The existence of steep concentration gradients for Na’, K+, and Ca2+ across a wide variety
of cellular membranes is of considerable functional significance. First, these gradients allow …

Skeletal muscle is one of the major target organs for thyroid hormone. The muscles most
commonly affected are those used during prolonged effort (slow‐twitch muscles). One of the …

Nonthyroidal illness (NTI) and fasting in man are characterized by a low serum concentration
of T 3 and an increased serum concentration of rT 3 . Since the serum level of T 3 is one of …

Nutritional deficiencies of magnesium or zinc lead to a progressive and often marked growth
retardation. We have evaluated the effect of Mg and Zn deficiency on growth, serum insulin-…

The uptake and metabolism of T3 and T4 were investigated in cardiomyocytes isolated from
2-day-old rats. Myocytes (2-5 x 10(5) cells/well) were cultured for 1 day in medium with 5% …

Well-developed and functional muscle tissues are a prerequisite for healthy meat-producing
animals. Good muscle development leads to improved meat quality. Hence modern breeds …

Contents The final stages of cervical ripening and parturition resemble an inflammatory
process. Although the role of cytokines in both spontaneous and experimentally induced …

The stimulating effect of excitation on the Na(+)-K+ pump was characterized in measurements
of 22Na efflux, intracellular Na+ content, 86Rb influx, and [3H]ouabain binding in isolated …

1. Intact skeletal muscle fibres have been shown to contain a high concentration of [3H]ouabain
binding sites (100‐800 pmol g wet wt.‐1). Under resting conditions, however, it seems …

Growth retardation and impaired protein synthesis are major characteristics of potassium (K)-deficiency
in animals and man. We have evaluated the effect of K-deficiency on growth, …