Chapter 4, Problem 7TOF

A partial pressure gradient of oxygen exists between ________. a. air and lungs b. lungs and metabolically active tissues c. air at sea level and air at high altitudes d. all of the above

Which of the following statements is true for Bohr effect:       a.   Bohr effect describes carbon monoxide poisoning.     b.   Bohr effect prevents oxygen binding to hemoglobin.     c.   Bohr effect allows effective oxygen discharge in tissues due to higher acidity (decreased pH) than in lungs.      d. Bohr effect allows effective oxygen discharge in tissues due to lower acidity (increased pH) than in lungs.

Save water

If a fish close to the surface swam down to a depth of 10m below the surface it would need to ______ to maintain neutral buoyancy.   let air out of its swim bladder to keep the volume constant   let air out of its swim bladder to reduce the volume constant   put air into its swim bladder to keep the volume constant   put enough air into its swim bladder to double the volume

How will increasing the temperature in a fish tank from 69°F to 77°F change the concentration of oxygen gas?     It will decrease the concentration of O2     It will have no effect on the concentration of O2     It will increase the concentration of O2

Create an infographic about positive and negative feedback mechanism of regulation of gas concentration

Oxygen exchange (acquisition) in aquatic organisms is limited by __________ diffusion rate and __________ oxygen content, especially in __________ water temperatures.   A. high; low; lower   B. low; low; higher   C. high; high; higher   D. low; low; lower   E. low; high; higher

An adult takes about 12 breaths per minute, inhaling roughly 500 mL of air with each breath. The molar compositions of the inspired and expired gases are as follows: Species Inspired Gas (%) Expired Gas (%)O2 20.6 15.1CO2 0.0 3.7N2 77.4 75.0H2O 2.0 6.2The inspired gas is at 24°C and 1 atm, and the expired gas is at body temperature and pressure (37°C and 1 atm). Nitrogen is not transported into or out of the blood in the lungs. All nitrogen inhaled is exhaled. 1. Calculate the masses of O2, CO2, and H2O transferred from the pulmonary gases to the blood or vice versa (specify which) per minute. 2. Calculate the volume of air exhaled per milliliter inhaled. 3. At what rate (g/min) is this individual losing weight by merely breathing?

In a study of O2 uptake by muscle at high altitude, a physiologist prepares an atmosphere consisting of 79 mole % N2, 17 mole % 16O2, and 4.0 mole % 18O2. (The isotope 18O will be measured to determine O2 uptake.) The total pressure is 0.75 atm to simulate high altitude. Calculate the mole fraction and partial pressure of 18O2 in the mixture.