Ch 8 - Skeletal, Nervous, Muscular Flashcards
In order for an impulse to move from one neuron to another, myelin must be released.
True
False
False
Dendrites conduct electrical impulses toward the cell body.
True
False
True
Neurons can transmit impulses because they are connected.
True
False
False
Neurotransmitters are released to carry impulses from one neuron to another.
True
False
True
There is only one axon in a neuron, but there can be hundreds of dendrites.
True
False
True
Stabilization of the deltoid muscles helps prevent subluxation of the humeral head from the glenoid fossa.
True
False
False
(Primary stabilizers of the humeral head are the rotator cuff muscles.)
Subluxation = dislocation
The posterior fibers of the deltoid extend and laterally rotate the humerus.
True
False
True
The muscles of the rotator cuff originate on the scapula.
True
False
True
When the rhomboids stabilize the scapula, the teres major can internally rotate the humerus.
True
False
True
The hamstring muscle group assists with knee extension.
True
False
False
The sartorius functions at both the hip and knee joints.
True
False
True
Flexion and external rotation at the knee are performed by the biceps femoris.
True
False
True
The four quadriceps muscles each have their own insertion point.
True
False
False
GTOs are sensory receptors located ____________________.
Between the muscle belly and its tendon
GTOs respond to muscle tension by causing the muscle to _______.
Relax
Golgi tendons cause _________ when the muscle contraction ceases.
Autogenic inhibition
During ________ stretching, the activation of the GTOs cause the muscle spindles to relax, thus increasing the stretch.
Static
Muscle spindles are located ________.
Parallel to the muscle fibers.
Muscle spindles respond to muscle fibers being overstretched by causing a ___________, known as the ___________.
muscular contraction; stretch reflex
When the muscle spindle’s reflex contraction occurs, it causes the antagonist muscle group to relax. This is called ___________ .
reciprocal inhibition.
Type 1 muscle fibers are considered slow-twitch.
True
False
True
Type 1 muscle fibers have a small amount of mitochondria compared to Type 2 muscle fibers.
True
False
False
Type 1 muscle fibers are fatigue-resistant.
True
False
True
Type 1 muscle fibers are used during anaerobic metabolism.
True
False
False
Endurance athletes generally possess a large percentage of Type 1 muscle fibers.
True
False
True
Type IIx muscle fibers are considered fast-twitch.
True
False
True
Type IIx muscle fibers are known as fast-glycolytic fibers.
True
False
True
Type IIx muscle fibers have a small amount of mitochondria.
True
False
True
Type IIx muscle fibers are less resistant to fatigue than type I fibers.
True
False
True
*keyword - LESS resistant
(IIx cannot sustain effort for more than a few seconds)
Type IIx muscle fibers are the largest and fastest muscle fibers in the body.
True
False
True
Type IIx muscle fibers have a limited capacity for aerobic metabolism.
True
False
True
Type IIa muscle fibers are fast-twitch muscle fibers.
True
False
True
Type IIa muscle fibers can be trained to be more oxidative or glycolytic.
True
False
True
Type IIa muscle fibers can only sustain activity for less than 30 seconds.
True
False
False
