1. The functions of the respiratory system are (choose 2)
A. to pump blood to the body**
B. to deliver oxygen to the body**
C. to remove carbon dioxide from the body
D. to absorb nutrients
2. ______ is a substance in tobacco products that causes stained teeth and skin
A. Nicotine
B. Carbon minoxide
C. Tar**
D. Menthol
ummmm im sure there is more than 2 questions there is 5 acctuly ._.
To answer these questions, you can refer to reliable sources such as textbooks or reputable websites that provide information on the respiratory system and the effects of tobacco products. Here's how you can find the answers:
1. The functions of the respiratory system are:
A. To pump blood to the body: This is not a correct function of the respiratory system. The heart is responsible for pumping blood, not the respiratory system. Therefore, option A can be eliminated.
B. To deliver oxygen to the body: This is one of the main functions of the respiratory system. Oxygen is taken in through breathing and transported to all cells in the body. Therefore, option B is a correct function of the respiratory system.
C. To remove carbon dioxide from the body: This is another primary function of the respiratory system. When we exhale, carbon dioxide (a waste product) is expelled from the body. Therefore, option C is a correct function of the respiratory system.
D. To absorb nutrients: This is not a function of the respiratory system. Nutrient absorption primarily occurs in the digestive system, not the respiratory system. Therefore, option D can be eliminated.
Therefore, the two correct functions of the respiratory system are options B (to deliver oxygen to the body) and C (to remove carbon dioxide from the body).
2. ______ is a substance in tobacco products that causes stained teeth and skin:
To find the answer, we need to identify which substances in tobacco products can cause stained teeth and skin.
A. Nicotine: Nicotine is the addictive substance found in tobacco products but it does not directly cause stained teeth and skin. Therefore, option A (Nicotine) can be eliminated.
B. Carbon monoxide: Carbon monoxide is a toxic gas in tobacco smoke, but it doesn't directly cause stained teeth and skin. Therefore, option B (Carbon monoxide) can be eliminated.
C. Tar: Tar is a sticky substance that is produced when tobacco is burned. It contains various chemicals that can stain teeth and skin. Therefore, option C (Tar) correctly identifies the substance responsible for stained teeth and skin.
D. Menthol: Menthol is a compound used to add flavor in some tobacco products, but it does not directly cause stained teeth and skin. Therefore, option D (Menthol) can be eliminated.
Hence, the correct answer is option C: Tar.
Actually for 1. I think its B and C
b and a for number 1 and a for number 2
1. b
2.c