Exam 43: Animal Transport Systems

The sun shining on a tidal pool during a hot day heats the water, causing some water to evaporate. Which of the following is most likely to occur because the water has become warmer and saltier?

Which of the following results in the greatest blood pressure in the mammalian aorta?

A molecule of CO₂ released into the blood in your left toe can be exhaled from your nose without passing through which of the following structures?

An electrocardiogram (ECG) provides information about ________.

When you hold your breath, which of the following blood gas changes first leads to the urge to breathe?

Which of the following best describes how an organism senses a disturbance in gas levels?

The human respiration rate is most closely correlated to the blood levels of which compound during most daily activities?

Which of the following mechanisms are used to regulate blood pressure in the closed circulatory system of vertebrates? I. changing the strength of heart contraction II. constricting and relaxing smooth muscle in the walls of arterioles III. opening or closing precapillary sphincters

In which of the following organisms does blood flow from the pulmocutaneous circuit to the heart before circulating through the rest of the body?

A paleontologist discovers the fossilized heart of an extinct animal. The evidence indicates that the organism's heart was large, was well-formed, and had four chambers, with no connection between the right and left sides. Which of the following conclusions is best supported by these observations?

Atmospheric pressure at the summit of Mount Everest is about one third the pressure at sea level, which is 760 mm Hg. What is the partial pressure of oxygen (PO₂) at the summit of Mount Everest if oxygen makes up 21% of the atmosphere by volume at both locations?

Which of the following is a normal event in the process of blood clotting?

Which statement best describes what happens to the carbon dioxide produced by humans?

Which one of the following organisms likely has the highest systolic pressure in its aorta?

Countercurrent exchange in the fish gill helps to maximize ________.

A rabbit taken from a meadow near sea level and moved to a meadow high on a mountainside would have some trouble getting adequate oxygen delivery. Which statement best explains why this would occur?

Which of the following represents the correct flow of air into the lung of a mammal?

Pulse is a direct measure of ________.

Damage to the external intercostal muscles, which are located between the ribs and function to help expand the chest cavity, will likely directly result in difficulty with which of the following functions?

Which hormone is released to stimulate the production of red blood cells?