Why is it more difficult to obtain sufficient oxygen at higher altitudes? What will be an ideal response?
Concepts to Consider: Barometric pressure decreases at higher altitudes. The concentration
of oxygen in air is 21%, so the partial pressure of oxygen decreases along with barometric
pressure. Recall, oxygen flows from high pressure to low. At an altitude of 10,000 m, the
partial pressure of oxygen is 50 mm Hg, and arterial oxygen saturation is only 20% (normal
partial pressure of oxygen in blood is 100 mm Hg and 40 mm Hg in the tissues).
You might also like to view...
Organisms that live optimally in cold temperatures are called barophiles
Indicate whether the statement is true or false.
The first commercial product made with recombinant DNA techniques was ____________________. Fill in the blank(s) with the appropriate word(s)
Upon exposure to blue light, plants not only begin to grow toward the light, but move their chloroplasts to the sunny side of each cell. The adaptive advantage of moving chloroplasts to the sunny side of each cell _____
A) maximizes light absorption by the chloroplasts for photosynthesis B) increases production of phototropic hormones C) maximizes heat absorption by the chloroplasts for cellular respiration D) increases adenosine triphosphate (ATP) production during the light-independent reactions
Iris is a long-day plant that normally flowers in the spring. Which regimen would be the most effective in making an iris bloom in late fall?
A) interrupting the plant's nights at 2:00 am with a flash of far-red light B) interrupting the plant's nights at 2:00 am with a flash of red light followed by a flash of far-red light C) interrupting the plant's nights at 2:00 am with a red flash, then a far-red flash, then a red flash D) interrupting the plant's days at 2:00 pm by putting it in the dark