Chpt 19 Quiz 2

Where are the respiratory control areas located?

• Hypothalamus

• Alveoli

• Pons and medulla oblongata

• Cerebral cortex

The pharynx is an enlargement at the top of the trachea that houses the vocal cords.

• True

• False

How is oxygen transported in the blood?

• 90% bound to hemoglobin; 10% dissolved in plasma

• 95% bound to hemoglobin; 3% bound to albumin; 2% dissolved in plasma

• 98% bound to hemoglobin; 2% dissolved in plasma

• 100% bound to hemoglobin

The right lung has__________ lobes; the left lung has__________ lobes.

• three; three

• three; two

• two; two

• two; three

Why do premature newborns often develop respiratory distress syndrome?

• Their blood would have low oxygen concentrations.

• They do not have sufficient levels of surfactant.

• They lack a respiratory membrane.

• They are unable to contract their diaphragm in order to inspire.

What determines the intensity (volume) of a vocal sound?

• Force of air passing over the vocal cords

• Shape of the laryngeal cartilages

• Tension of the vocal cords

• Size of the laryngeal cartilages

Increased blood concentration of carbon dioxide leads to a(n)__________ in levels of hydrogen ions.

• decrease

• increase

Which of the following is not a function of the mucus-lined nasal passages?

• Warming inspired air

• Trapping small particles

• Moistening inspired air

• Cooling exhaled air

According to Boyle's law, as the volume of a container decreases,__________.

• the temperature increases

• the pressure increases

• the temperature decreases

• the pressure decreases

A mother and two young children are found passed out in their apartment, where a space heater is on. Emergency medical technicians suspect carbon monoxide poisoning. Why is carbon monoxide dangerous?

• It causes extreme depression of the respiratory rate.

• It drastically decreases the pH of the blood.

• It triggers hyperventilation, causing a severe drop in and increase in blood pH.

• It binds to the oxygen-binding site on hemoglobin, so the oxygen-carrying ability of the blood is reduced.