APHY 201 FINAL UPDATED ACTUAL QUESTIONS AND
CORRECT ANSWERS
Question:
1. How is autocrine regulation best described?
Answer:
chemical regulators affect the same cells that produce them
Question:
2. What is the term for the developmental process that
leads to specialized cell types?
Answer:
Differentiation
Question:
3. Body water is "compartmentalized". Find the false
statement below, if any, concerning body fluid
compartmentalization:
Answer:
Blood plasma accounts for about 80% of the extracellular fluid.
Question:
4. What term is used to describe the steady-state value for
any variable that the body attempts to maintain?
Answer:
set point
Question:
5. Which of the following situations best represents a
homeostatic mechanism?
Answer:
After eating a large batch of salty popcorn, levels of salt in the urine increase.
,Question:
6. A man takes a week-long vacation to the Rocky
Mountains. During the first few days, he experiences
altitude sickness, due to O2 deficiency (nausea,
headache, breathlessness). After that he feels fine, due to
his body's production of more red blood cells to carry
O2 to his cells. When he returns home, as the extra RBCs
become worn out and are removed from his blood, his
body returns to its normal number of RBCs and does not
replace the extra ones. This is an example of,
Answer:
Acclimatization
Question:
7. Which of the following is an example of an acquired
reflex?
Answer:
Swerving while driving a car, to avoid hitting another car.
Question:
8. Which one of the following is the correct sequence for a
regulatory reflex arc?
Answer:
Stimulus, receptor, afferent pathway, integrating center, efferent pathway, effector
Question:
9. What is the general purpose of positive feedback
mechanisms?
Answer:
To bring about a rapid change in the body
Question:
10. Interleukins are immune substances secreted by certain
types of lymphocytes. Once secreted, some of them
exert their effects on cells close to those that secreted
them. These interleukins are examples of ______ agents or
messengers.
Answer:
Paracrine
, Question:
11. What best describes the main determinant of the
secondary structure of a protein?
Answer:
Molecular interactions along a polypeptide chain that fold various regions into
alpha helices or beta sheets
Question:
12. A single genetic mutation will change a protein at what
level of structure?
Answer:
A single genetic mutation could change all of these.
Question:
13. You're designing a new drug to treat allergies. You'd like
for your therapy to be able to dissolve through the lipid
bilayers of cell membranes; therefore, ________ molecules
will make excellent drug choices.
Answer:
non-polar
Question:
14. Find the false statement below, if any, concerning
proteins:
Answer:
There is no false statement; all are true of proteins.
Question:
15. Molecules that have properties of both polar and
nonpolar molecules are called
Answer:
amphipathic
Question:
16. Carbohydrates are stored in animal cells in the form of
Answer:
glycogen
CORRECT ANSWERS
Question:
1. How is autocrine regulation best described?
Answer:
chemical regulators affect the same cells that produce them
Question:
2. What is the term for the developmental process that
leads to specialized cell types?
Answer:
Differentiation
Question:
3. Body water is "compartmentalized". Find the false
statement below, if any, concerning body fluid
compartmentalization:
Answer:
Blood plasma accounts for about 80% of the extracellular fluid.
Question:
4. What term is used to describe the steady-state value for
any variable that the body attempts to maintain?
Answer:
set point
Question:
5. Which of the following situations best represents a
homeostatic mechanism?
Answer:
After eating a large batch of salty popcorn, levels of salt in the urine increase.
,Question:
6. A man takes a week-long vacation to the Rocky
Mountains. During the first few days, he experiences
altitude sickness, due to O2 deficiency (nausea,
headache, breathlessness). After that he feels fine, due to
his body's production of more red blood cells to carry
O2 to his cells. When he returns home, as the extra RBCs
become worn out and are removed from his blood, his
body returns to its normal number of RBCs and does not
replace the extra ones. This is an example of,
Answer:
Acclimatization
Question:
7. Which of the following is an example of an acquired
reflex?
Answer:
Swerving while driving a car, to avoid hitting another car.
Question:
8. Which one of the following is the correct sequence for a
regulatory reflex arc?
Answer:
Stimulus, receptor, afferent pathway, integrating center, efferent pathway, effector
Question:
9. What is the general purpose of positive feedback
mechanisms?
Answer:
To bring about a rapid change in the body
Question:
10. Interleukins are immune substances secreted by certain
types of lymphocytes. Once secreted, some of them
exert their effects on cells close to those that secreted
them. These interleukins are examples of ______ agents or
messengers.
Answer:
Paracrine
, Question:
11. What best describes the main determinant of the
secondary structure of a protein?
Answer:
Molecular interactions along a polypeptide chain that fold various regions into
alpha helices or beta sheets
Question:
12. A single genetic mutation will change a protein at what
level of structure?
Answer:
A single genetic mutation could change all of these.
Question:
13. You're designing a new drug to treat allergies. You'd like
for your therapy to be able to dissolve through the lipid
bilayers of cell membranes; therefore, ________ molecules
will make excellent drug choices.
Answer:
non-polar
Question:
14. Find the false statement below, if any, concerning
proteins:
Answer:
There is no false statement; all are true of proteins.
Question:
15. Molecules that have properties of both polar and
nonpolar molecules are called
Answer:
amphipathic
Question:
16. Carbohydrates are stored in animal cells in the form of
Answer:
glycogen
