According to, a "synaptic knob" is formed by each axonal end branch adjacent to where the synapse and a tiny cleft are located. A neurotransmitter is released into the synapse from the vesicles as a nerve reaches... More »

The function of a synaptic knob is to change the action potential that is carried by axons into a chemical message. The chemical message then interacts with the recipient neuron or effector. This process is called synapt... More »

The neuron is the basic unit in the nervous system, acting as a specialized conductor cell that receives and transmits electrochemical nerve impulses, explains Dr. Ananya Mandal. A typical neuron has a cell body and long... More »

A monosynaptic reflex has only one synapse in between an outgoing motor response and an incoming sensory; a good example of this would be kicking the leg outward, which is also referred to as a knee jerk. Monosynaptic re... More »

The three parts of a synapse are the presynaptic ending, the synaptic cleft and the postsynaptic ending. An impulse traveling from one nerve cell to another must pass through all three parts to successfully cross the syn... More »

Little white bumps on the tongue can be related to enlarged papillae caused by an irritation of the taste buds, states WebMD. Fungiform papillae are the small bumps, which consist of taste buds, that are found on the ton... More » Science Human Anatomy Muscles

While both the pectoralis major and pectoralis minor muscles control the movements of the arm, the pectoralis major is specifically responsible for its lateral, vertical and rotational movement. In addition to this prima... More »