Pacesetter cell

Definition

Pacesetter cells are specialized cells within certain smooth muscle tissues that spontaneously generate and propagate electrical signals, thus setting the pace for the rhythmic contraction of the muscle. These cells are crucial in coordinating systematic contractions in organs such as the stomach and intestines to facilitate processes like peristalsis.

Related terms

Smooth Muscle:

A type of muscle tissue found in various organs that contracts slowly and automatically without conscious control.

Peristalsis:

The wave-like muscle contractions that move food through the digestive tract, facilitated by coordinated contractions initiated by pacesetter cells.

Electrical Signal: An impulse generated by cells to trigger actions such as muscle contraction, with pacesetter cells generating these signals to control smooth muscle activity