The region of the sarcomere made up only of thin filaments. The I band is bisected by a Z line. I bands alternate with A bands to give skeletal and cardiac muscle a striated appearance. I bands get shorter (and may disappear completely) during muscle contraction.
the form of sugar that circulates in the blood and provides the major source of energy for body tissues. When its level is low, we feel hunger.
A protein present in muscle fibers that aids in contraction and makes up the majority of muscle fiber; A type of protein filament that interacts with actin filaments to cause cell contraction.
a muscle that contracts without conscious control and found in walls of internal organs such as stomach and intestine and bladder and blood vessels (excluding the heart). involuntary muscle, not striated
product of fermentation in many types of cells, including human muscle cells, causng the muscles to get sore
Voluntary, striated muscle that moves bones, works in pairs and is attached to bones by tendons
Respiration in the absence of sufficient oxygen leads to a build up of lactic acid that has to be cleared when sufficient oxygen is available.
muscles that contract simultaneously with the prime mover to facilitate more effective movement(helps execute movement or steady a part)
actin attached to the ends of the sarcomere- the muscle fiber does not move but follows the contraction of the actin