The sinoatrial node is normally the heart's pacemaker because it has the fastest spontaneous rate of diastolic depolarization.
Answer the following statement true (T) or false (F)
True
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In oxidative phosphorylation, energy for the synthesis of ATP is directly obtained from the
A) splitting of oxygen molecules. B) breaking of the covalent bonds in glucose. C) movement of hydrogen ions through channels in the inner mitochondrial membrane. D) combination of two atoms of hydrogen and one atom of oxygen to form water. E) oxidation of acetyl-CoA.
The blood vessels at the boundary of the cortex and medulla of the kidney are the
A) cortical radiate artery and vein. B) segmental artery and vein. C) interlobar artery and vein. D) glomerular artery and vein. E) arcuate artery and vein.
Many health food stores carry enzyme preparations that are intended to be ingested orally (by mouth) to supplement existing enzymes in various organs such as the liver, heart, and muscle. Use your knowledge of the digestion process to explain why these preparations are unlikely to be effective as advertised
What will be an ideal response?
What is a reflex?
A) A reflex is a slow, calculated action triggered by a single exposure to specific stimuli. B) A reflex is a slow, calculated action triggered by repeated exposure to specific stimuli. C) A reflex is a slow, calculated action involving input from the brain triggered by specific stimuli. D) A reflex is when sensory inputs are sent quickly to the brain for analysis before any response occurs. E) A reflex is a rapid, automatic response triggered by specific stimuli.