A serious genetic disorder known as hemochromatosis is often called the rusty organ disease and affects nearly 1.5 million Americans. The disorder causes increased absorption of intestinal iron. Which organ is responsible for iron homeostasis?
A. spleen
B. brain
C. lungs
D. liver
E. gallbladder
Answer: D
You might also like to view...
Which of the following pathogens does NOT require capsules or a slime layer for attachment?
A) Vibrio cholera B) Streptococcus pneumonia C) Bacillus anthracis D) All of these pathogens require capsules or slime layers for attachment.
_________ occurs when 50% of a protein produces a different phenotype than that produced by 100% or 0% of the protein.
A. Incomplete dominance B. Recessive inheritance C. Codominance D. Loss of function mutation E. Hybridization
An ecosystem is made up of ____
a. only plants, animals and fungi b. organisms and nonliving things c. only rocks and minerals d. only plants, protozoa, and fungi e. the biosphere of the region
Consider a U-tube that initially contains pure water on one side of a selectively permeable membrane
and water plus solute on the other side. Which of the following best describes what will happen next? a. Solute molecules diffuse across the membrane faster than water molecules. b. The fluid level rises on the side containing the pure water. c. The diffusion of water molecules causes an osmotic pressure to build up in the tube. d. Solute molecules are transported across the membrane by facilitated diffusion. e. Some water molecules become "bound up" with solute molecules and do not diffuse freely.