BIO 207 - EXAM 1 STUDY GUIDE QUESTIONS AND
VERIFIED ANSWERS; 100% CORRECT; GRADE A
A change in the base pair sequence of the coding region DNA to a
change in amino acid sequence of polypeptide causes a change in
phenotype. - correct answer- Mutation
A compensatory adjustment that reduces the difference in value
between the regulated physiological variable state and its physiological
setpoint value is termed negative feedback . - correct answer-
negative feedback
A decrease in the absolute value of a membrane potential such that it
tends toward 0 (becomes less negative or even positive) is termed a: -
correct answer- Depolarization
A genetically controlled trait that, through the process of natural
selection, has come to be present at high frequency in a population
because it confers a greater probability of survival and successful
reproduction in the prevailing environment. - correct answer-
Adaptation
A hormone that travels in the hypothalamohypophyseal portal system to
its target cell in the adenohypophysis is ___. - correct answer- TRH
, A low insulin : glucagon (I:G) ratio favors increased plasma glucose level
- correct answer- True
A physiological challenge to homeostasis in an organism includes: -
correct answer- Body size and multicellularity, varying environmental
conditions, variable activity levels
A relatively constant internal environment of a cell or an organism is
____. - correct answer- homeostasis
A state in which an animals internal conditions match the external
environmental conditions. - correct answer- Conformity
A system that sets the level of a particular variable that is being
controlled. It uses information from sensors to determine signals it sends
to the effectors that can modify the controlled variable. - correct
answer- Control Systems
A type of phenotypic plasticity in which a chronic response of an
individual to a entirely new environment, such as when seasons change
or migrate to high altitude, is best termed acclimatization. - correct
answer- True
Acclimatization" refers to physiological adjustment to a range of
variables under natural conditions. - correct answer- True
VERIFIED ANSWERS; 100% CORRECT; GRADE A
A change in the base pair sequence of the coding region DNA to a
change in amino acid sequence of polypeptide causes a change in
phenotype. - correct answer- Mutation
A compensatory adjustment that reduces the difference in value
between the regulated physiological variable state and its physiological
setpoint value is termed negative feedback . - correct answer-
negative feedback
A decrease in the absolute value of a membrane potential such that it
tends toward 0 (becomes less negative or even positive) is termed a: -
correct answer- Depolarization
A genetically controlled trait that, through the process of natural
selection, has come to be present at high frequency in a population
because it confers a greater probability of survival and successful
reproduction in the prevailing environment. - correct answer-
Adaptation
A hormone that travels in the hypothalamohypophyseal portal system to
its target cell in the adenohypophysis is ___. - correct answer- TRH
, A low insulin : glucagon (I:G) ratio favors increased plasma glucose level
- correct answer- True
A physiological challenge to homeostasis in an organism includes: -
correct answer- Body size and multicellularity, varying environmental
conditions, variable activity levels
A relatively constant internal environment of a cell or an organism is
____. - correct answer- homeostasis
A state in which an animals internal conditions match the external
environmental conditions. - correct answer- Conformity
A system that sets the level of a particular variable that is being
controlled. It uses information from sensors to determine signals it sends
to the effectors that can modify the controlled variable. - correct
answer- Control Systems
A type of phenotypic plasticity in which a chronic response of an
individual to a entirely new environment, such as when seasons change
or migrate to high altitude, is best termed acclimatization. - correct
answer- True
Acclimatization" refers to physiological adjustment to a range of
variables under natural conditions. - correct answer- True
