Contractile Physiology of Lymphatics

The Physiology of Contractile Vacuoles

Regulation of cardiac contractile proteins. Correlations between physiology and biochemistry.

Modulation of the functional properties of the contractile proteins of mammalian heart muscle plays a significant role in the response of the heart to beta-adrenergic stimulation. The most well understood modification is a change in the concentration of calcium ions that is required to activate the contractile system. By means of a cAMP-sensitive phosphorylation of the inhibitory subunit of tro...

Physiology of parturition

Labor is a physiological event involving a sequential, integrated set of changes within the myometrium, deciduas, and uterine cervix that occur gradually over a period of days to weeks. Biochemical connective tissue changes in the uterine cervix appear to precede uterine contractions and cervical dilation, and all of these events usually occur before rupture of the fetal membranes. In other wor...

The Physiology of Contractile Vacuoles X. Effects of High Hydrostatic Pressure on the Contractile Vacuole of a Suctorian

INTRODUCTION The effects of high pressure on living material are little understood and probably complicated. In a number of cases the tendency of cytoplasmic inclusions to become stratified by centrifuging is increased, and this is attributed to a decrease in protoplasmic viscosity (Marsland, 1942). High pressure is therefore considered to solate protoplasmic gels. In addition, high pressure af...

Lymphatics of the heart.

LYMPHATIC DRAINAGE of the heart has received little attention in the past but its potential importance has been recognized recently by several investigators.1-5 Review of studies of cardiac lymphatics4' 6 shows that many details of the anatomy of the system are still unknown, largely because of limitations of the technics of investigation. The small size and delicate structure of peripheral lym...