Muscle Anatomy
Microscopic Muscle movement
Muscle Tissue
Neuromuscular junction
Random questions
100
The tough connective tissue that connects skeletal muscle to bone
Tendon
100
What is the name of the neurotransmitter that initiates a muscle cell contraction at the motor end plate?
Acetylcholine
100
What is the arrow pointing to?
Tropomyosin
100
What is the name of the space between the terminal end of the motor neuron and motor end plate?
Synaptic Cleft
100
What is the name of a single muscle contraction
muscle twitch
200
What is the connective tissue layer around a single muscle fiber?
Endomysium
200
Where is calcium stored when a muscle is at rest?
Sarcoplasmic reticulum
200
What is the name of the molecule that Ca2+ binds to to expose the binding site on Actin
Troponin
200
What does ACh bind to?
receptors on the motor end plate
200
What is the name of the connective tissue that covers a bundle of muscle fibers?
perimysium
300
This is the area in between actin filaments. Changes size based on how contracted a muscle is
H zone
300
What is the role of ATP in a muscle contraction
Releases the myosin head from actin so it can bind again
300
What molecule covers the binding sites for myosin on the actin filament?
Tropomyosin
300
What is the general name for the chemicals the nervous system releases to communicate with cells?
Neurotransmitters
300
Fast twitch fibers have less of what than slow twitch?
2 things
blood supply and mitochondria
400
What is the area called in which there is no myosin filaments?
I band(or Light band)
400
What are the 2 factors that control how strong a muscle contraction is?
1. How frequent the muscle is stimulated(how quickly the myosin head binds/unbinds)
2. How many muscles fibers are being stimulated
400
Which part of the sarcomere remains constant in length during a muscle cell contraction.
Dark (A) band
400
The T tubule and Cisternae of the Sarcoplasmic reticulum on either side is know as the:
The Triad
400
Oxygen deficiency during exercise can lead to build up of?
lactic acid (pyruvate)
500
Functional unitl of a myofibril. It stretches from one z-line to the other z-line.
A Sarcomere
500
What pathway to regenerate ATP is best at creating ATP?
Aerobic Respiration(aerobic pathway)
500
muscle fibers that fatigue rapidly, but produce powerful contractions
fast-twitch fibers
500
Enough ACh must be released to trigger an all or none response. This called what on a myogram?
Threshold
500
What is this?
Myosin