain a constant state of partial contraction known as ____________________.

Rapid, uncontrolled contraction of individual cells in the heart is known as ____________________.​

All of the muscle cells or fibers innervated by one motor neuron is called a(n) ____________________.​

Matching Match the description with the corresponding term.​ a.​sternocleidomastoid b.​pectoralis major c.​orbicularis oris d.​masseter e.​abductor pollicis f.​psoas g.​biceps femoris h.​quadriceps femoris i.​abductor pollicis j.soleus -​closes lips

In performing any given movement, the muscles performing the actual movement are called the prime movers or agonists.​

As the nerve impulse of an axon reaches the neuromuscular junction, it triggers the release of a neurotransmitter called ____.​

Also known as Lou Gehrig's disease, ____ is a progressive, degenerative disease of the motor neurons.​

Matching Match the description with the corresponding term.​ a.​sternocleidomastoid b.​pectoralis major c.​orbicularis oris d.​masseter e.​abductor pollicis f.​psoas g.​biceps femoris h.​quadriceps femoris i.​abductor pollicis j.soleus -​flexes and adducts the arm

The electrically polarized cell membrane of a skeletal muscle cell is called the ____________________.​

A decrease in muscle bulk due to a lack of exercise is called ____.​

The dark bands of skeletal muscle are made of thick filaments (myosin).​

A form of rheumatism that does not affect the joints is called ____.​

The light bands are made of the thin filaments of the protein ____.​

The type of muscle found in the uterus, blood vessels, and urinary bladder is known as ____ muscle.​

The ____ muscle raises your eyebrows and wrinkles the skin of your forehead.​

The area between two adjacent Z lines is called a(n) ____________________.​