The erythrocyte count increases after a while when an individual goes from a low to a high altitude because the a. temperature is lower at higher altitudes b. concentration of oxygen and/or total atmospheric pressure is lower at high altitudes c. basal metabolic rate is higher at high altitudes d. concentration of oxygen and/or total atmospheric pressure is higher at higher altitudes

During endocytosis, cells expel what they don't need take in what they need shrink due to loss of water

The pharynx is the structure in the body that serves as a pathway of both air and food. how does the body make sure that food does not get into the lungs? the salivary glands secrete enzymes that pull food out of the air pathway. the small intestine pushes the air out of the digestive system. the pancreas breaks down food in the air pathway. the epiglottis closes the air pathway so that food will not enter it.

Iwanna go do something with my ideas? ?