4.1.1 (Motor Unit - Nerve Cell)
The fingerlike projections coming out of a neuron cell body
What are dendrites?
The type of chemical released between a synapse
What is a neurotransmitter?
The line that moves closer during a muscular contraction
z line
Slow nerve transmission speeds, small muscle forces, contraction for a long period of time, fatigue resistant
What are slow twitch muscle fibers?
p is greater than .05
What is NOT statistically significant?
The tail of the nerve cell
What is the axon?
The specific neurotransmitter used to open the motor end plate
What is acetylcholine?
Required for the myosin heads to slide along the actin
What is ATP energy?
An example of an activity using slow twitch muscle fibers.
What is walking and jogging?
An example of an externally paced skill
What is receiving a pass in soccer or a pass in basketball?
What is myelin?
The molecule/element released into the muscle cell when acetylcholine reaches the motor end plate.
What is calcium?
Tropin and tropomyosin are proteins found in actin or myosin?
What is actin?
Fast neural transmission times and stronger contraction forces. Resistant to fatigue.
What is Type II a fast twitch?
Coaching style that is used with beginners or in dangerous situations.
What is command?
The junction (space) between a nerve cell and a muscle fiber.
What is the motor end plate?
A decrease in size due to a lack of exercising a muscle group
What is atrophy?
The zone that shortens during a muscular contraction
What is the H zone?
Example activities using Type II a fast twitch muscle
What is swimming and cycling?
Muscles that are anterior to the body
What are pecs, abs, quads?
Correct sequence of a nerve impulse along a nerve cell
What is dendrite --> cell body --> axon --> axon terminal --> motor end plate (synapse) --> muscle or another neuron
A neurotransmitter
What is a chemical released once the action potential (electrical impulse) reaches the end of the nerve cell?
The band that remains the same length during a muscular contraction.
What is the A band?
Fastest contraction time and largest force
Fatigue at a high rate so not used for long periods of time
Ex: sprinting & jumping
What is Type II b fast twitch muscle fiber?
The type of blood found traveling through the vena cava
What is deoxygenated blood?