termonology: lab 3

Question 1

ectotherms

Answer 1

regulate their body temperatures using heat
from the outside environment.
the body temperature of an ectotherm depends on the temperature of its environment.
The ectotherm can adjust its body temperature by moving to different locations.

Question 2

endotherms

Answer 2

regulate their body temperatures using heat
generated inside their bodies.
An
endotherm uses its internal heat to keep its body temperature stable, even when temperatures
in its environment are changing.

Answer 3

Both ectotherms and endotherms generate some heat by breaking down food. Food is broken
down by cellular respiration to produce cellular energy in the form of ATP. ATP is used for all
types of biological “work,” such as growth, movement, and reproduction. During cellular
respiration, some of the chemical energy from food is also converted into heat.

Question 4

advantage of endotherms

Answer 4

Since endotherms tend to have higher metabolic rates than ectotherms, they are generally
more active, grow and reproduce faster, and thrive over a wide range of temperatures.
However, endotherms must also eat much more often and are more likely to run out of food. A
shrew (a small endotherm similar to a mouse) may starve to death in a day without food.

Question 5

how does ecto/endotherms generate heat other than atp