Another name for pain receptors is
A. mechanoreceptors.
B. tactile corpuscles.
C. lamellated corpuscles.
D. nociceptors.
Answer: D
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The portion of the large intestine that empties into the rectum is the
A) sigmoid colon B) anus C) transverse colon D) descending colon
Radioactive materials and X-rays can cause ____________________ in DNA by disrupting exact copying of the nucleotide sequence
Fill in the blank(s) with correct word
Because of their short lifespan, a huge number of erythrocytes are recycled by macrophages. Which of the following is NOT a function of the macrophage?
A.) The macrophage phagocytizes hemoglobin from the bloodstream. B.) The macrophage synthesizes a small amount of hemoglobin and transports it to the bone marrow. C.) The macrophage phagocytizes deteriorating and fragmented erythrocytes. D.) The macrophage extracts iron from the heme portion of hemoglobin. E.) The macrophage dismantles the globin portion of hemoglobin into individual amino acids.
A single-celled eukaryotic organism:
A) Has a limited number of biomolecular machines. B) Must find food, shelter, a mate and reproduce C )Escape from predators D) None of the above E) a, b, c above.