Exam 2

Question 1

1 best diver

Answer 1

Sperm whales

2 hours, 3000 meters

Question 2

2 best diver

Answer 2

Beaked whales

2 hours, 2000 meters

Question 3

3 best diver

Answer 3

Elephant Seal

2 hours, 2000 meters

Question 4

4 best diver

Answer 4

Weddell Seal

80 min, 600 meters

Question 5

What percent of lung capacity do humans use?

Answer 5

10%

Question 6

What percent of lung capacity do cetaceans use? and list reasons how?

Answer 6

80-90%

• Collapsible rib cage
• Long elastic lung tissue
• Oblique angle diaphram
• -Rich capillary network

Question 7

How many liters can a blue whale blow out in 1-2 sec?

Answer 7

2,000L

Question 8

Most marine mammals are close to the mouse-elephant curve, which ones are NOT?

Answer 8

Sea Otters: resting metabolism is 2-3X and eat 20-25% of their body weight daily.
Harbor porpoise: Elevated metabolism
Manatee: very low metabolism

Question 9

4 osmotic solutions

Answer 9

1. More efficient kidneys
2. Gets H2O from food
   - piscovore vs. invertebrate/herbivore
3. Retains H2O
   - Concentrated urine, feces, milk
4. Metabolic water
   - Water stored in fats/lipids

Question 10

What is the hearing bone in cetaceans?

Answer 10

Tympano periotic complex

Question 11

What is the 3 parts of terrestrial mammal ears?

Answer 11

Outer, middle, and inner ear

Question 12

What is in the outer ear of a dolphin?

Answer 12

Acoustic fats, hollow jaws

Question 13

Mammalian dive response

Answer 13

Periferal vasoconstriction

Bradiocardia

Question 14

Tachycardia

Answer 14

Elevate heart rate

Question 15

Frequency of a peak

Answer 15

7 kHz

Question 16

What is blubber?

Answer 16

Fibrous connective tissue, made of fats and lipids