Deck 3: The Musculoskeletal System: The Musculature

Question 1

The pectoralis major is an example of a ____ muscle.

A) fusiform
B) fan shaped
C) penniform
D) quadrate

Answer 1

fan shaped

Question 2

What is a muscle that eliminates undesired muscle action called?

A) neutralizer
B) stabilizer
C) agonist
D) antagonist

Answer 2

neutralizer

Question 3

Which of the following illustrates primarily eccentric muscle contraction?

A) bending forward to touch fingers to floor
B) stepping up on a bench
C) holding a tennis racquet in ready position
D) standing at attention

Answer 3

bending forward to touch fingers to floor

Question 4

Why is there a greater range of motion in hip flexion with the knees bent than with them straight?

Question 5

What is the function of a stabilizer in muscular performance?

A) causes opposite action to one desired
B) cooperates with other muscles
C) prevents undesirable action of contracting muscles
D) supports body segment against pull of contracting muscles

Question 6

How does a muscle always contract?

A) toward the proximal attachment
B) toward the distal attachment
C) towards its center
D) toward the joint

Question 7

Which type of muscle contraction is it when contraction velocity remains constant?

A) isometric contraction
B) isotonic contraction
C) isokinetic contraction
D) eccentric contraction

Question 8

Which of the following illustrates concentric muscle contraction?

A) bending forward to touch fingers to floor
B) stepping up on a bench
C) holding a tennis racquet in ready position
D) standing at attention

Question 9

Given your knowledge of biarticular muscles, what would be an effective stretch for the hamstring muscles?
Provide a rationale for your answer.

Question 10

Which of the following is not an important factor in determining muscle function?

A) insertion (attachment) landmarks
B) joint that muscle crosses
C) muscle line of pull
D) muscle cross section

Question 11

Why is it easier to open someone else's clenched fist by pushing on the back of the hand rather than pulling on the fingers?

Question 12

Which of the following is true for fast twitch muscle fibers?

A) respond rapidly but fatigue easily
B) respond rapidly and fatigue slowly
C) are primarily postural fibers
D) respond slowly and are efficient

Question 13

What type of muscle tissue is skeletal muscle?

A) striated
B) smooth
C) cardiac
D) autonomic

Question 14

When the hip is fully flexed the rectus femoris is ____ likely to work during knee extension.

A) more
B) less
C) equally as
Short Answer Questions

Question 15

Which of the following simultaneous joint actions illustrate countercurrent biarticular muscle action?
1) flexion at knee--extension at hips
2) extension at knee--flexion at hips
3) flexion of fingers--flexion at wrist
4) extension of fingers--flexion at wrist

A) flexion at knee--extension at hips, extension at knee--flexion at hips
B) extension at knee--flexion at hips, flexion of fingers--flexion at wrist
C) flexion at knee--extension at hips, extension at knee--flexion at hips, flexion of fingers--flexion at wrist
D) extension at knee--flexion at hips, flexion of fingers--flexion at wrist, extension of fingers--flexion at wrist

Question 16

The rectus femoris is an example of a ____ muscle.

A) fusiform
B) fan shaped
C) bipenniform
D) quadrate

Question 17

Why is it difficult for some people to sit on the floor with straight legs and erect body?

A) antagonistic muscle action
B) restrictive internal structure of knee and hip joints
C) shortness and inelasticity of knee extensors
D) tension of two joint muscles

Question 18

Starting and ending in a standing position, analyze the hip joint in the motion of touching one's toes.

Question 19

What are actin and myosin?

A) bands in the sarcomere
B) tissue related to the myofibrils
C) sliding myofilaments
D) substances critical to binding of the sarcolemma and endomysium

Question 20

I have just walked down several flights of stairs and my knee extensor muscle hurt. Explain why going down causes fatigue in these muscles rather than the knee flexors.