The enzyme catalase acts on the substrate
A. peroxidase.
B. oxygen.
C. hydrogen.
D. hydrogen peroxide.
Answer: D
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The kidneys control the pH of body fluids by adjusting three interrelated factors: H+ excretion, HCO3- excretion, and ammonia secretion
a. True b. False Indicate whether the statement is true or false
What is the pacemaker of the heart?
A) AV node B) SA node C) bundle of His D) Purkinje fibers
The ventricles completely empty when they contract in systole.
Answer the following statement true (T) or false (F)
Which conditions would result in a metabolic rate CLOSEST to the BMR (basal metabolic rate)?
A. a recently well-fed person sitting in class. B. a bed-ridden patient watching TV prior to breakfast. C. an athlete immediately after completing an exercise session. D. a person lying in a cold room and shivering.