Muscle Tissue Quiz
Questions: 16 · 10 minutes
1. A person intentionally lifts a cup from a table. Which tissue provides most of the force for this movement?
Smooth muscle in the blood vessels
Cardiac muscle in the heart wall
Skeletal muscle attached to bones
Smooth muscle in the digestive tract
2. A motor neuron branches and communicates with several muscle fibers. Together, that neuron and all the skeletal muscle fibers it controls form what?
A sarcomere
A motor unit
A myofilament
A fascicle
3. What directly produces the striped appearance of skeletal and cardiac muscle under a microscope?
Alternating layers of nuclei and connective tissue
Repeated junctions between muscle fibers and motor neurons
The orderly arrangement of thick and thin filaments into sarcomeres
Parallel rows of collagen fibers surrounding each cell
4. In skeletal muscle, calcium initiates contraction by binding to which protein?
Troponin
Tropomyosin
Myosin
Calmodulin
5. A bladder-wall sample shows layers of nonstriated cells capable of maintaining contraction as the organ fills. Which tissue has been identified?
Cardiac muscle tissue
Skeletal muscle tissue
Dense regular connective tissue
Smooth muscle tissue
6. Which description best distinguishes a typical cardiac muscle cell from a typical skeletal muscle fiber?
It is spindle-shaped and lacks striations
It is branched and usually has one central nucleus
It is long, unbranched, and has many peripheral nuclei
It contains no actin or myosin filaments
7. As a skeletal muscle sarcomere shortens during contraction, which region remains essentially the same length?
I band
Distance between the Z discs
H zone
A band
8. A microscopic specimen contains long, cylindrical, unbranched fibers with many nuclei located near their edges. Which tissue is the best match?
Skeletal muscle
Cardiac muscle
Smooth muscle
Dense irregular connective tissue
9. Which list contains the three recognized types of muscle tissue in the human body?
Skeletal, nervous, and cardiac
Skeletal, epithelial, and smooth
Cardiac, connective, and smooth
Skeletal, cardiac, and smooth
10. A tissue sample from the wall of a heart chamber contains branched, striated cells. What type of tissue is it?
Cardiac muscle tissue
Skeletal muscle tissue
Smooth muscle tissue
Elastic connective tissue
11. A biopsy shows spindle-shaped cells with one central nucleus and no visible striations. Which tissue is being observed?
Dense regular connective tissue
Smooth muscle tissue
Skeletal muscle tissue
Cardiac muscle tissue
12. Which structure mechanically and electrically connects neighboring cardiac muscle cells?
Neuromuscular junction
Intercalated disc
Tendon
Myelin sheath
13. Smooth muscle lacks troponin. Which calcium-binding protein helps activate its contraction instead?
Dystrophin
Titin
Calmodulin
Keratin
14. Which structures mark the boundaries of a sarcomere?
H zones
Intercalated discs
Z discs
Mitochondrial membranes
15. After a minor skeletal muscle injury, which cells can become active and contribute to repair of damaged fibers?
Erythrocytes
Intercalated disc cells
Osteoclasts
Satellite cells
16. During peristalsis, the wall of the intestine pushes food forward without conscious control. Which tissue performs this action?
Smooth muscle
Cardiac muscle
Stratified epithelial tissue
Visceral skeletal muscle