4) Supongamos que el personaje de nuestra silueta tuvo como menú en su almuerzo unos ricos tallarines con carne, responde: a- ¿Qué tipo de nutrientes incorpora con estos alimentos?
b- Dichos nutrientes ¿qué función cumplen en el organismo?
c- ¿Qué tipo de digestión realizan los dientes durante la masticación? ¿y las enzimas digestivas?

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.

Describe the response the kidneys have to dehydration and excessive water intake. what happens to the concentration of urine in each case ?

Describe how a student should adjust the microscope to see the cells on a slide more clearly?