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BIO 103
BIO 103 - Module 3 Exam Questions with
Correct Verified Answers Latest Update
(2025/2026) Guaranteed Pass
Homeostasis is a ___ equilibrium - ANS ✓dynamic
the interplay between external factors that tend to change the internal
environment and internal control mechanisms that oppose such changes
responses to stimuli are not instantaneous, therefore ___ - ANS
✓homeostasis moderates but doesn't eliminate changes in the internal
environment
Positive feedbacks loops in animals - ANS ✓don't play a major role in
homeostasis, but instead help us drive processes to completion
Example of positive feedback loop in animals - ANS ✓during birth the
pressure of baby's head against receptors near the opening of the
mother's uterus stimulates the uterus to contract. The contractions result
in greater pressure against opening of uterus, until baby is born
BIO 103
, 2
BIO 103
what are some regulatory changes associated with? - ANS ✓Stage in
life (ex. hormone changes in puberty) or some may be cyclic (ex.
variation in hormones during menstrual cycle)
In all animals (&plants) certain cyclic alterations may reflect a ___ - ANS
✓circadian rhythm
Circadian rhythm - ANS ✓Set of physiological changed that occur
roughly every 24 hours
A circadian rhythm is ____ to the body - ANS ✓intrinsic
-biological clock maintains rhythm even when variations in human
activity, room temp, and light levels are minimized
-although biological clock is normally coordinated with light and dark in
the environment
What resets the clock - ANS ✓external stimuli, but the effect is not
immediate
(why you get jet lagged - mismatch in circadian rhythm and environment)
Acclimation - ANS ✓Physiological adjustment to a change in a single
environmental factor
BIO 103
, 3
BIO 103
Acclimatization - ANS ✓Physiological adjustment to changes in a
complex environment
Acclimation and acclimatization are ___ changes - ANS ✓temporary
Thermoregulation - ANS ✓Process by which animals maintain an
internal temperature within a tolerable range. This is critical to survival
because most biochemical and physiological processes are very
sensitive to changes in body temp
Ectotherm - ANS ✓an animal that utilizes an ectothermic strategy to
determine body temp
-body temp is mainly determined by external conditions
-they produce heat in metabolism, but not enough to elevate body temp
above that imposed by environment
Endotherm - ANS ✓animal that uses internal metabolic processes as a
major heat source
-can gain heat from environment but metabolic heat is most important in
their thermoregulation
BIO 103
BIO 103
BIO 103 - Module 3 Exam Questions with
Correct Verified Answers Latest Update
(2025/2026) Guaranteed Pass
Homeostasis is a ___ equilibrium - ANS ✓dynamic
the interplay between external factors that tend to change the internal
environment and internal control mechanisms that oppose such changes
responses to stimuli are not instantaneous, therefore ___ - ANS
✓homeostasis moderates but doesn't eliminate changes in the internal
environment
Positive feedbacks loops in animals - ANS ✓don't play a major role in
homeostasis, but instead help us drive processes to completion
Example of positive feedback loop in animals - ANS ✓during birth the
pressure of baby's head against receptors near the opening of the
mother's uterus stimulates the uterus to contract. The contractions result
in greater pressure against opening of uterus, until baby is born
BIO 103
, 2
BIO 103
what are some regulatory changes associated with? - ANS ✓Stage in
life (ex. hormone changes in puberty) or some may be cyclic (ex.
variation in hormones during menstrual cycle)
In all animals (&plants) certain cyclic alterations may reflect a ___ - ANS
✓circadian rhythm
Circadian rhythm - ANS ✓Set of physiological changed that occur
roughly every 24 hours
A circadian rhythm is ____ to the body - ANS ✓intrinsic
-biological clock maintains rhythm even when variations in human
activity, room temp, and light levels are minimized
-although biological clock is normally coordinated with light and dark in
the environment
What resets the clock - ANS ✓external stimuli, but the effect is not
immediate
(why you get jet lagged - mismatch in circadian rhythm and environment)
Acclimation - ANS ✓Physiological adjustment to a change in a single
environmental factor
BIO 103
, 3
BIO 103
Acclimatization - ANS ✓Physiological adjustment to changes in a
complex environment
Acclimation and acclimatization are ___ changes - ANS ✓temporary
Thermoregulation - ANS ✓Process by which animals maintain an
internal temperature within a tolerable range. This is critical to survival
because most biochemical and physiological processes are very
sensitive to changes in body temp
Ectotherm - ANS ✓an animal that utilizes an ectothermic strategy to
determine body temp
-body temp is mainly determined by external conditions
-they produce heat in metabolism, but not enough to elevate body temp
above that imposed by environment
Endotherm - ANS ✓animal that uses internal metabolic processes as a
major heat source
-can gain heat from environment but metabolic heat is most important in
their thermoregulation
BIO 103
