BIO 251 EXAM 1

BIO 251 EXAM 1 Which of the following accurately represents the levels of organization for the human body, from least to most complex? - correct answer-Cells, tissues, organs, organ systems Which of the following is NOT a primary tissue in the body? - correct answer-Digestive Which of the following is incorrect? - correct answer-Lipids are synthesized in the nucleus Actin is found in what type of cytoskeletal filament? - correct answer-Microfilament Direct communication between cells is carried out by _________, which allow ions and small molecules to diffuse directly from one cell to the other. - correct answer-Gap Junctions What are the two major extracellular fluid (ECF) compartments of the body? - correct answer-Interstitial fluid and plasma The body fluid compartment with a high sodium (Na+) concentration is - correct answer-Extracellular fluid (ECF) Which of the following statements about homeostasis is FALSE? - correct answer-The primary mechanism to maintain homeostasis is positive feedback Which of the following components of the plasma membrane forms ion channels? - correct answer Integral membrane proteins Which of the following most accurate describes the plasma membrane? - correct answer-The polar regions of the phospholipids are in direct contact with water in both intracellular fluid and extracellular fluid compartments