lecture 18 - metabolism and metabolic rates Flashcards
energy budgets characterize what
uptake and use of energy
energy budgets are about
resource allocation
organisms must acquire energy from what and allocate it how
from their environmemt and allocate it to various life processes
factors that infleunce energy requirements of animal
-environment
-activity
-how body temp is regulated
-size
-age
-sex
cellular metabolism
sum of all chem rxns occurring in a cell
whole organism metabolism
sum of all chem rxns occurring in the body of an organism
metabolic rate is
total amount of energy used by an organism in a given time interval (hour/day/etc)
when energy is used it is converted to
other forms
-much of the energy is lost as heat
how is energy measred
in calories or Joules
metabolic rate determines
hoe much food animal needs
metabolic rate is the quantitative measure of
an animals total physiological activity (intensity of living)
ways to measure metabolic rate
-CO2 production
-O2 consumption
-heat production
instruments to measure metabolic rate
-CO2 meter
-respirometer (O2)
-calorimeters (heat production)
basal metabolic rate
metabolic rate of an endotherm at rest at a comftorable temo
standard metabolic rate
metabolic rate of an ecotherm at rest at a soecific temp
