In general, when comparing the effectiveness of over-the-counter antacids to sodium bicarbonate, how effective was sodium bicarbonate at neutralizing the acidity?
A) It had no effect
B) It was a lot more effective
C) It was a lot less effective
D) It had similar effectiveness
Answer: D
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Increased phosphate ion concentration is believed to contribute to fatigue by interfering with
A. calcium release from the sarcoplasmic reticulum. B. levels of available ATP to provide energy for contraction. C. phosphate release by myosin heads during crossbridge cycling. D. ACh release by synaptic knobs of motor neurons.
Which blood component is NOT correctly matched with its function?
A. erythrocytes - transport oxygen B. leukocytes - protect against disease C. platelets - phagocytize bacteria D. plasma proteins - maintain blood osmotic pressure; involved in clotting E. monocytes - become macrophages
Which muscle type depends solely on the sarcoplasmic reticulum as its calcium source?
A) Cardiac muscle B) Skeletal muscle C) Smooth muscle D) Smooth and cardiac muscle E) Skeletal and smooth muscle
According to the Frank-Starling law of the heart, the shorter the initial length of the cardiac muscle fibers prior to contraction, the more forceful will be the subsequent contraction because the fibers are already partially contracted
Indicate whether the statement is true or false