Hi !
Answer:
speeds up the heart beating : <em>adrenaline</em>
narrows arteries to increase blood pressure : <em>cortisol</em>
<em>only found in females : </em>estrogen
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Answer:
Rephrase rather than repeat, if the person doesn't understand what you're saying. Use non-verbal communication to help (eg pointing at a picture of someone you are talking about). If the person becomes tired easily, it may be better to opt for short, regular conversations.
Explanation: