1. which list describes the path oxygen takes to the blood? a. bronchi, alveolar sacs, alveoli, capillaries b. trachea, bronchi, capillaries, alveoli c. larynx, trachea, bronchi, capillaries d. pharynx, larynx, capillaries, alveoli 2. what function do the alveolar sacs serve in the respiratory system? a. cool and clean the air before it moves to the capillaries b. warm and clean the air before it moves to the alveoli c. increase surface area for gas exchange with the capillaries d. decrease pathogens in the air before it moves to the alveoli 3. how does air pressure control expiration? a. a decrease in air pressure within the lungs allows air to flow in. b. an increase in air pressure within the lungs allows air to flow out. c. a decrease in air pressure within the lungs causes them to contract. d. an increase in air pressure within the lungs causes them to expand. 4. what

There are specialized producers that live in warm water vents deep in the ocean. these producers do not per-form from photosynthesis, but instead perform a similar process with iron and other chemicals. why do you think these producers use this process instead of photosynthesis?

Where does all the water go? according to the environmental protection agency (epa), in a typical wetland environment, 39% of the water is outflow; 46% is seepage; 7% evaporates; and 8% remains as water volume in the ecosystem (reference: united states environmental protection agency case studies report 832-r-93-005). chloride compounds as residuals from residential areas are a problem for wetlands. suppose that in a particular wetland environment the following concentrations (mg/l) of chloride compounds were found: outflow, 60.4; seepage, 73.7; remaining due to evaporation, 26.4; in the water volume, 46.8. (a) compute the weighted average of chlorine compound concentration (mg/l) for this ecological system. (round your answer to one decimal place.) mg/l (b) suppose the epa has established an average chlorine compound concentration target of no more than 58 mg/l. does this wetlands system meet the target standard for chlorine compound concentration? yes. the average chlorine compound concentration (mg/l) is too high. yes. the average chlorine compound concentration (mg/l) is lower than the target. no. the average chlorine compound concentration (mg/l) is lower than the target. no. the average chlorine compound concentration (mg/l) is too high.

When in solution, a molecule that moves slowly across an artificial membrane moves rapidly across a plasma membrane. this molecule rapidly enters the cell regardless of whether its concentration is higher inside or outside the cell. using this information, which transport mechanism is most likely to be responsible for the movement of the molecule across a plasma membrane? view available hint(s)when in solution, a molecule that moves slowly across an artificial membrane moves rapidly across a plasma membrane. this molecule rapidly enters the cell regardless of whether its concentration is higher inside or outside the cell. using this information, which transport mechanism is most likely to be responsible for the movement of the molecule across a plasma membrane? active transportexocytosis