chycen in the exhaled air haemoglobin in the me brengen in the medulla oblongation to change in the A glucose level of the blood oxygen level of the tissue fluid carbon dioxide levels of the blood. DATP levels of mitochondda (3X2) (6) QUESTION 2 (Questions taken from various sources) Give the correct biological term for each of the following descriptions. Write only the term next to the question number (2.1 to 2.3) in your ANSWER BOOK 2.1 The muscles between the ribs that are involved in the mechanism of breathing 2.2 The tendency of Ilving organisms to maintain a constant intercal environmont. 2.3 Air sacs in the lungs.​

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 ?

How does the nervous system affect the excretory system?