2. Complete the following statements concerning smooth muscle characteristics by inserting the correct terms in the...
2. Complete the following statements concerning smooth muscle characteristics by inserting the correct terms in the answer blanks. Endomysium 1. Whereas skeletal muscle exhibits elaborate connective tissue coverings, smooth muscle has a scant connective tissue_(1) smooth muscle 2. which is secreted by the_(2)_cells. The most common variety of smooth muscle, called_(3) smooth muscle, is arranged in unitary 3. opposing layers in the walls of hollow organs. Most often, there are (4)_ such layers, one running_(5)__and the other running (6) 4. As these layers alternately contract and relax, substances are squeezed along the internal passages. This phenomenon is called_(1) The 5. electrical coupling of the smooth muscle cells by_(8) __allows smooth muscle to contract as a unit because the_(9) spread from 6. cell to cell. Smooth muscle cells, referred to as _(10)_ cells, set the pace for the entire muscle sheet in some cases. Nerve endings 7. called_(11)_release neurotransmitter into wide synaptic clefts called (12)_. In smooth muscles, ionic calcium, which triggers contraction, enters the cytosol from both the SR and the (13) Ca²+ binds to the cytoplasmic protein_(14), which in turn binds 9. to_(15)_located on the myosin heads. (15)_catalyzes the transfer of (16)_ from ATP to the myosin heads, and cross bridge cycling begins. 8. 10. 11. 13. 15. 12. 14. 16.