BIO 400 - Exam 1 Questions and
Answers 100% PASS
Diving Challenges - CORRECT ANSWER-1. Increasing pressure on gases with
depth
2. Can not obtain oxygen underwater/ Low oxygen to vital organs (brain, heart)
3. Terrestrial appendages not efficient for swimming
Variations in diving depths of Marine Mammals (image) - CORRECT ANSWER-
How to maintain oxygen levels on dives? - CORRECT ANSWER-1. lungs = still a
reservoir for O2
2. muscle = more myoglobin, is O2 transport molecule (redder = more myoglobin)
3. blood = more hemoglobin, is O2 transport molecule
Lungs (Oxygen store) - CORRECT ANSWER-1. lungs = still a reservoir for O2
2, lung volume marine mammals ~ terrestrial mammals
3. highly effective gas exchange at sea surface before & after dive
, muscle (Oxygen store) - CORRECT ANSWER-1. Myoglobin is a O2 transport
molecule
2. Marine mammals 3-7x myoglobin than terrestrial mammals
Blood (Oxygen Store) - CORRECT ANSWER-1. Hemoglobin is an O2 transport
molecule
2. Deep diving mammals have on average more hemoglobin
Blood volume - CORRECT ANSWER-longer dive durations associated with
Higher percentage of blood per total body mass
Rete Mirabilia - CORRECT ANSWER-"wonderful maze" specialized arterial
structures where an incurrent artery gives rise to numerous branching and
anatomizing vessels that will be drained by a second (excurrent) artery (ex.
glomeruli, temperature in sharks)
Diving Physiology - CORRECT ANSWER-oxygen stores = lungs + muscle +
blood
Mammalian Dive Response - CORRECT ANSWER-bradycardia = heart rate
slows
select ischemia = blood flow to vital organs
hypometabolism = lower O2 consumption rate
COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED
Answers 100% PASS
Diving Challenges - CORRECT ANSWER-1. Increasing pressure on gases with
depth
2. Can not obtain oxygen underwater/ Low oxygen to vital organs (brain, heart)
3. Terrestrial appendages not efficient for swimming
Variations in diving depths of Marine Mammals (image) - CORRECT ANSWER-
How to maintain oxygen levels on dives? - CORRECT ANSWER-1. lungs = still a
reservoir for O2
2. muscle = more myoglobin, is O2 transport molecule (redder = more myoglobin)
3. blood = more hemoglobin, is O2 transport molecule
Lungs (Oxygen store) - CORRECT ANSWER-1. lungs = still a reservoir for O2
2, lung volume marine mammals ~ terrestrial mammals
3. highly effective gas exchange at sea surface before & after dive
, muscle (Oxygen store) - CORRECT ANSWER-1. Myoglobin is a O2 transport
molecule
2. Marine mammals 3-7x myoglobin than terrestrial mammals
Blood (Oxygen Store) - CORRECT ANSWER-1. Hemoglobin is an O2 transport
molecule
2. Deep diving mammals have on average more hemoglobin
Blood volume - CORRECT ANSWER-longer dive durations associated with
Higher percentage of blood per total body mass
Rete Mirabilia - CORRECT ANSWER-"wonderful maze" specialized arterial
structures where an incurrent artery gives rise to numerous branching and
anatomizing vessels that will be drained by a second (excurrent) artery (ex.
glomeruli, temperature in sharks)
Diving Physiology - CORRECT ANSWER-oxygen stores = lungs + muscle +
blood
Mammalian Dive Response - CORRECT ANSWER-bradycardia = heart rate
slows
select ischemia = blood flow to vital organs
hypometabolism = lower O2 consumption rate
COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED
