Acolorless, odorless, poisonous gas found in cigarette smoke is nicotine. tar. carbon monoxide. tobacco. 2. which important organ is part of the cardiovascular system? lungs brain stomach heart 3. what nutrient is essential for all of your body functions? proteins water carbohydrates fats 4. karen has a very busy schedule, and she is often not able to study until late at night. karen takes medicine that she doesn’t need because it her to stay awake while studying. this is an example of medicine abuse. medicine misuse. prescription medicine. over-the-counter medicine. 5. the period after a workout when you do lighter activity to get your heart rate and breathing back to normal is called physical activity. warm-up. exercise. cool-down. 6. one effect of tobacco use is a weakened immune system. what does it mean to have a weakened immune system? the heart rate is faster. the blood pressure is higher. the body is more vulnerable to disease. a person has less energy. 7. when can illegal drugs cause serious harm to your physical health? between five and 10 years when you have been using them for many years the first time you use them once you are addicted 8. any form of movement that causes your body to use energy is called fitness. physical activity. flexibility. body composition. 9. what is a symptom of alcohol poisoning? high body temperature seizures regular heartbeat fast respiration 10. the body system that is responsible for transmitting messages from other body parts back and forth to the brain is the cardiovascular system. nervous system. digestive system. skeletal system.