Max works out about an hour every day, using aerobic machines at a gym. During his
moderate physical exercise, blood concentrations of
A) oxygen decrease and carbon dioxide increase.
B) oxygen and carbon dioxide increase.
C) oxygen increase and carbon dioxide decrease.
D) oxygen and carbon dioxide remain nearly unchanged.
D
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During a routine brain scan it is discovered that Nick has a larger than average amygdala. How might Nick's family describe Nick?
A. Always relaxed, easy going B. Hilarious C. Jovial D. Confident E. Fearful
true or false? An enzyme can only bind one reactant at a time.
a. true b. false
You may have noticed that after a large meal you have had some difficulty breathing. Which explanation is most accurate with regard to this situation?
A. The food presses on the bronchi, making air flow difficult. B. The large quantity of food retards pulmonary blood flow. C. Oxygen to the lungs is restricted due to fullness in the stomach. D. A full stomach impedes contraction of the diaphragm, limiting inhalation.
What is true about tracts and nerves?
A) Only nerves are myelinated. B) Tracts are found only in the PNS. C) Nerves are found in both the CNS and the PNS. D) Tracts lack connective tissue coverings.