What is the function of bicarbonate when it is secreted by the large intestine?
A. It increases the pH of the feces, which are acidic because of bacterial secretions.
B. It aids in the digestion of proteins
C. It decreases the pH of feces, which are alkaline because of bacterial secretions.
D. It aids in the digestion of cellulose.
A
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Communication between axons and muscle fibers occurs at specialized synapses called
A) nervous units. B) synaptic terminals. C) motor end plates. D) motor units. E) neuromuscular junctions.
Name several age-related factors that affect the respiratory system
What will be an ideal response?
This figure shows an anterior view of the right orbit. What muscle does number 1 indicate?
A. Superior oblique B. Medial rectus C. Superior rectus D. Lateral rectus E. Inferior oblique
Which of the following statements is true regarding parasympathetic tone?
A) It might increase or decrease heart rate depending on the situation. B) It accelerates the resting heart rate above its intrinsic rate. C) It holds the resting heart rate below its intrinsic rate. D) It affects heart rate only after myocardial infarction. E) It does not affect heart rate.