Bill is a marathoner and is half way through the new york marathon. his legs (and some other muscles) are burning huge amounts of atp (total metabolic rate has increased to around 7 times basal). his cardiac output has risen to five times the basal rate. his respiratory rate has increased from 10 breath/min at rest to about 20 breath/min. his tidal volume has risen from 700 ml at rest to about 1525 ml. he weighs about 70 kg (~150 lb). if no other control actions or reflexes occur, what will be the effect on po2 at the alveoli:

a. increased by 30 mmhg,
b. largely unchanged,
c. decreased by 30 mmhg

Describe the primary and secondary immune response in terms of speed and number of antibodies produced?

The following image is of a diatom. it lives in water and gets food from photosynthesis. it is encased in a hard shell made of something similar to glass or sand . a diatom is a(n) because it has a) multi-celled organism; specialized parts. b) vertebrate; a skeleton. c) insect; an exoskeleton. d) single-called organism; only one cell.

Chinese privet is a plant that is native to china. over 150 years ago, chinese privet was introduced to the united states as a fast-growing shrub that serves as an excellent privacy hedge. with no natural herbivore, chinese privet quickly established itself and spread in natural areas throughout the southeast and eastern seaboard of the united states. its dominance in these areas has jeopardized the survival of native plant species. chinese privet provides evidence that introducing non-native organisms can cause environmental damage integrated pest management strategies will not decrease chinese privet populations american gardeners can easily control the spread of chinese privet non-native plant species have type i survivorship curves