Gas Exchange

Which of the following is not a structure for gas exchange in plants?

• Stomata

• Lenticels

• Flowers

• Guard Cell

Which of the following respiratory systems is not closely associated with a blood supply?

• The lungs of a vertebrate

• The tracheal system of an insect

• The gills of a fish

• The skin of an earthworm

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

• Rising oxygen

• Falling oxygen

• Rising carbon dioxide

• Falling carbon dioxide

Tags

NGSS.HS-LS1-3

The process of bringing oxygenated water or air into contact with a gasexchange surface is

• Respiration

• Ventilation

• Resuscitation

• Exhalation

Which of the following is brought about by infection and involves inflammation and fluid buildup in the lungs?

• Emphysema

• Pneumonia

• Asthma

• Cough

The driving for diffusion of oxygen across the cells of the respiratory organ is:

• The difference in partial pressure of oxygen in the environment and in the blood

• The partial pressure of carbon dioxide in the blood.

• The temperature

• The humidity

In negative pressure filling, air moves into the lungs when

• The volume of thoracic cavity increases

• The pressure in thoracic cavity decreases

• Air is forced down the trachea by muscular contractions of the mouth and pharynx

• A and B only

The group of vertebrates that relies on gas exchange across the skin as well as at the lungs to maintain sufficient blood oxygen levels is

• The fishes

• The reptiles

• The amphibians

• The mammals

With rare exceptions, how does the majority of the oxygen transported in the blood of vertebrates?

• By binding to plasma protein

• By binding to hemoglobin in erythrocytes

• As dissolved gas in the cytoplasm of erythrocytes

• As a component of large organic molecules that are broken down by the cells

Tags

NGSS.HS-LS1-7

Which of the following factors does not alter the rate of breathing by influencing the respiratory centers of the brain?

• Carbon dioxide partial pressures in the blood

• Oxygen partial pressure in the blood

• Blood glucose levels

• Blood pH