Question 1

Which of the following inserts into a tendinous sheet,rather than a bone?

Accepted Answer

A)  extensor carpi ulnaris
B)  flexor carpi radialis
C)  extensor digitorum
D)  palmaris longus
E)  flexor digitorumF) C) and D)
G) B) and E)

Question 2

You are lying on the floor with your feet flat and your knees up practicing your abdominal crunches.You raise your upper body to the ceiling,up and down.What muscles are you using to the greatest extent?

Accepted Answer

A)  diaphragm
B)  rectus abdominus
C)  pectoralis major
D)  internal intercostals
E)  transverse abdominisF) C) and D)
G) B) and D)

Question 3

Structure I is composed of

Accepted Answer

A)  actin and perimysium.
B)  actin and myosin.
C)  troponin and tropomyosin.
D)  only myosin heads.
E)  acetylcholine and cholinesterase.F) A) and B)
G) B) and D)

Question 4

Which of the following describes the action of the trapezius?

Accepted Answer

A)  adducts the spine
B)  adducts and flexes the humerus
C)  elevates,adducts,depresses,or rotates the scapula
D)  provides medial rotation of the head
E)  provides lateral rotation of the humerusF) None of the above
G) A) and E)

Question 5

Neurotransmitters that cause skeletal muscle contraction are normally stored in

Accepted Answer

A)  myofibrils.
B)  motor neuron axon terminals.
C)  motor units.
D)  motor end plates.
E)  actin.F) A) and E)
G) A) and D)

Question 6

Which statement regarding "heat loss" is true?

Accepted Answer

A)  Muscle activity does not generate heat.
B)  Shivering in a cold environment results in higher levels of heat loss.
C)  When skeletal muscles are contracting at peak levels,body temperature drops.
D)  Heat loss is reduced when blood flow to the skin increases.
E)  Muscle contractions play an important role in the maintenance of normal body temperature.F) A) and B)
G) B) and D)

Question 7

"Anaerobic endurance"

Accepted Answer

A)  is used during long,slow athletic activities.
B)  is exemplified by contractions of fast muscle fibers.
C)  is determined by the availability of carbohydrates,lipids,or amino acids for breakdown.
D)  is the length of time a muscle can continue to contract while supported by mitochondrial activities.
E)  does not promote muscle hypertrophy.F) A) and E)
G) C) and E)

Question 8

Smooth muscle

Accepted Answer

A)  does not use calcium.
B)  is not resistant to fatigue.
C)  contracts faster than skeletal muscle.
D)  does not undergo tetanus.
E)  uses primarily aerobic metabolism.F) A) and E)
G) A) and D)

Question 9

Which of the following acts to flex the elbow?

Accepted Answer

A)  brachioradialis
B)  triceps brachii
C)  pronator quadratus
D)  palmaris longus
E)  supinatorF) B) and C)
G) D) and E)

Question 10

The deltoid acts to

Accepted Answer

A)  flex the wrist.
B)  medially rotate the shoulder.
C)  abduct the arm.
D)  adduct the arm.
E)  laterally rotate the shoulder.F) A) and E)
G) C) and E)

Question 11

Looking at the muscle name sternocleidomastoid,you would identify that this muscle is located in the area of the

Accepted Answer

A)  leg.
B)  neck.
C)  back.
D)  abdomen.
E)  arm.F) A) and B)
G) C) and D)

Question 12

The specialized sarcolemma that contains acetylcholine receptors is the

Accepted Answer

A)  synaptic knob.
B)  motor end plate.
C)  motor unit.
D)  synaptic cleft.
E)  I band.F) C) and D)
G) None of the above

Question 13

The skeletal muscles store calcium ions in the terminal cisternae of the

Accepted Answer

A)  sarcolemma.
B)  sarcomere.
C)  sarcosome.
D)  sarcoplasmic reticulum.
E)  sarcoplasm.F) B) and D)
G) A) and E)

Question 14

In infants,which muscle allows for the mouth to form a tight fit around the nipple during suckling at the breast?

Accepted Answer

A)  masseter
B)  buccinator
C)  orbicularis oris
D)  risorius
E)  levator labiiF) B) and D)
G) B) and E)

Question 15

Acetylcholinesterase is found within the

Accepted Answer

A)  nucleus.
B)  sarcolemma.
C)  myofibril.
D)  sarcomere.
E)  synaptic cleft.F) A) and B)
G) A) and C)

Question 16

Because Mary wants to enter a marathon,she decides to consult a trainer who happens to be a kinesiologist.The trainer advises her on what type of muscle fibers she needs to develop and how she should train for it.Which type of muscle fibers are involved? Briefly explain the anatomy and physiology of the trainer's advice.

Accepted Answer

As marathons require aerobic endurance,M...

Question 17

As a skeletal muscle contraction is initiated,acetylcholine binding alters the motor end plate membrane's permeability to

Accepted Answer

A)  acetylcholinesterase.
B)  sodium ions.
C)  calcium ions.
D)  chloride ions.
E)  potassium ions.F) A) and B)
G) C) and E)

Question 18

You have a large garden with a variety of fruits,vegetables,and flowers,and you have a problem with insects eating them.You decide to use Malathion,an organophosphate insecticide,but you are not terribly careful about protecting yourself as you are spraying.Worried,you decide to look up the action of Malathion and find that it is an acetylcholinesterase inhibitor.Explain how this chemical affects muscle contraction and include where it has its effect and why.

Accepted Answer

AChE is the enzyme that splits up acetyl...

Question 19

The muscle that originates along the entire length of the linea aspera of the femur is the

Accepted Answer

A)  sartorius.
B)  vastus medialis.
C)  iliacus.
D)  rectus femoris.
E)  biceps femoris.F) B) and E)
G) C) and E)

Question 20

Which of the following inserts into the intertubercular groove of the humerus and acts to extend,adduct,and rotate the shoulder?

Accepted Answer

A)  supraspinatus
B)  latissimus dorsi
C)  serratus anterior
D)  triceps brachii
E)  trapeziusF) A) and C)
G) B) and D)

Exam 7: The Muscular System

Correct Answer
verified
AChE is the enzyme that splits up acetyl...
View Answer

"Anaerobic endurance"

Correct Answer
verified

In infants,which muscle allows for the mouth to form a tight fit around the nipple during suckling at the breast?

Correct Answer
verified

The deltoid acts to

Correct Answer
verified

The specialized sarcolemma that contains acetylcholine receptors is the

Correct Answer
verified

As a skeletal muscle contraction is initiated,acetylcholine binding alters the motor end plate membrane's permeability to

Correct Answer
verified

Correct Answer
verified
As marathons require aerobic endurance,M...
View Answer

Which of the following acts to flex the elbow?

Correct Answer
verified

You are lying on the floor with your feet flat and your knees up practicing your abdominal crunches.You raise your upper body to the ceiling,up and down.What muscles are you using to the greatest extent?

Correct Answer
verified

The skeletal muscles store calcium ions in the terminal cisternae of the

Correct Answer
verified

Which of the following inserts into a tendinous sheet,rather than a bone?

Correct Answer
verified

Which statement regarding "heat loss" is true?

Correct Answer
verified

Acetylcholinesterase is found within the

Correct Answer
verified

Neurotransmitters that cause skeletal muscle contraction are normally stored in

Correct Answer
verified

Which of the following describes the action of the trapezius?

Correct Answer
verified

Smooth muscle

Correct Answer
verified

Structure I is composed of

Correct Answer
verified

Which of the following inserts into the intertubercular groove of the humerus and acts to extend,adduct,and rotate the shoulder?

Correct Answer
verified

Looking at the muscle name sternocleidomastoid,you would identify that this muscle is located in the area of the

Correct Answer
verified

The muscle that originates along the entire length of the linea aspera of the femur is the

Correct Answer
verified

Exam 7: The Muscular System

Correct AnswerverifiedAChE is the enzyme that splits up acetyl...View AnswerShow Answer

"Anaerobic endurance"

Correct AnswerverifiedShow Answer

In infants,which muscle allows for the mouth to form a tight fit around the nipple during suckling at the breast?

Correct AnswerverifiedShow Answer

The deltoid acts to

Correct AnswerverifiedShow Answer

The specialized sarcolemma that contains acetylcholine receptors is the

Correct AnswerverifiedShow Answer

As a skeletal muscle contraction is initiated,acetylcholine binding alters the motor end plate membrane's permeability to

Correct AnswerverifiedShow Answer

Correct AnswerverifiedAs marathons require aerobic endurance,M...View AnswerShow Answer

Which of the following acts to flex the elbow?

Correct AnswerverifiedShow Answer

You are lying on the floor with your feet flat and your knees up practicing your abdominal crunches.You raise your upper body to the ceiling,up and down.What muscles are you using to the greatest extent?

Correct AnswerverifiedShow Answer

The skeletal muscles store calcium ions in the terminal cisternae of the

Correct AnswerverifiedShow Answer

Which of the following inserts into a tendinous sheet,rather than a bone?

Correct AnswerverifiedShow Answer

Which statement regarding "heat loss" is true?

Correct AnswerverifiedShow Answer

Acetylcholinesterase is found within the

Correct AnswerverifiedShow Answer

Neurotransmitters that cause skeletal muscle contraction are normally stored in

Correct AnswerverifiedShow Answer

Which of the following describes the action of the trapezius?

Correct AnswerverifiedShow Answer

Smooth muscle

Correct AnswerverifiedShow Answer

Structure I is composed of

Correct AnswerverifiedShow Answer

Which of the following inserts into the intertubercular groove of the humerus and acts to extend,adduct,and rotate the shoulder?

Correct AnswerverifiedShow Answer

Looking at the muscle name sternocleidomastoid,you would identify that this muscle is located in the area of the

Correct AnswerverifiedShow Answer

The muscle that originates along the entire length of the linea aspera of the femur is the

Correct AnswerverifiedShow Answer

Correct Answer
verified
AChE is the enzyme that splits up acetyl...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
As marathons require aerobic endurance,M...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
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