The physiological properties of plain muscle

Abstract

PART I: A general Review of Literature on the subject. Section 1. General characteristics and structural considerations .. .. .. .. 1 • Section 2. The Biochemistry of Plain Muscle 12 • Section 3. The excitability, tonus and contraction of plain muscle 22 • Section 4. Spontaneous rhythmicity of plain musclé; is it neurogenic or myogenic? The electrical phenomenon of smooth muscle .. .. .. .. .. .. 36. • Section 5. Two types of neuro- muscular transmission in the plain muscle tissue: transmittors of long duration (the humoral hypothesis) and the transmittors of short duration (the actioncurrent transmittor hypothesis. General conclusions .. .. .. .. 45 • PART II: A report on original research on certain properties of plain muscle found in the vascular and bronchial of the guinea pig lungs. Section 1. Broncho- and vaso-motor responses of guinea-pig lungs. Introduction .. .. .. .. .. .. 55 • I. Spontaneous variations in Intrapulmonary pressure and venous outflow .. .. .. .. .. .. 60 • II. Acetyl-choline .. .. .. .. 60 • III. Adrenaline .. .. .. .. 63 • IV. Nerves stimulations (Cervical vago- sympathetic nerves) .. .. 68 • Summary .. .. .. .. .. 76 • • Section 2. Nerve stimulations of controlled frequencies. (experiments and discussion .. .. .. .. .. 78 • Summary .. .. .. .. .. 84