Paragraph: The kidneys perform several important functions in the human body. One of these is to regulate the amount of water that makes up the liquid part of blood. If too much water is present, the kidney will increase the amount of urine produced and lower the amount of liquid water in the blood. If the amount of water is too low, the kidney will decrease the amount of urine produced in order to conserve water.

Question:
A person spends several days in a hot, dry desert environment with little water available to drink. Which statement BEST summarizes how the kidneys will function during this time?

Options:
A) the amount of urine produced will increase to allow the body to eliminate heat
B) the amount of urine produced will increase in order to eliminate waste products from the body
Eliminate
C) the amount of urine produced will decrease in order to maintain the proper amount of water in the bloodstream
D) the amount of urine produced will decrease because the body will not be producing waste products during this time

Mouse liver cells were homogenized and the homogenate subjected to equilibrium density-gradient centrifugation with sucrose gradients. fractions obtained from these gradients were assayed for marker molecules (i.e., molecules that are limited to specific organelles). the results of these assays are shown in the figure. the marker molecules have the following functions: cytochrome oxidase is an enzyme involved in the process by which atp is formed in the complete aerobic degradation of glucose or fatty acids; ribosomal rna forms part of the protein-synthesizing ribosomes; catalase catalyzes decomposition of hydrogen peroxide; acid phosphatase hydrolysis monophosphoric esters at acid ph; cytidylyltransferase is involved in phospholipid biosynthesis; and amino acid permease aids in transport of amino acids across membranes. a) name the marker molecule and give the number of the fraction that is most enriched for each of the following cell components: lysosomes; peroxisomes; mitochondria; plasma membrane; rough endoplasmic reticulum; smooth endoplasmic reticulum.

Which group of algae is characterized by unicellular organisms and includes some members that would be better classified as zooflagellates? euglenophytes red algae sporozoans green algae

Common symptoms of an iron-defiency anemia include muscle weakness shortness of breath and lightheadedness why does iron deficiency causes these symptoms