Contraction and Relaxation

Relax Your Mind

Relaxation Techniques

Get Instant Access

Smooth muscle resembles the other muscle types in that contraction is triggered by calcium ions (Ca2+), energized by ATP, and achieved by the sliding of thin filaments over the

Smooth Muscle Cells Resembled Cell Lines
Figure 11.23 Varicosities of an Autonomic Nerve Fiber in Single-Unit Smooth Muscle.

Saladin: Anatomy & I 11. Muscular Tissue I Text

Physiology: The Unity of Form and Function, Third Edition thick filaments. The mechanism of excitation-contraction coupling, however, is very different. Little of the Ca2+ comes from the sarcoplasmic reticulum; most comes from the extracellular fluid and enters the cell through calcium channels in the sarcolemma. Some of these channels are voltage-gated and open in response to changes in membrane voltage; some are ligand-gated and open in response to hormones and neurotransmitters; and some are mechanically gated and open in response to stretching of the cell.

Was this article helpful?

0 0
Relaxation Audio Sounds Dusk At The Oasis

Relaxation Audio Sounds Dusk At The Oasis

This is an audio all about guiding you to relaxation. This is a Relaxation Audio Sounds with sounds from Dusk At The Oasis.

Get My Free MP3 Audio

Post a comment