Objective: To know the perception of university students of health sciences about virtual education. Material and methods: Descriptive study in 293 students of the Faculty of Health Sciences of the Jorge Basadre Grohmann National University in Tacna, Peru, during the second semester of the year 2020. A virtual questionnaire with prior informed consent with 26 closed questions was applied. Descriptive statistics were used and data were analyzed with STATA version 16. Results: In the development of virtual classes, students use more cell frequency (65 %) and laptops (62.4 %), with wireless internet (59.3 %). 87.7 % felt that their teaching and training has been affected and is insufficient, due to the lack of adaptation of the teacher to this modality and the lack of audiovisual resources for clinical practice (73.4 %); consider it very important that the practical classes are face-to face...

The nervous control of salivary secretion is exclusive to the autonomic nervous system, which has a sympathetic part, which originates from the thoracic segments; and a parasympathetic, which occurs through nerve signals from the salivary nuclei. Nerve control begins with gustatory stimuli, which are mediated by NCV3 (third branch of the trigeminal nerve), NC VII (facial nerve), and NCIX (glosopharyngeal nerve). In addition, the pathway that follows the stimulation for salivary secretion is: preganglionary fibers, ganglion, and fibers postanglionary parasympathetic fibers. Saliva is composed of 95 to 99 % water and the remaining percentage corresponds to solids that are subdivided into organic, where protein compounds such as enzymes and immunoglobulins are found; non-protein such as urea and inorganic compounds that behave as electrolytes. In addition,...