WorksheetsMuscle Fibres
Total questions: 16
Worksheet time: 9mins
Name
Class
Date
1.
What would the predominant muscle fibre type be for this athlete?
a)
Slow Twitch
b)
Fast Twitch A
c)
Fast Twitch B
d)
Combination of Slow and Fast
2.
What are the characteristics of fast twitch muscle fibres?
a)
Explosive activities, fatigue slowly
b)
Endurance activities, fatigue slowly
c)
Explosive activities, fatigue quickly
d)
Endurance activities, fatigue quickly
3.
What would the predominant muscle fibre type be for this athlete?
a)
Slow Twitch
b)
Fast Twitch A
c)
Fast Twitch B
d)
Combination of Fast A and Fast B
4.
This is a muscle biopsy. What is the predominant muscle fibre type here?
a)
Slow Twitch
b)
Fast Twitch
5.
A motor unit is made up of _______________.
a)
all the muscle fibers within a given muscle
b)
a motor neuron and the muscle fibers it innervates
c)
all the neurons going into an individual section of the body
d)
a fascicle and a nerve
6.
Which one of the following is a key characteristic of slow twitch muscle fibers?
a)
They contain large amounts of Mitochondria
b)
They are fast to fatigue
c)
They are recruited last
d)
They contain low numbers of Mitochondria
7.
Muscle fatigue sets in due to the non-availability of
a)
calcium
b)
ATP
c)
actin binding sites
d)
sodium
8.
Fill-in-the-blank! Muscle, Fascicle, _____, Myofibril
a)
Muscle fibre
b)
Myofilament
c)
Sarcomere
d)
Actin
9.
Another name for Type II Fibres is....
a)
Fast Twitch
b)
Slow Twitch
c)
Medium Twitch
d)
Super Twitch
10.
World-class sprinters can have up to ____ more of fast twitch muscle fibres in their body
a)
20%
b)
40%
c)
60%
d)
80%
11.
Marathon runners can have up to ____ % or more of slow twitch muscle fibers in their bodies
a)
20%
b)
40%
c)
60%
d)
80%
12.
The average person has approximately what percentage of Slow Twitch fibres?
a)
20%
b)
40%
c)
60%
d)
80%
13.
During an isoinertial concentric contraction, what happens to the H zone
a)
Stays the same
b)
Gets bigger
c)
Gets smaller / disappears
14.
During an isoinertial concentric contraction, what happens to the A band
a)
Stays the same
b)
Gets bigger
c)
Gets smaller / disappears
15.
During an isoinertial eccentric contraction, what happens to the H zone
a)
Stays the same
b)
Gets bigger
c)
Gets smaller / disappears
16.
The 'All or Nothing Principle' relates to.....
a)
All motor units in a muscle
b)
All muscle fibres in a motor unit
c)
Each individual muscle fibre.
100 %
