(1) Locomotor skeletal muscle protein synthesis is sensitive to contractile activity and rapidly decreases within the first hours of reduced use.

(2) Smooth muscle fibers usually contract slowly but are capable of sustained contractile activity.

(3) The contractile activity in the distal esophagus was normal with propagating contractions of appropriate amplitude and duration.

(4) Good correlation exists between findings in vitro and the observed contractile properties in vivo.

(5) Smooth muscle cells possess a contractile apparatus consisting of actin and myosin filaments and the cytoskeleton.

(6) The muscular layers create vein contractility , which maintains venous tone.

(7) Hypercapnia can also decrease respiratory muscle contractility , leading to a vicious circle of carbon dioxide retention.

(8) Decrease myocardial oxygen demand by decreasing heart rate, systolic blood pressure, and contractility .

(9) Activation of the adrenergic system triggers the release of catecholamines, which stimulate contractility , heart rate, and blood pressure and promote myocyte hypertrophy.

(10) Studies performed in undernourished patients without respiratory disease have suggested that malnutrition may impair skeletal muscle contractility .