What is incorrect about gas exchange?
A. Alveolar air is rich in oxygen and poor in carbon dioxide
B. Gas exchange takes place by diffusion
C. Blood that reaches the capillaries surrounding the alveoli is rich in oxygen and poor in carbon dioxide
D. Oxygen diffuses from the alveoli into the red blood cells in the capillaries and carbon dioxide diffuses into the alveoli
Select your answer:

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Nervous & Endocrine Systems BMI (Body Mass Index) Cardiovascular Med Terms Cell Vocabulary Muscle Tissues Forensics Terms Types of Nutrients Mechanical Digestion Cardiovascular Dermatology Herd Immunity Immunity & Cancer Foodborne Illness Vitals Health Unit CoordinatingOther quiz:
Microbiology › ViewWhat type of bond is formed between complementary nitrogenous bases in DNA?
A. Ionic bond
B. Covalent bond
C. Hydrogen bond
D. Metallic bond
Body Fluids & Circulation › View
Given above is the ECG of a normal human. which one of its components is correctly interpreted below?
A. Complex QRS one complete pulse
B. Peak T – initiation of total cardiac contraction
C. Peak P & Peak R together – Systolic & diastolic blood pressures
D. Peak P – initiation of left atrial contraction only