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CRL Quiz 3 Muscles 2
1
This question shows a comparison of two different muscle fibres. In fibre A, the sarcomeres are grouped HORIZONTALLY in SERIES in the direction of contraction. In fibre B, the sarcomeres are grouped VERTICALLY, perpendicular to contraction. Which fibre generates the greatest DEGREE OF SHORTENING?
A
B
Same
2
The setup is the same as for question 1. Which fibre generates the HIGHEST VELOCITY?
A
B
Same
3
The setup is the same as for question 1. Which fibre generates the HIGHEST MAXIMUM FORCE LEVEL?
A
B
Same
4
The setup is the same as for question 1. Which fibre generates the GREATEST POWER?
A
B
Same
5
How can you increase the 'velocity' of a muscle? (i.e. what structural feature can be changed?)
Fibre types
Cross-sectional area
Length
Nutrition Answer 1 if A, B and C are correct
6
"As muscle can generate contractile force over a wide range of lengths we can consider length to be a relatively minor determinant of muscle force." This statement is...
True
False
Explanation: Remember the length-tension relationship.
7
"Muscle itself does not feel pain." This statement is...
True
False
8
Which of the following are effectors of muscle mass?
Nutrition
Age
Gender
Efficient muscle repair Answer 1 if only A, B and C are correct
9
Which of the following are indicators of muscle injury?
creatine kinase (CK) release from muscle
increased muscle calcium influx
decreased maximum force
muscle soreness (humans)
All of the above
10
What are the most important factors for efficient
muscle repair following muscle damage?
1 myoblasts
2 satellite cells
3 intact basal lamina
4 sarcolemma
6 Inflammatory response
All of the above
1, 2 and 3
2, 3 and 5