Muscular system 1
Thin filaments are made of protein molecules called___
actin
Thick filaments are made up of_____-
myosin
The energy required for muscle contraction is obtained from_________
ATP
The theory used to explain the process of muscle contractions.
Muscles only______,they don't push.
pull
Wrapped in perimysium
Fascicles
Muscle cells are long fibers that run parralel to each other and are held together by?
Endomysium
Skeletal muscle is covered by a fourth tough layer of connective tissue called the________
Deep fascia
What is the main overall function of the Muscular system?
Movement
Each myofibril is a chain of ________________.
sarcomeres
Which muscle cells have more than one nucleus, are striated and are controlled voluntarily?
Skeletal
What are the three types of muscle cells?
Skeletal, Smooth, and Cardiac
Turning of the bone around its own axis is called ___________.
Rotation
Movement of action towards the m-line is called _______.
Powerstroke
movement of a body part downward, parallel to the transverse (horizontal) plane is called ___________,
depression
The contractile unit of a skeletal muscle, situated between the Z-lines is called
Sarcomere
Moving your toes or foot upwards is an example of __________.
Dorsiflexion
This structure is where Ca+ ions travel to get to the actin filaments
T-Tubules
When a signal arrives at your motor neuron, the neuron releases ____________.
ACh
movement of a body part upward, parallel to the transverse (horizontal) plane is called ___________.
elevation
What are 3 general functions of the muscular system
Heat Production
Posture
Stabilizing Joints
Without _______, myosin heads can not "stretch" to reach tropomyosin.
ATP
Foot movement that turns the sole medially, towards the other foot/ midline of the body.
Inversion
Decreasing the angle of the joint, bones involved are moving together
flexion
Muscle Fibers are made of long organelles called_________.
myofibrils