Describe three functions of lysosomes
What will be an ideal response?
Lysosomes may (1 ) remove damaged organelles, breaking them down to enhance recycling and membrane flow; (2 ) fuse with vesicles containing fluids or solids from the external environment to obtain nutrients or destroy pathogens; and (3 ) break down and release their digestive enzymes, resulting in the destruction of the cell (autolysis).
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Membranes that open to the exterior are called ________ membranes.
Fill in the blank(s) with the appropriate word(s).
Which cell structure regulates the composition of the intracellular fluid?
A. Ribosomes B. Nucleus C. Endoplasmic reticulum D. Cell wall E. Plasma membrane
Under normal circumstances, urea
A. is found in the filtrate and is reabsorbed, but is still found in the urine. B. never leaves the blood plasma. C. is filtered and reabsorbed totally. D. is filtered, but not reabsorbed.
Match the artery with the appropriate description.A. Supplies blood to the diaphragmB. Supplies blood to the esophagusC. Supplies blood to the thoracic wallD. Supplies blood to the pancreas and small intestineE. Supplies blood to the stomach, liver, and spleenCeliac trunk
Fill in the blank(s) with the appropriate word(s).