Biological characteristics refer to the morphological and physiological characteristics exhibited by individual organisms. The indicators of individual biological characteristics mainly include physical indicators such as height, weight, chest circumference, and health-related physical indicators such as blood pressure, grip strength, and vital capacity. This article mainly introduces the cause analysis and preventive measures of a physical fitness test in colleges and universities based on biological characteristics and intends to provide ideas and directions for the cause analysis and preventive measures of a physical fitness test in colleges and universities. This paper proposes a research method for the cause analysis and preventive measures of sports injuries in college physical fitness tests based on biological characteristics. Research experiments on the cause analysis and preventive measures of sports injuries in the physical fitness test of colleges and universities. The experimental results in this paper show that the most frequent cause of sports injuries among boys is lack of self-protection awareness, with a probability of 24.24%; among girls, the most frequent cause of sports injuries is insufficient flexibility, with a probability of 22.86%.
Our study intends to assess the effect of transplantation of bone marrow mesenchymal stem cells (BMSCs) on nerve cell in rats with cerebral infarction and injury. 36 healthy rats were separated into JS group (sham-operation), NG group (cerebral infarction) and YZ group (BMSCs transplantation).
The arrangement of brain tissue in JS group was integrated without edema and confused in NG group with obvious edema. However, the necrosis degree of brain tissue in YZ group was alleviated. There were symptoms of muscle loss in the right foreleg and hind leg of rats in NG group. The NSS score
in NG group was higher than JS group (P < 0.05), suggesting that the neurological function after BMSCs transplantation was improved. The distribution of cortical tissue was tight and nervous tissue distribution in NG group was evacuated comparatively. The quantity of nerve cell was
reduced with tumescence. In conclusion, transplantation of BMSCs exerts a promising therapeutic effect on the treatment of cerebral infarction as it can improve nerve cell function, reduce oxidative stress and inflammatory cytokines secretion, and ameliorate cerebral injury.
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