Open Question
Compare skeletal, smooth, and cardiac muscles in regard to their microscopic anatomy, location and arrangement in body organs, and function in the body.
9. Muscle Tissue
Structure of a Skeletal Muscle
Struggling with Anatomy & Physiology?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
True or False: if false, chose the answer that corrects the statement.
The smallest contractile unit of a muscle is the muscle cell.
A
True.
B
False, the smallest contractile unit is the fascicle.
C
False, the smallest contractile unit is the myofibril.
D
False, the smallest contractile unit is the sarcomere.
Verified step by step guidance1
Understand the structure of a muscle: Muscles are composed of bundles of fibers called fascicles, which are made up of individual muscle cells or fibers.
Recognize the components within a muscle cell: Each muscle cell contains myofibrils, which are long chains of proteins.
Identify the smallest contractile unit: Within the myofibrils, the smallest contractile unit is the sarcomere, which is responsible for muscle contraction.
Clarify the role of the sarcomere: Sarcomeres are composed of actin and myosin filaments whose interaction leads to muscle contraction.
Correct the statement: The smallest contractile unit of a muscle is not the muscle cell, but the sarcomere.
7:12mWatch next
Master Organization of Muscle Tissue with a bite sized video explanation from Bruce Bryan
Start learningRelated Videos
Related Practice
Structure of a Skeletal Muscle practice set
Problem sets built by lead tutorsExpert video explanations