Exam 48: Gas Exchange

Why would a tropical fish in a fish tank face severe respiratory problems (and possibly death) if the heater in the tank malfunctioned and caused extremely high water temperatures?

In humans, the effective thickness of the respiratory membrane increases dramatically when fluid accumulates in the lungs, such as during pneumonia.Using Fick's law of diffusion to frame your answer, what general health concern would arise under such conditions?

Which statement about the respiratory system of air-breathing insects is true?

Oxygen diffuses about _______ times more rapidly in _______ than in _______.

Which statement most accurately describes three containers of water at equilibrium with air but at low, medium, and high temperatures?

A high P_O2 gradient is maintained in bird lungs because

Bird and fish respiratory systems are similar in that both

The ability of hemoglobin to pick up or release O₂ depends on the _______ of its environment.

_______ is the movement of the external medium across the respiratory membrane, while _______ is the movement of an internal medium, such as blood, over the respiratory membrane.

The largest proportion of CO₂ carried by the blood is in the form of

Which statement about the structure of the fish gill is true?

What is the correct pairing of type of hemoglobin and description?

In the human gas exchange system,

One of the most serious effects of cigarette smoking on the lungs is the

Which statement is true?

In humans, arterial PCO₂ is monitored carefully by breathing centers in the medulla, and any changes in it lead quickly to changes in respiratory rate.The actual stimulus that leads to increased respiratory gas exchange is/are

In mammals, C-shaped bands of cartilage support the airways, but these supports disappear at the

Refer to the figure. This figure could represent a blood capillary in a

In tidal respiration, after extreme exhalation, the lungs and airways still contain a(n) _______ volume of air.

Refer to the figure showing a death's head hawkmoth larva. The series of holes labeled A in this larva are _______, which are part of the breathing system.They open to allow for gas exchange and close to prevent water loss.