The fight-or-flight response. In reaction to stress, your body will either want to freeze or run away. For example, let’s say you suddenly see a bear in the park: you might experience the flight-or-fight response in reaction to seeing the bear because of the sudden stress you feel.
1. Stay inside when pollen counts are high
2. Control your indoor humidity
3. Be careful when doing outdoor work
True. Aside from warming up, it's a given fact that safety equipment for some specific physical activities are known to lower the risk of getting injured. The most notable sport that need this is skateboarding, where a helmet and some pads are being used.
Answer:
• Valve between the left atrium and left ventrical.
Explanation:
The first part of the heartbeat occurs through the sound of the mitral and tricuspid valves closing. These valves are located between the right upper heart chamber (right atrium) and right lower heart chamber (right ventricle).