What is the definition of A-Band?
A-Band: Refers to the part of the muscle cell that looks darker under a microscope. This area of the cell is darker due to the parallel arrangement of thicker filaments (myosin) and overlap with the thinner filaments (actin).
- As a muscle contracts, the A-band is where actin and myosin interact.
- Saladin, K. (2014). Anatomy & physiology: The unity of form and function. McGraw-Hill Higher Education, New York. ISBN: 9780073403717
Image: Sameerb in English WP, Copyrighted free use, https://commons.wikimedia.org/w/index.php?curid=764619
Related Terms
- Actin
- Myosin
- Sarcomere
- Muscle fiber
- Filament
- Z-line
- I-band
- H zone
Synonyms
- anisotropic
Related Courses
- Muscle Cell Structure and Function
- Muscle Fiber Types
- Muscle Fiber Dysfunction and Trigger Points