BIO 446L Unit 1 Test Questions and Correct Answers
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Course
BIO 446
Institution
BIO 446
Cell Basic structure and functional unit of multicellular organisms Some are specialized Divided into to major compartments: cytoplasm and nucleus Have intracellular organelles Shape determined by cytoplasmic skeleton
Organelles Plasma Membrane Mitochondria Ribosomes Endoplasmic Reticulum Golgi Ap...
BIO 446L Unit 1 Test Questions and
Correct Answers
Cell ✅Basic structure and functional unit of multicellular organisms
Some are specialized
Divided into to major compartments: cytoplasm and nucleus
Have intracellular organelles
Shape determined by cytoplasmic skeleton
Plasma Membrane ✅Lipid bilayer
Proteins: integral, transmembrane, peripheral
Has carbohydrates and lipids to form coat (glycocalyx)
Lipid rafts in membrane
Transport ✅Some substances cross by simple diffusion
Other cross in vesicles
Endocytosis: substance enters a cell
Exocytosis: Substance leaves a cell
Phagocytosis
Pinocytosis
Receptor-mediated endocytosis
Epithelium ✅Close packed cells
Continuous sheets of single (simple) or multiple (stratified) cells
Free surface
Basal lamina (basement membrane)
Avascular
Nerve supply
High capacity for renewal
Epithelium functions ✅Mechanical protection
Absorption
Secretion of materials
Lubrication of surfaces
Surface of diffusion
Transportation
Excretion
Reception
Reproduction
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