GLY1102 Topic 30

question

Most ectotherms have sprawling postures
answer

True
question

Ectothermic animals maintain a body temperature at 36-40 degrees C.
answer

False
question

Endotherms require great motor and sensory control which is associated with larger and more complex brains.
answer

True
question

The density of blood vessels in bone is higher in all ectotherms than in endotherms.
answer

False
question

Mammals have a fully divided four-chambered heart and numerous fossil dinosaur hearts have only two chambers
answer

False
question

Today feathers are only found on endothermic birds.
answer

True
question

Dinosaurs have complex scrolls of thin bone within the nasal cavity (turbinates) once covered with mucous membranes.
answer

False
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Most endotherms are egg-layers.
answer

False
question

The optimum temperature of mammals is usually lower than those in the environment around them.
answer

False
question

Endotherms require more food per body weight than is the case for ectotherms.
answer

True
question

One dinosaur researcher, Dr. Bakker, finds the predator/herbivore dinosaur ratios similar to Cenozoic mammal (endothermic) populations and interpreted this as strong evidence for endothermy.
answer

True
question

Endothermic predator- prey ratios should be lower than for ectotherms.
answer

True
question

Most endotherms have an erect gait.
answer

True
question

Endotherms require high blood pressure and rapid blood circulation to allow against oxygen and energy to circulate quickly through the body.
answer

True
question

Ectothermic animals develop their heat from the external environment rather than metabolic sources.
answer

True
question

Endotherms must eat more food per body volume than ectotherms because of their higher level of activity.
answer

True
question

Growth rings occur in all living endotherms because of a seasonal pause in bone growth as food supplies are limited or climate unfavorable.
answer

False
question

Many dinosaurs have lamellar-zonal bone (growth rings), a common characteristic of living ectotherms with seasonal pauses in their growth.
answer

True
question

Large ectothermic dinosaurs would have more trouble maintaining a constant body temperature than smaller ones because of their large body volume.
answer

False
question

The rate of metabolic reactions depends on the internal body temperature.
answer

True

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