In the study with experimental animals in vitro conditions, the aim of the research was to examine the effect of verapamil on the even brawniness of the isolated organ of the respiratory ways (tracheas) in guinea-pigs on acetylcholine and histamine, and in that way, to examine local mechanisms of smooth muscle system but also to exclude the rest of the neurohumoral influences. The guinea-pigs of both sexes (average weight of 500-700 gr), were used for this experiment. 10 guinea-pigs were included in the experimental research; the trachea was taken from them after the immolation. The preparations of isolated organs of trachea were divided into two groups (A and B). The previous incubation of trachea -5 isolated by verapamil (1 minute) in concentration 10 M significantly reduced the contraction caused by acetylcholine -4 (ascent 21.49±9.63, r=0.97, p<0.05). Concentration of verapamil 10 M also caused significant fall of contraction (ascent -5 21.3±12.63, r=0.95, p<0.05). Verapamil in concentration 10 M significantly reduces the response of isolated trachea cau- -6 -5 -4 sed by histamine in concentrations 10 M and 10 M (slope 21.3±10.6, r=0.96, p<0.05).Concentration of verapamil 10 M significantly reduced the contraction of smooth muscles of isolated trachea caused by histamine (slope 15.46±10.47, r= 0.94, p < 0.05).

Seronegative arthropathy represents group of rheumatic diseases which affects younger patients, more often male. Ocular findings are numerous such as conjunctivitis, iridocyclitis, and they are a part of extraarticular clinical manifestations. Acute anterior uveitis, as most common ocular manifestation, could be a sole or associated morbidity condition at the forme of systemic diseases.

The aim of this study was to determine the functional state of the feet of 40 boys aged 12 and 6 moths up to 13 and 6 months and by using the criterion variable of the 500 m run, to carry out a comparative analysis of their running speed. The subjects were divided into three groups: group I which numbered 14 boys with normal feet, group II which numbered 14 boys with high arches (pes excavatus) and group III numbering 12 boys with flat feet (pes planus). The diagnosis of the feet conditions was made following the inspection of the Achilles' tendon and the medial edge of the foot, followed by a plantogram. The statistical analysis of the results from the 500 m run was carried out by means of basic statistics, the analysis of variance (ANOVA) and the Ò criterion used to determine the source of the variability while testing the normality of the distribution. The analysis of the obtained results led us to the conclusion that foot deformities represent a negative factor for the ability to perform the 500m run which is one of the requirements in the battery of tests used in elementary schools. The analysis of variance, ANOVA, has indicated that there are significant differences between the boys in terms of their results for the 500 m run (p=.00). The difference between the average running time of the boys with normal feet and the boys with high arches is not statistically significant, while the differences between the average results of the run for the boys with normal and flat feet, as well as between the boys with high arches and flat feet are statistically significant, which led us to the conclusion that flat feet have a greater negative impact on the running ability than high arches. We can assume that boys with feet deformities (especially the ones with flat feet) will probably be less physically active than boys with high arches, which also leads to their significantly weaker running abilities. 

670 students, of 3rd, 5th and 7th grade, were examined. 50,6% were boys, 526(78,51%) healthy (3<PB<90), that is well nourished students, (257-38,36%) boys and (269-40,15%) girls. There is statistically significant frequency of normally nourished children of 3rd, 5th and 7th grade in comparison to the whole frequency of appearing of the numbered eating disorders (p<0,001). Undernourished (PB) were 18 students (2,68%), 9 boys (1,34%) and 9 girls (1,34%). Malnutrition is statistically the least frequent eating disorder with children of 3rd, 5th and 7th grade. Pre-obese (90<PB<97) were 92 students (13,73%), where 47 were boys (7,01%) and 45 were girls (6,72%). Pre-obesity is statistically the most frequent eating disorder among children of 3rd, 5th and 7th grade (p<0,05). 34 students (5,07%) were diagnosed with obesity, 26 (3,88%) boys and 8 (1,19%) girls. Statistically the obesity appears more often with boys than with girls of the same age (p<0,001). In general the least manifested eating disorder with students of 3rd, 5th and 7th grade, but also in each class separately, is undernourishment, which appears with the same frequency both with boys and girls. Generally the most manifested disorder in nourishment with students of 3rd, 5th and 7th grade, but also in each class separately, is pre-obesity which appears with the same frequency both with boys and girls. The level of obesity is the highest with the students of 3rd grade, and the lowest with the students of 5th grade.

A survey was made among the employees of the Health Centre Novi Sad. It included 237 people, of which 99.6% were health workers and 0.4% administrative workers. Among the respondents 8.4% occupied a managing post. The questionnaire included the issues relating to the satisfaction of the employees with working conditions, work-associated fatigue, comparison of the job satisfaction five years ago and now, plans for the next five years, and overall job satisfaction. Based on the answers of the respondents it comes out that only 36.3% of the health workers are satisfied and very satisfied with their jobs, which is a very small percentage regarding the nature of the work they do. However, 42.2% of health workers plan to remain in the public sector in the next five years, and 41.8% do not even think about changing the job. This was logical to expect bearing in mind the material position of the health care and overall economic situation in the society. 

Theoretical principle of computerized tomography was set by Czech mathematician J. Radon in 1917.The development of computerized tomography is connected with the name of A.M Cormack who, in 1963, started with the research directed at X-ray beam intensity measurement after passing through certain substance.First computerized tomography appartus was installed in Atkinson-Morley hospital in October in 1971 in London. Computerized tomography is based on making transverse(axial) cross-section of body parts,by X-ray beam passing through visible body part and by measurement of X-ray absorption degree using detectors. A cross-section picture of certain body part is obtained on a monitor as a final result of CT examination. A system of picture digitalisation and application of grey scale concept is particularly complex. Basic elements of CT are gentry, patient's bed, high-voltage generator, working and computer console, system for transferring picture on a film or other electronic media. Densimetric tissue values can be measured on the obtained CT picture. A change can be isodense, hypodense or hyperdense. Density change is expressed in Hounsfield units. Contrasting remedies can be applied, during CT, intracanalicular or intravenous. A better quality survey of changes increasing tissue density is obtained using them. CT application is indicated in diseases such as:neurocranium, visceral cranium, spinal column, thorax, abdomen, skeletal, joint and muscular system. X-ray side effects and precaution risks are being described in the text.

+Gz acceleration is unique dynamic stress to organism. Development of this occurrence depends not only to magnitude of acceleration but to onset rate and duration too. The most of former researches pointed to +Gz stress as significant stress to basic physiological mechanisms like cardiovascular and respiratory system. The new study was to examine responses of neuroendocrine and immune system to +Gz stress.

Strenuous exercises greatly increase oxygen consumption in the whole body, especially in skeletal muscles. Large part of oxygen consumption by the body is reduced to H O and ATP, but smaller part (2-5%) of these tremendious increase 2 oxygen consumption results in an increased leakage of electrons from the mitochondrial respiratory chain, forming various reactive oxygen species-ROS (O ˙ˉ, H O i OH˙). TheseROS are capable of triggering a chain of damaging biochemical and 2 2 2 physiological reactions such as oxidative stress and lipid peroxidatio. There is a groving number of informaztions pointing on important role of free radicals as mediators in inflamation and damage of skeletal muscles after strenuous exercise. The mechanism of exercise induced oxidative stress are not well understood. The mitochondrial electron transport chain, polymorphneutrophil and xanthine oxidase have been identified as major source of intracellular free radical generation during and after exercise. Also the interaction of metmyoglobin and methaemoglobin with peroxides may be also an importante source of oxidative stress during exercise.

Artrial hypertension is a very serious social-medical probleme as such has an epidemic characteristics according to high prevalence at incidence frequency disease of young, a high death rate, there is also a somewhat difficult erly diagnosis at the early stages of illnes due to unspecified clinical examination in majority of diseased. On the basis of etiology, arterial hypertension is divived into: primary (essential) and secondary (symptomatologic). According to the current criteria, primary arterial hypertension is considered to be all the cases where etiology cannot identify only the cause or a specific structural change in a organ. It instead causes a larger number of etiological factors by their group actions which are called risk factors.Including the secondary hypertension all cases at arterial hypertension are classified und there can be seen a specific structural change in an organ and disorder of it's function. The aim of our work was to determinate which were the familiar risk factors in development of arterial hypertension and it's domination to inhabitants of Zubin Potok considering high prevalence of arterial hypertension out of 6500 inhabitants in the infirmary of Zubin Potok, 2450 patients are registrated with arterial hypertension. Examination is performed to 100 patients with primary arterial hypertension by prospectus analysis which are registrated consecutively in the interval of two months by biochemicals parametars, a height of systolic and dyastolic arterial pressure and BMI. By means of questionnaire the rest of risk factors are gathered with a piece of data smoking, alchoholism and stress. During the examination we determined that the most typics risk factor is disorder of metabolism of lypoproteins, and important pathothysiological mechanism in development of arterial hypertension is reduction of HDLcholesterol, which can be one of indirect indentifier of oxidative stress.

Nowdays, reaction time is most often used in data processing as a quantitative method and technique for information step and speed processing. The aim of this investigation was to examine everyday work pressure on reaction time nd among students. An examination included 30 students of 2 year of Medicine Faculty 15 males and 15 females. Audible and visual simple reaction time as well as choice reaction time for 2, 4 and 6 stimuli was used for reaction time measurement. Measurements were done three times a day. Achieved results acknowledge statistically significant improvement of reaction time at noon compared to reaction time in the morning in all samples except for visual simple reaction time for male students. For all kinds of stimuli, reaction time were significantly prolonged in the evening in both groups. Therefore, we have concluded that morning activities had positive impact on students functional condition but afternoon activities acted like an additional stress that altered students latent fatigue to clearly observable acute fatigue.