ASU BIO 181 FINAL EXAM
Blood pressure vs blood velocity changes along the circulatory system. -
CORRECT ANSWER-Flow = Velocity x Area
Optimal exchange can take place across capillaries (velocity and pressure
decrease)
Causes a drop in blood pressure in capillaries
Blood pressure versus osmotic pressure at the level of capillaries; how changes
in the pressure of
blood or protein concentrations may affect the movement of water across the
capillaries. - CORRECT ANSWER-Osmotic pressure is the pressure what would
have to be applied to a solvent to prevent it form passing into a solution by
osmosis.
Structural differences between arteries, veins, capillaries - CORRECT
ANSWER-Arteries: Thick muscular walls, small lumen, pushes blood along by
contraction (pulse)
Veins: Have valves to prevent the back flow of blood, thinner walls, wider lumen
Capillaries: One cell thick, smaller than veins and arteries, don't have valves or
muscular walls
Kinetic vs potential energy - CORRECT ANSWER-Potential: stored energy
(mountain rock, chemical bonds, concentration gradients)
Kinetic: energy of movement (heat)
Positive vs negative feedback - CORRECT ANSWER-Negative: most common,
results in reversal towards the set point
Positive: less common, results in amplification, further away from the set point
Difference between ventilation and gas exchange - CORRECT
ANSWER-Ventilation: provision of air/water (from atmosphere to lungs and vise
versa)
Gas exchange: made up of ventilation and perfusion surfaces, the amount of gas
present is important
Blood pressure vs blood velocity changes along the circulatory system. -
CORRECT ANSWER-Flow = Velocity x Area
Optimal exchange can take place across capillaries (velocity and pressure
decrease)
Causes a drop in blood pressure in capillaries
Blood pressure versus osmotic pressure at the level of capillaries; how changes
in the pressure of
blood or protein concentrations may affect the movement of water across the
capillaries. - CORRECT ANSWER-Osmotic pressure is the pressure what would
have to be applied to a solvent to prevent it form passing into a solution by
osmosis.
Structural differences between arteries, veins, capillaries - CORRECT
ANSWER-Arteries: Thick muscular walls, small lumen, pushes blood along by
contraction (pulse)
Veins: Have valves to prevent the back flow of blood, thinner walls, wider lumen
Capillaries: One cell thick, smaller than veins and arteries, don't have valves or
muscular walls
Kinetic vs potential energy - CORRECT ANSWER-Potential: stored energy
(mountain rock, chemical bonds, concentration gradients)
Kinetic: energy of movement (heat)
Positive vs negative feedback - CORRECT ANSWER-Negative: most common,
results in reversal towards the set point
Positive: less common, results in amplification, further away from the set point
Difference between ventilation and gas exchange - CORRECT
ANSWER-Ventilation: provision of air/water (from atmosphere to lungs and vise
versa)
Gas exchange: made up of ventilation and perfusion surfaces, the amount of gas
present is important
