The hypothalamic-pituitary-adrenal (hpa) axis becomes activated by a stressor. the hypothalamus produces corticotropin-releasing hormone which tells the anterior pituitary to produce adrenocorticotropic hormone, and adrenocorticotropic hormones stimulates the adrenal glands to produce cortisol. cortisol concentrations rise and this hormone binds to receptors on the hypothalamus and the anterior pituitary and tells the body to decrease the production of corticotropin-releasing hormone and adrenocorticotropic hormone. based on this information, the hpa axis is under the control of….

All living organisms are composed of a. only one cell. b. at least 100 cells. c. at least three cells. d. one or more cells.

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 statement is a physical property? becomes moldy quicklyeasy to digestconducts electricity poorlydoes not burn