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Old age and the brain

In our early years 1 _____ brains grow very fast as we learn language, writing, numbers, music, and how to coordinate movement. By the time we are teenagers, each neuron in our brain has connected to tens of thousands of other neurons, and every time we have a new thought or memory, our 2 _____ makes new connections. Just as muscles get stronger by using them, the brain develops when it 3 _____ stimulated. 4 _____ stimulation, it gradually dies.

5 _____ healthy brain does not lose huge numbers of brain cells as it ages. It continues to rewrite itself and grow 6 _____ neurons. However, degenerative brain diseases are very common 7 _____ old age, and so we associate ageing with diseases such 8 ______ Alzheimer’s disease.

Even though these 9 _____ are very common in the elderly, it is a mistake to think that old age automatically equals mental decline. When elderly people who do not have Alzheimer’s diseases suffer age-related losses of memory and motor skills, it is often 10 _____ because of ageing, but because of inactivity and lack of mental stimulation.

d. Complete the following article by filling in one missing word in each space

Oral hygiene

Brushing your teeth regularly is not just about looking good and having fresh 1_____, it is about staying healthy!

The effects of poor oral hygiene 2 _____ widespread and serious. Apart from causing intra-oral 3_____ , poor oral hygiene 4 _____ been linked to heart disease, lung disease, and premature birth.

The source of all these problems 5 _____ plaque, a sticky white substance that forms on the teeth.

First, your dentist or dental hygienist can help you identify the places in the mouth where you are 6 _____ brushing properly. Then they 7 _____ advise you on correct tooth brushing and flossing techniques. In addition, they can remove the calculus (calcified plaque) that forms 8 _____ the teeth. This is far too hard to remove 9 _____ a toothbrush and needs to 10 _____ scraped off with special dental instruments.

e. Complete the following article by filling in one missing word in each space

Wild treatments

A lot of knowledge which we call “alternative medicine” has come from watching animals, because not every pharmacist is a human being – animals treat themselves 1 _____ medicines too. You may 2 _____ seen a dog or a cat eat grass, for example. They do this because it makes them sick, and clears their stomach of worms.

Bears know 3 _____ the medicinal properties of the root of a plant called Ligusticum. They chew its root, and apply the juice to wounds 4 _____ an antiseptic. Ligusticum is used 5 _____ Navajo Indians too. A folk story says they 6 _____ told about the plant by bears.

When some birds build their nests, they choose some aromatic plants that 7 _____ keep their babies healthy. The plants chosen by the birds are also used by herbalists 8 _____ skin problems such as ulcers, sores, and eczema.

Because bacteria 9 _____ becoming resistant to antibiotics, it is becoming more and more important to find alternatives, and zoopharmacognosy – a word from Greek meaning “animals’ knowledge of medicine”, may give us important new information about very old ways of dealing 10 _____ illness.