Question 1

Functions of muscle include

Accepted Answer

A)   the heartbeat.
B)   muscle tone.
C)   production of heat.
D)   moving body parts.
E)   All of the choices are correct.F) A) and E)
G) C) and D)

Question 2

Neurotransmitter molecules are stored in vesicles within

Accepted Answer

A)   myofibrils.
B)   motor units.
C)   motor end plates.
D)   motor neuron endings.
E)   sarcomeres.F) D) and E)
G) A) and D)

Question 3

Anaerobic muscle fatigue is most likely due to an accumulation of __________.

Accepted Answer

The answer of Anaerobic muscle fatigue is most likely due...

Question 4

Neurons communicate with muscle cells by releasing chemicals called ____________.

Accepted Answer

A)   neurotransmitters
B)   proteins
C)   myosin
D)   troponin
E)   tropomyosinF) All of the above
G) C) and D)

Question 5

This structure of a skeletal muscle cell extends from Z line to Z line.

Accepted Answer

A)   sarcolemma
B)   sarcomere
C)   sarcoplasmic reticulum
D)   A band
E)   I bandF) A) and D)
G) None of the above B

Question 6

Layers of dense connective tissue that separate and support individual muscles are called

Accepted Answer

A)   fascia.
B)   tendons.
C)   cartilage.
D)   lamina propria.E) A) and D)
F) None of the above

Question 7

Binding sites on the surface of actin allow the formation of cross bridges with molecules of

Accepted Answer

A)   ATP.
B)   myosin.
C)   troponin.
D)   tropomyosin.
E)   creatine.F) A) and E)
G) A) and D)

Question 8

The rectus femoris muscle

Accepted Answer

A)   is a member of the quadriceps femoris group.
B)   plantar flexes the foot.
C)   extends the thigh at the hip.
D)   adducts the thigh.E) B) and D)
F) A) and B)

Question 9

Neurons that control effectors are called sensory neurons.

Accepted Answer

A) True 
 B)False

Question 10

Multiunit smooth muscle

Accepted Answer

A)   is composed of sheets of muscle cells.
B)   tends to display rhythmicity.
C)   occurs in the walls of the stomach and intestines.
D)   responds to stimulation by neurons and certain hormones.
E)   None of the choices apply.F) C) and E)
G) B) and E)

Question 11

The minimal strength of stimulation needed to elicit a muscle contraction is called the threshold stimulus.

Accepted Answer

A) True 
 B)False

Question 12

A motor neuron and all the muscle cells it stimulates is called a

Accepted Answer

A)   neuromuscular bundle.
B)   fascicle.
C)   motor unit.
D)   myofibril.E) B) and D)
F) A) and C)

Question 13

When acetylcholine binds to its receptors in the muscle fiber membrane,the membrane becomes more permeable to

Accepted Answer

A)   potassium.
B)   sodium.
C)   calcium.
D)   acetylcholine.
E)   acetylcholinesterase.F) None of the above
G) A) and D)

Question 14

The functional connection between a neuron and a muscle cell is called a

Accepted Answer

A)   motor end plate.
B)   synaptic cleft.
C)   synaptic vesicle.
D)   junctional plate.
E)   neuromuscular junction.F) A) and E)
G) None of the above

Question 15

A broad sheet of dense connective tissue that connects muscle to muscle is called a(n)____________.

Accepted Answer

The answer of A broad sheet of dense connective tissue...

Question 16

A skeletal muscle cell is also called a skeletal muscle _____________.

Accepted Answer

A)   myofibril
B)   myofilament
C)   myosin
D)   fiberE) A) and C)
F) A) and B) D

Question 17

Cardiac muscle is located in the walls of blood vessels.

Accepted Answer

A) True 
 B)False

Question 18

A mass of dense connective tissue that connects a skeletal muscle to a bone is called a

Accepted Answer

A)   origin.
B)   insertion.
C)   tendon.
D)   ligament.
E)   epimysium.F) A) and B)
G) C) and E)

Question 19

An example of a partial but sustained contraction of a whole muscle is

Accepted Answer

A)   eye blinking.
B)   tetanic contraction of a muscle fiber.
C)   a twitch.
D)   muscle tone.
E)   fatigue of a motor unit.F) All of the above
G) B) and C)

Question 20

Muscle fatigue results from a combination of insufficient calcium and an excess of acetylcholine.

Accepted Answer

A) True 
 B)False  False

Exam 8: Muscular System

Functions of muscle include

Correct AnswerverifiedShow Answer

Neurotransmitter molecules are stored in vesicles within

Correct AnswerverifiedShow Answer

Anaerobic muscle fatigue is most likely due to an accumulation of __________.

Correct AnswerverifiedShow Answer

Neurons communicate with muscle cells by releasing chemicals called ____________.

Correct AnswerverifiedShow Answer

This structure of a skeletal muscle cell extends from Z line to Z line.

Correct AnswerverifiedB

Layers of dense connective tissue that separate and support individual muscles are called

Correct AnswerverifiedShow Answer

Binding sites on the surface of actin allow the formation of cross bridges with molecules of

Correct AnswerverifiedShow Answer

The rectus femoris muscle

Correct AnswerverifiedShow Answer

Neurons that control effectors are called sensory neurons.

Correct AnswerverifiedShow Answer

Multiunit smooth muscle

Correct AnswerverifiedShow Answer

The minimal strength of stimulation needed to elicit a muscle contraction is called the threshold stimulus.

Correct AnswerverifiedShow Answer

A motor neuron and all the muscle cells it stimulates is called a

Correct AnswerverifiedShow Answer

When acetylcholine binds to its receptors in the muscle fiber membrane,the membrane becomes more permeable to

Correct AnswerverifiedShow Answer

The functional connection between a neuron and a muscle cell is called a

Correct AnswerverifiedShow Answer

A broad sheet of dense connective tissue that connects muscle to muscle is called a(n)____________.

Correct AnswerverifiedShow Answer

A skeletal muscle cell is also called a skeletal muscle _____________.

Correct AnswerverifiedD

Cardiac muscle is located in the walls of blood vessels.

Correct AnswerverifiedShow Answer

A mass of dense connective tissue that connects a skeletal muscle to a bone is called a

Correct AnswerverifiedShow Answer

An example of a partial but sustained contraction of a whole muscle is

Correct AnswerverifiedShow Answer

Muscle fatigue results from a combination of insufficient calcium and an excess of acetylcholine.

Correct AnswerverifiedFalse

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B

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D

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False