Exam 34: Circulation and Gas Exchange

Atmospheric pressure at sea level is equal to a column of 760 mm Hg.Oxygen makes up 21% of the atmosphere by volume.The partial pressure of oxygen in such conditions is

If,during protein starvation,the osmotic pressure on the venous side of capillary beds drops below the hydrostatic pressure,then

The set of blood vessels with the slowest velocity of blood flow is

Hemolymph is found in the circulatory system of what kind of animal?

What is the approximate oxygen saturation percentage of bar-headed goose hemoglobin on top of Mount Everest?

Atmospheric pressure at sea level is equal 760 mm Hg.Denver,Colorado,is at an elevation of 5,280 feet above sea level,and so the atmospheric pressure in Denver is ~623 mmHg.Oxygen is found in the same percentage at both sea level and in Denver.What is the partial pressure of oxygen in Denver compared to at sea level?

George is a 67-year-old male who was recently diagnosed with emphysema,a condition that causes shortness of breath due to damaged alveoli.George's physician measured his breathing ability and found that he was able to exhale less air than a healthy male should be able to.What is George's residual volume compared to a healthy male?

At sea level,atmospheric pressure is 760 mm Hg.Nitrogen gas is approximately 78% of the total gases in the atmosphere,so the approximate partial pressure of nitrogen is

Blood pH and cerebrospinal fluid pH are affected by carbon dioxide content.This enables the organism to sense a disturbance in gas levels as

Some human infants,especially those born prematurely,suffer serious respiratory failure because of

Pulse is a direct measure of

Heart rate will increase in the presence of increased

Damage to the sinoatrial node in humans

Air-breathing insects carry out gas exchange

Which of the following develops the greatest pressure on the blood in the mammalian aorta?

The meshwork that forms the fabric of a blood clot is

A group of students were investigating the effects of smoking on grass frogs for a research paper.They hypothesized that keeping the frogs in a smoke-filled environment for defined periods of time would result in the animals developing lung cancer.However,when they searched for previously published information to support their hypothesis,they discovered they were wrong in their original assessment.What potential harmful effects could carcinogens from tobacco smoke likely have on the frogs,if not lung cancer?

Sponges,cnidarians,and flatworms lack a specialized gas-exchange surface because

Gas exchange in the aquatic salamander known as the axolotl is correctly described as

The longest time a human has been recorded holding their breath is over 22 minutes! When you hold your breath,what happens to your blood chemistry?