Kurtz, Rafael. Ca clearance in visual motion-sensitive neurons of the fly studied in vivo by sensory stimulation and UV photolysis of caged Ca . J Neurophysiol 92: 458–467, 2004; 10.1152/jn.01058. 2003. In motion-sensitive visual neurons of the fly, excitatory visual stimulation elicits Ca accumulation in dendrites and presynaptic arborizations. Following the cessation of motion stimuli, decay ...

Amethod for saponin skinning of primary cultured rat aortic smooth muscle cells was established . The Saponin-treated cells could be stained with trypan blue and incorporated more "Ca" than the nontreated cells under the same conditions . At low free Ca" concentration, >85% of "Ca" uptake into the skinned cells was dependent on the extracellularly supplied MgATP. In the intact cells, both caffe...

An experiment was conducted to investigate the effects of K/Ca ratios of nutrient solution on physiological traits, cut flower vase life and postharvest changes of rose. The main experiment was factorial based on completely randomized design with two cvs. of rose (Magic Red and Capitol), five K/Ca ratios in the nutrient solution (4:4, 6:4, 6:3, 8:3, 10:2) and three replications. Increasing the ...

Background: Among anti-hypertension drugs, calcium (Ca) antagonists cause gingival overgrowth as a side effect. We previously discovered that this side effect was due to elevation of the calcium concentration in the cytosol ([Ca]i). Ca entry through non-selective cation channels (NSCCs) and Ca release from intracellular Ca stores are involved in this [Ca]i elevation. Furthermore, we discovered ...

To examine the relationship between serum calcium (Ca) concentration and radiographic knee osteoarthritis (OA).This study covered a total of 2855 subjects. The serum Ca concentration was detected by the Arsenazo III method. The radiographic OA of the knee was defined as changes equivalent to Kellgren-Lawrence grade 2 on 1 side at least. The serum Ca concentration was categorized into 4 quartile...

Caffeine induced contracture in frog auricular muscle at room temperature when the muscle was exposed to a Ca-rich solution. The initial transient tension lasted 10-30 sec, and it was inhibited by procaine. It was dependent on caffeine concentration and the time of exposure to a Ca-rich solution prior to caffeine attack, but was little dependent on Ca concentration during caffeine contracture.

Measurements were made of the free and total calcium concentrations ([Ca] and Cat), acid-base status, haemoglobin concentration, haematocrit and plasma protein concentration in the blood of the rainbow trout, Salmo gairdneri. In isolated blood, [Ca] was proportional to Cat while log[Ca] was inversely proportional to pH. Similar findings have been reported from human blood. During intense activi...

344 IntroductIon Calcium (Ca) is the most abundant inorganic element in human body along with sodium. Unique characteristic of calcium distribution in vivo with astronomical concentration gradients among the skeletal, extracellular and intracellular compartments ; 100,000,000 in bone, 10,000 in blood and 1 in intracellular compartment, provides the basis for its vital role in signal transductio...

We developed a mathematical model of calcium (Ca(2+)) transport along the rat nephron to investigate the factors that promote hypercalciuria. The model is an extension of the flat medullary model of Hervy and Thomas (Am J Physiol Renal Physiol 284: F65-F81, 2003). It explicitly represents all the nephron segments beyond the proximal tubules and distinguishes between superficial and deep nephron...