Personal Fitness Unit 2: Cardiovascular Fitness -- help -- 10 points!?

primary function of the _________________ is to supply the blood with oxygen so that the blood can deliver oxygen to all parts of the body. (1 point)


Digestive system


Cardiac system


Respiratory system


Endocrine system


2. The ___________ is a strong wall of muscle that contracts to create a suction in the chest to draw in air and expand the lungs. When the muscle relaxes, the chest cavity decreases and the air is pushed out. (1 point)





3. Which of the following statements best describes how oxygen enters the lungs? (1 point)


Oxygen enters the lungs through the trachea, which branches into two tubes called the bronchi, which lead to the lungs


Oxygen enters the lungs through the diaphragm, which branches into two tubes called the trachea


Oxygen enters the lungs through bronchi, which branches into two tubes called the bronchioles


Oxygen enters the lungs through the trachea, which branches into the alveoli


4. External respiration takes place in the ____________________. (1 point)


Bronchi


Trachea


Alveoli


Diaphragm


5. Oxygen is carried by the ______________, which is part of the red blood cell. (1 point)





6. Select the answer below that best describes how the lungs are kept free of germs and dirt from the air. (1 point)


The alveoli act as filters for the lungs collecting particles of dirt and germs to be exhaled when the diaphragm relaxes


Tiny hairs known as cilia clean the trachea of dirt and germs before it can enter the lungs


Hairs known as cilia, found inside the alveoli, collect the dirt and germs to be expelled from the lungs


Mucus found in the bronchial tubes collects dirt and germs that gets into your lungs. Tiny hairs called cilia work to sweep out the debris collected to keep your lungs clean.


7. The term “a smoker’s cough” refers to ________________ , which is caused by a long-term inflammation of the bronchi. (1 point)


Emphysema


Lung cancer


Chronic bronchitis


Cilia degeneration


8. Janet smoked cigarettes since she was sixteen. Now at age 45, she suffers from shortness of breath, coughing, fatigue, sleep and heart problems, weight loss, and depression. Her condition is caused by a chronic lung condition that affects the alveoli. Janet suffers from: (1 point)


Emphysema


Lung cancer


Chronic bronchitis


Cilia degeneration


9. Both marijuana and tobacco smoke contain__________________, which are substances that cause cancer. (1 point)


Delta-9-tetrahydrocannabinol (THC)


Thiamine and dextrose


Enzymes


Carcinogens


10. Which of the following statements is not true? (1 point)


Smoking at an early age increases the risk of lung cancer. For most smoking-related cancers, the risk rises as the individual continues to smoke.


Teenage smokers suffer from shortness of breath almost three times as often as teens who don't smoke and produce phlegm more than twice as often as teens who don't smoke.


Teenage smokers are more likely to have seen a doctor or other health professionals for an emotional or psychological complaint.


People who quit smoking cannot reverse any of the damage that has been done to their lungs over an extended period of time.Personal Fitness Unit 2: Cardiovascular Fitness -- help -- 10 points!?
1 Circulatory system


2 Diaphragm


3 Oxygen enters the lungs through the trachea, which branches


into two tubes called the bronchi, which lead to the lungs


4 Alveoli


5 Haemoglobin


6 Mucus found in the bronchial tubes collects dirt and germs that gets into your lungs. Tiny hairs called cilia work to sweep out the debris collected to keep your lungs clean.


7 Emphysema


8 Emphysema


9 Carcinogens


10 Teenage smokers are more likely to have seen a doctor or other health professionals for an emotional or psychological complaint.