Substances that enter the cell usually do so through the
A) integral proteins.
B) glycocalyx.
C) peripheral proteins.
D) glycolipids.
E) cholesterol.
A) integral proteins.
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Which of the following is a benefit of using phosphocreatine to store energy (as compared to ATP)?
A) Phosphocreatine can be used by almost any process requiring an input of energy. B) Phosphocreatine can diffuse more easily to areas needing energy. C) Phosphocreatine allows muscles to stop using ATP, conserving it for other uses. D) Phosphocreatine is produced during periods of high muscle activity.
Matching
A) Endocardium B) Parietal layer C) Myocardium D) Epicardium 14) The inner lining of the heart. 15) Heart muscle. 16) Serous layer covering the heart muscle. 17) The outermost layer of the serous pericardium.
Matching
A) Alveolar duct B) Segmental (tertiary) bronchi C) Type I alveolar cells D) Respiratory bronchioles E) Type II alveolar cells 11) NO exchange of gases occurs here. 12) Secrete a fluid containing surfactant. 13) Where the respiratory zone of the lungs begins. 14) Composed of simple squamous epithelium. 15) Terminates in alveoli. 16) Composed of cuboidal cells. 17) The respiratory membrane is composed of fused basement membrane of the capillary walls and ________.
Each hemoglobin molecule can transport up to ________ oxygen molecules.
A. 6 B. 4 C. 3 D. 5 E. 2