Actin, myosin, tropomyosin and troponin molecules are made of what?
What is protein
100
The sarcomere is the measure between these two borders called:
What are Z-Lines
100
It is the connection between the myosin heads and the actin filaments known as the____________________effect
What is Cross-bridge
100
The arrangement of fibers that run equidistent side by side down the long axis of the muscle:
What is Parallel
200
Muscle Fibers are composed of myofibrils containing these:
What is Actin & Myosin filiments
200
These molecules are strung together into a twisted double strand of beads. This molecule is called
What is Actin
200
This marks the center of a sarcomere where there is only myosin:
What is H-Band
200
The toggling of the myosin heads on the actin is the stage of muscle contraction called the__________________
What is Power Stroke
200
When muscle fibers move closer together towards the end of the muscle belly
What is Convergent
300
This is a unit of contractile measure for muscles.
What is a sarcomere
300
While the muscle is at rest, hese long string molecules block entry of myosin heads into actin which causes contraction:
What is Tropomyosin
300
The area where actin & myosin overlap is called:
What is A-Band
300
Within the muscle fibers of motor units, no partial contraction takes place. This is known as
What is All or None response
300
Converging muscle fibers on both ends of a muscle is called:
What is Fusiform
400
The cell membrane of a muscle fiber is called
What is sarcolemma
400
This molecule holds the tropomyosin in place on the actin double helix:
What is Troponin
400
The area of the sarcomere where there is actin only:
What is the I-band
400
With an all or none response in a motor unit, only the muscle tissue of a specific portion of the muscle is activated. If more strength is required more motor units are activated. This is known as:
What is Recruitment
400
Muscles that are arranged in a round shape like around the eyes and mouth are called:
What is Circular
500
This is similar to, but not identical with the endoplasmic reticulum:
What is Sarcoplasmic Reticulum
500
Thick myofibril filaments are called:
What is Myosin
500
!!!!!Daily Double!!!!!
The arrangement of Actin & Myosin filaments resembles this shape
What is Honeycomb
500
The energy needed for contraction comes from a compound called
What is Adenosine Triphosphate (ATP)
500
Muscles are arranged around a central tendon where they extend diagonally giving the muscle a feather-like appearance.