Вопрос школьника по предмету Биология
какое значение нервной регуляции в поддержании гомеостаза в организме?
Ответ учителя по предмету Биология
Роль гомеостаза в организме человека очевидна, ведь без поддержания внутренней среды организма в допустимых пределах, жизнедеятельность организма будет нарушена.
В тоже время, для организма очень важны организменные жидкости, которые входят в состав внутренней среды организма.
К таким жидкостям относятся цереброспинальная жидкость, плазма крови, межклеточное вещество и лимфа.
В том случае, когда хоть одна из этих жидкостей отсутствует в организме человека, или же присутствует в недостаточном количестве, нарушается работа организма и повреждается генетический материал.
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Brian works four days a week. Sometimes he’sfree at the weekend, butusually he works on Friday and Saturday. Friday and Saturday are very busy days for Eurostar because everybody wants to go on holiday or go home for the weekend. Eurostar runs every day (but it doesn’t run on Christmas Day).
The first train to Paris leaves London at 5.25 in the morning, so Brian starts work at 4.30. In one day he does two or three journeys between London and Paris. He finishes work at 12.00 noon. Sometimes he starts late — at 4.00 p.m. — and works until 11.30 at night. Sometimes he doesn’t go home at the end of the day, he stays in Paris.
The journey
The journey takes 2 hours 15 minutes, and the train travels at 300 km/h. It doesn’t go so fast in the tunnel — it only goes at 160 km/h when it travels through the tunnel. It carries 794 passengers.
When the train is in France, Brian speaks to his controllers in French. His French is very good. He has a lot of French friends, and his son, Toby, goes to stay with them in Paris.
Brian earns £45,000 a year. In his free time he likes going out with his wife, Angela, and walking their dogs. Angela is a chef, so she works at weekends too. She has Monday free and goes walking with Brian.
He has 25 days of holiday a year. Where does he go on holiday? ‘France, of course!’ says Brian.