BIO 400 - Exam 1 Questions and Answers 100% PASS

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BIO 400 - Exam 1 Questions and Answers 100% PASS

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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

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