All articles - Physiology

Aging is a decrease in the orderliness of body structures with age and an increase in their degree of wear, which is expressed in a decrease in the viability of the body, a decrease in functionality and adaptability, as well as an increase in the likelihood of diseases and death from various causes.

The steady increase in the incidence and mortality of the population from cardiovascular diseases (CVD) is one of the most important factors in the formation of a difficult demographic situation in the world, from which society suffers significant human losses and economic damage.

A conditioned reflex (temporal connection) is an individual reaction acquired during life through learning (as opposed to an unconditioned (innate) reflex). It is produced under certain conditions: the coincidence in time of the unconditioned stimulus and the neutral stimulus (a classic example: the presentation of food with the simultaneous ignition of a light bulb), as a result of which a reaction (for example, salivation) appears after a while to the presentation of only a neutral stimulus.

In our work, the stress reaction of the body, manifested in the digestive organs, was noted. Aggressiveness is an important form of zoosocial behavior in animals of different species, having adaptive significance and manifested by a species-specific set of behavioral reactions [4, 5]. But the peculiarities of the functioning of the digestive organs, depending on the behavioral characteristics of the body, are not sufficiently studied either in a normal state or under stress.

The article presents data on the study of the activity and topography of enteral enzymes in rats of mixed, non- aggressive and aggressive groups under conditions of immobilization stress. The experiments were carried out on adult outbred rats. The experiment revealed that the topography of the enzymatic activities of the corresponding enzymes in the mucosal homogenate taken along the entire small intestine is more variable.

The human thyroid gland is an unpaired organ consisting of two lobes connected by an isthmus. Normally, the thyroid gland is located on the anterior surface of the neck, fixed to the anterior and lateral surfaces of the trachea and larynx with connective tissue. The cells of the thyroid gland have a dual origin.

One of current problems of the modern neurophysiology is relationship of bark of larger hemispheres with subcortical structures of a brain. Among these structures a specific place is held by the hypothalamus differing in variety of the functional manifestations and playing an important role in a regulation of emotional and motivational, somatic and vegetative components of the composite reactions of adaptive behavior.

The article is devoted to the problems of adolescent development, the authors highlight the physiological and psychological changes in the child's body so that teachers and parents better understand children of this age category and are able to correctly structure their pedagogical goals and objectives.

Daily effects on growing rats with a high external temperature led to
phase changes in the activity of alpha-amylase in pancreatic tissue, the severity of which wasdifferent in animals receiving a particular diet. The task of the authors was to identify the specific features of the effect of hyperthermia on the activity of pancreatic enzymes.