Phys Eco Exam 2 Section 4: Ectotherms & Physiological Function

What thermal ability characterizes ectotherms?

They can function over a wider range of body temperatures.

How do ectotherms regulate body temperature?

Behavioral thermoregulation plays an important role.

How does body temperature affect ectotherm metabolic rate?

Metabolic rate changes with body temperature.

What is acclimation?

Physiological adjustment to environmental changes.

How does acclimation affect metabolism?

It helps buffer the effects of changing ambient temperature on metabolic rate.

What physiological functions are influenced by body temperature?

Locomotion, enzymatic activity, and membrane fluidity.

What are homologs?

Genes between species that share an ancestral gene.

What are allozymes?

Different enzyme forms produced by different alleles at the same locus.

What are isozymes?

Enzymes with the same function produced by different loci within an individual.

What membrane property must be maintained at different temperatures?

Membrane fluidity.