QUESTION II-2000
2. Feedback mechanisms are used by organisms to maintain the steady-state physiological condition known as homeostasis. Choose three of the following and for each, explain how feedback mechanisms maintain homeostasis.
a) Blood glucose concentration.
b) Calcium ion concentration in blood.
c) Body temperatures in mammals.
d) Osmolarity of the blood.
e) Pulse rate in mammals.
___________________________________________________________________________________________________
AP® BIOLOGY
1999 SCORING GUIDELINES
Question II
Maximum of 4 pts for each choice
a) blood glucose concentration
b) calcium ion concentration in blood
c) body temperature in mammals
d) osmolarity of the blood
e) pulse rate in mammals
Copyright © 2000 College Entrance Examination Board and Educational Testing Service. All rights reserved.
AP is a registered trademark of the College Entrance Examination Board.
b) Calcium ion concentration in blood.
c) Body temperatures in mammals.
d) Osmolarity of the blood.
e) Pulse rate in mammals.
___________________________________________________________________________________________________
AP® BIOLOGY
1999 SCORING GUIDELINES
Question II
Maximum of 4 pts for each choice
a) blood glucose concentration
b) calcium ion concentration in blood
c) body temperature in mammals
d) osmolarity of the blood
e) pulse rate in mammals
Copyright © 2000 College Entrance Examination Board and Educational Testing Service. All rights reserved.
AP is a registered trademark of the College Entrance Examination Board.
Copyright © 2000 College Entrance Examination Board and Educational Testing Service. All rights reserved.
AP is a registered trademark of the College Entrance Examination Board.