chapter 10.4 muscle quiz

all skeletal muscles are _______, which means they are connected to a _______

• innervated, neuron

• motor neuron, synapse

• motor neuron, muscle fibers

• function, nerve impulse

A single neuron, called a _______, communicates with many muscle
fibers; each connection is referred to as a ______

• innervated, neuron

• motor neuron, synapse

• motor neuron, muscle fibers

• function, nerve impulse

The NMJ is the synapse where a single _______ communicates with
many _______

• innervated, neuron

• motor neuron, synapse

• motor neuron, muscle fibers

• function, nerve impulse

The ______ of the NMJ is to transmit a signal, called a _______ (an
action potential), from the neuron to the sarcolemma of the muscle fiber

• innervated, neuron

• motor neuron, synapse

• motor neuron, muscle fibers

• function, nerve impulse

_______ are chemicals that trigger changes in a target tissue
when released allowing for cell to cell communication

• Neurotransmitters

• synapse

• motor neuron

• innervated

what is the 3 phases that muscle contractions go through?

• stimulation, contraction, relaxation
• initiation, elongation, recovery
• excitation, contraction, relaxation
• activation, expansion, rest

what is the excitation phase?

• an action potential signals the release of
  acetylcholine from the axon terminal into the synaptic cleft

• the link between the stimulus and the
  contraction

• Ca++ ions bind troponin, which pulls
  tropomyosin away from actin’s active site; the crossbridge cycle then
  begins

• chemicals that trigger changes in a target tissue
  when released allowing for cell to cell communication

what is the Excitation-contraction coupling?

• an action potential signals the release of
  acetylcholine from the axon terminal into the synaptic cleft

• the link between the stimulus and the
  contraction

• Ca++ ions bind troponin, which pulls
  tropomyosin away from actin’s active site; the crossbridge cycle then
  begins

• chemicals that trigger changes in a target tissue
  when released allowing for cell to cell communication

what is the contraction phase?

• an action potential signals the release of
  acetylcholine from the axon terminal into the synaptic cleft

• the link between the stimulus and the
  contraction

• Ca++ ions bind troponin, which pulls
  tropomyosin away from actin’s active site; the crossbridge cycle then
  begins

• chemicals that trigger changes in a target tissue
  when released allowing for cell to cell communication

The end plate potential is generated by the
influx of _______ into the motor end plate.

• calcium

• sodium

• potassium

• chloride