BIO 270 Exam 1 JMU Hynd Questions and Answers

BIO 270 Exam 1 JMU Hynd Questions and Answers What are the four primary tissue types? - ANSWER--muscle -epithelial -nervous -connective What type of fluid resides within the cell? - ANSWER--intracellular What are the two classes of homeostatic control systems? - ANSWER--intrinsic -extrinsic Milk-secreting glands are examples of exocrine glands (T/F) - ANSWER-True Body systems maintain homeostasis, a dynamic steady state in the internal environment (T/F) - ANSWER-True ©EMILLECT 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER 2024 Page 2/6 The form of endocytosis where whole cells, like bacteria, are brought in is ... - ANSWER-- phagocytosis Why do most cells in the body require oxygen molecules? - ANSWER--it accepts electrons from electron transport chain in the last part of cellular respiration What two compounds link the citric acid cycle and the electron transport system? - ANSWER--NADH FADH2 How many molecules of ATP are directly generated with each "turn" of the Krebs (citric acid) cycle? - ANSWER--one Secretory vesicles containing the finished protein products bud off the ____________________ and remain in the cytosol, storing the products until signaled to empty. - ANSWER--golgi complex Which statement about the plasma membrane is not true? - ANSWER-- serves as mechanical barrier to hold in contents of cell - selectively controls movement of molecules between the extracellular fluid and cytoplasm - ****barrier that surrounds blood vessels and separates blood plasma from interstitial fluid**** - contains proteins that provides for various membrane functions NADH is - ANSWER--produced in glycolysis ©EMILLECT 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER 2024 Page 3/6 -produced in citric acid (Krebs) cycle Which statement is true? - ANSWER-- mitochondria are primarily sites where anaerobic respiration occurs - peroxisomes are membranous sacs that contain digestive enzymes - ribosomes are organelles that synthesize RNA - ****none of the statements are true**** During anaerobic conditions, - ANSWER-- the degradation of glucose cannot proceed beyond the kreb cycle High demands for ATP make glycolysis alone an insufficient and inefficient supplier of power for most cells. (T/F) - ANSWER-True What form of endocytosis do white blood cells use in order to engulf bacteria? - ANSWER-- phagocytosis If red blood cells are placed in a(n) ____________________ solution, water will enter the cells by osmosis. - ANSWER--hypotonic A(n) ____________________ solution has the same concentration of non-penetrating solutes as normal body cells. - ANSWER--isotonic ©EMILLECT 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER 2024 Page 4/6 If solution A has a higher concentration of solute particles than solution B and if these solutions are separated by a semipermeable membrane, then there will be a net movement of water - ANSWER-- into solution A because water moves from low concentration to high concentration ____________________ act like "spot rivets" that anchor together two adjacent but non-touching cells. - ANSWER--desosomes The tonicity of a solution refers to the effect that the ____. - ANSWER--solution has on cell volume when the solution surrounds the cell A more direct means of expressing solvent concentration is the osmolarity of a solution, which is a measure of its total solvent concentration given in terms of the mass of particles. (T/F) - ANSWER- False ____________________ exists when no net movement of any ions takes place because all passive leaks are exactly balanced by active pumping. - ANSWER--steady state In _______________ transport, energy is directly required to move a substance _______________ its concentration gradient. - ANSWER--active; against Two ATP molecules could provide energy for a sodium-potassium pump to move ____ ions out of the cell for every ____ ions it moves into the cell. - ANSWER--6Na+