The neuroglia that produce the myelin sheath around axons in the peripheral nervous system are called:

In a myogram of a twitch contraction, which period could be described as an upward deflection reflecting an increase in the force of contraction of the muscle?

Dorothy was walking through the woods arm in arm with two friends and her little dog, when all of the sudden a lion, a tiger and a bear jumped out of the bushes at them.  Dorothy jumped up and screamed “Lions and Tigers and Bears!  Oh My!”  She started running.  Her legs were churning and her heart was pumping.  When she finally stopped, she was completely out of breath.  After several minutes, her heart rate returned to normal, her breathing slowed and she started to calm down.  She turned to her little dog and whispered “Oh Toto!  There’s no place like home.” What portion of Dorothy’s PNS caused her legs to “churn”?

The spread of an impulse along the membrane of a neuron is called:

The site where bone lengthening occurs in a long bone is called the:

The _____ nervous system consists of sensory neurons and motor neurons that stimulate skeletal muscle contractions.

Which of the labeled structures in the diagram contains synaptic vesicles that store neurotransmitters?  

The space between an axon terminal of a motor neuron and the sarcolemma of a muscle fiber is called the:

Neurotransmitters are released from the _____ into the synaptic cleft.

Clusters of neuronal cell bodies that form gray matter in the brain are called: