Before external respiration occurs, the concentration or partial pressure of carbon dioxide in the alveoli is ________ than in the pulmonary capillaries.
A. lower
B. higher
C. no different
Answer: A
You might also like to view...
Structure #4 is where the protein
A) folds into its 3D shape and is possibly modified.
B) is converted into mRNA.
C) is released out of the cell.
D) combined with DNA to form nucleoproteins.
E) is endocytosed.
Active immunity
a. is self-generated upon exposure to antigen b. can be produced only as a result of a person actually having the disease c. involves administration of preformed antibodies d. is shorter in duration than passive immunity e. is acquired in the newborn as a result of the transfer of antibodies across the placenta during intrauterine development
Normal expirations are brought on by
a. contraction of the external intercostals. b. contraction of the internal intercostals. c. contraction of the diaphragm. d. elastic recoil of inspiratory muscles. e. elastic recoil of expiratory muscles.
The tissue surrounding an entire muscle is known as
A) epimysium. B) perimysium. C) endomysium. D) superficial mysium