1. A whole skeletal muscle is organized into groups of muscle fibres called:
A.
Fascicles
B.
Sarcomeres
C.
Myofilaments
D.
Tendons
Correct Answer:
Fascicles
Explanation:
A skeletal muscle is made up of bundles of muscle fibres called fascicles.
2. A skeletal muscle fibre is also known as a:
A.
Muscle cell
B.
Bone cell
C.
Nerve cell
D.
Blood cell
Correct Answer:
Muscle cell
Explanation:
A skeletal muscle fibre is a single, elongated muscle cell.
3. Which structure is made up of many myofibrils?
A.
A muscle fibre
B.
A fascicle only
C.
A tendon
D.
A ligament
Correct Answer:
A muscle fibre
Explanation:
Each skeletal muscle fibre contains numerous thread-like structures called myofibrils.
4. The basic repeating unit of a myofibril is the:
A.
Sarcomere
B.
Fascicle
C.
Muscle fibre
D.
Epimysium
Correct Answer:
Sarcomere
Explanation:
Myofibrils are arranged in repeating units called sarcomeres.
5. Which is the correct order of skeletal muscle organization from largest to smallest?
A.
Muscle, fascicle, muscle fibre, myofibril, sarcomere
B.
Sarcomere, myofibril, muscle fibre, fascicle, muscle
C.
Muscle fibre, muscle, fascicle, sarcomere, myofibril
D.
Fascicle, muscle, sarcomere, muscle fibre, myofibril
Correct Answer:
Muscle, fascicle, muscle fibre, myofibril, sarcomere
Explanation:
A whole muscle contains fascicles, fascicles contain muscle fibres, muscle fibres contain myofibrils, and myofibrils contain sarcomeres.
6. The connective tissue layer surrounding an individual muscle fibre is called the:
A.
Endomysium
B.
Perimysium
C.
Epimysium
D.
Periosteum
Correct Answer:
Endomysium
Explanation:
Endomysium is the connective tissue sheath surrounding each individual muscle fibre.
7. The connective tissue layer surrounding a fascicle is called the:
A.
Perimysium
B.
Endomysium
C.
Epimysium
D.
Endosteum
Correct Answer:
Perimysium
Explanation:
Perimysium surrounds and supports each bundle of muscle fibres, called a fascicle.
8. Which connective tissue layer surrounds the entire skeletal muscle?
A.
Epimysium
B.
Endomysium
C.
Perimysium
D.
Myometrium
Correct Answer:
Epimysium
Explanation:
Epimysium is the outer connective tissue covering of a whole skeletal muscle.
9. A fascicle is best described as:
A.
A bundle of muscle fibres
B.
A bundle of sarcomeres
C.
A single myofibril
D.
The outer covering of a muscle
Correct Answer:
A bundle of muscle fibres
Explanation:
A fascicle is a group or bundle of skeletal muscle fibres enclosed by connective tissue.
10. Which structure lies directly inside a muscle fibre?
A.
Myofibril
B.
Fascicle
C.
Whole muscle
D.
Tendon
Correct Answer:
Myofibril
Explanation:
Myofibrils are internal structures within a muscle fibre and extend along its length.
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