Respiratory System

gas exchange happens in the ___

• alveoli

• capillaries

• tissues

• bronchioles

T or F

gases diffuse across membranes because of a concentration gradient until the concentrations on both sides of the membrane are equal

• T

• F

expired air has more carbon dioxide

inspired air has more oxygen

• TF

• FT

• TT

• FF

what are the factors that influence gas exchange

• membrane area

• solubility of gas

• concentration of gases

• membrane thickness

• permeability/diffusion of the gas

the blood flow to alveoli

air flow to the alveoli

most of the oxygen is transported in the blood by

• hydrogen ion

• hemoglobin

• bicarbonate ion

• carbonate ion

most of the carbon dioxide is transported in the blood as

• hydrogen ion

• hemoglobin

• bicarbonate ions

• carbonate ion

respiration is controlled by respiratory centers in the

• brainstem

• cerebellum

• cerebrum

• pons

• medulla oblangata

the respiratory system is sensitive to changes in CO₂ and H⁺

• T

• F