Terms
Sarcomere
Skeletal muscle tissue location
Skeletal Muscle
What separates each individual sarcomere?
Z discs
What is the name of the neurotransmitter that needs to diffuse across the NMJ's synaptic cleft to send a signal to begin a muscle contraction
Acetylcholine ACh
A chemical released by a neuron which diffuses across the synaptic cleft enabling the neuron to communicate with another cell.
Neurotransmitter
One motor neuron and all of the muscle fibers it innervates
Motor Unit
Is skeletal muscle tissue multinucleate or mono nucleated ?
Multinucleated
Name the myofilament(s) in the H zone
Myosin
Where is ACh stored?
In a synaptic vesicle in the presynaptic terminal
The area between a presynaptic terminal and postsynaptic membrane
Synaptic cleft
Excitability
Location of Smooth Muscle tissue
What 2 proteins are wrapped around actin filaments?
Troponin and Tropomyosin
What renders ACh inactive?
Acetylcholinesterase ACh-ase
Stimulus that is strong enough to create AP on all motor neurons to a particular muscle.
maximal stimulus
An individual muscle fiber contracts maximally in response to an action potential
All or None Law of Skeletal Muscle Contraction
What are the 3 tasks of Muscle tissue
Posture , heat and movement
What myofilament(s) are located in the I band?
What ion is needed to be released from the sarcoplasmic reticulum in order to attach to troponin ?
A stimulus too small to create an action potential in a neuron.
sub-threshold stimulus
Submaximal stimuli definition
Stimuli of increasing strength that create more action potentials along more neurons.
List the appearance of Cardiac tissue regarding nuclei and whether it is striated or not.
mononuclear per cell and striated
What myofilament(s) are in the A band
Actin and Myosin
What is the purpose of Calcium attaching to troponin?
In order for the active site to be exposed when tropomyosin and troponin move.
What is needed to give oxygen and nutrients for muscle fibers to contract and also removes C02 and waste as the muscles produce them
Blood vessels