Why are damaged neurons usually not replaced?
A) Neurons are voluntarily controlled by the brain. B) Neurons are excitable cells.
C) Neurons are supported by neuroglial cells. D) Neurons are amitotic.
Answer: D
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Which muscle acts as an antagonist to trapezius?
A. Temporalis B. Rectus abdominis C. Erector spinae D. Sternocleidomastoid E. Splenius capitis
Parasympathetic neurons release acetylcholine onto cells in the atria of the heart, but not onto cells of the ventricles.
Answer the following statement true (T) or false (F)
Given the information in Figure 29.1, if C were an incomplete dominant trait, what would the phenotype ratio be for the offspring?
A) 1:1:1:1 B) 1:2:1 C) 1:3 D) 4:0
Which of the following statements about renal control of blood acid-base balance is TRUE?
A. Increased metabolism of glutamine by renal tubular cells increases the plasma bicarbonate concentration. B. Excretion in the urine of hydrogen bound to phosphate buffers decreases plasma bicarbonate concentration. C. H+ that binds to filtered bicarbonate in the tubular fluid is excreted in the urine. D. When hypoventilation occurs at the lungs, the kidneys compensate by reducing glutamine metabolism. E. The kidneys compensate for a metabolic alkalosis by increasing CO2 production.