The correct option is C.
Obligate anaerobes are micro organisms that are poisoned and killed when exposed to the normal atmospheric oxygen concentration. These organisms can only survive in the absences of oxygen, therefore, they carry out only anaerobic form of respiration in order to obtain the energy that they need. <span />
The process of respiration system would not function well if the lungs was made up of only one big alveoli.
<u>Explanation:</u>
The main role of alveoli is to help the lungs to breath, for ventilation, diffusion and perfusion. The process of respiration system would not function well if the lungs was made up of only one big alveoli.
Alveoli are tiny to help the flow of oxygen and carbon dioxide, it helps the oxygen flow into the lungs and remove the carbon dioxide. If the alveoli is just one and big, then it would be hard to flow the oxygen through lungs and remove the carbon dioxide.
Therefore, it is good to have many tiny alveoli than one big one or the rib cage that protect the lungs could go through some damages.
1. the immune system tries to stop foreign agents by either killing cells directly or by b)creating an unstable environment
2. a chronic auto immune disease where the body produces antibodies that stick to the body's own cells causing the body to attack itself is called d) systemic lupus erythematosus
3. cells that police the body in blood and lymph to kill cancer cells and virus infected body cells are called a) natural killer cells
4. as an infant the ability to produce antibodies is a)limited
6. when abnormal antibodies in the blood start to target tissues with in the body casing paint swelling in joints general fatigue fever chills and headache it is called c) rheumatoid arthritis
8. the fluid that is forced out of the capillary beds by hydrostatic and osmotic pressure into the tissue space is called C) plasma
9. any substance capable of exciting the immune system and provoking an immune response is called a) an antigen
10. tonsils are to the throat as b) peyer's patches are to the intestine