2. Which kind of cell engulfs and eats bacteria?
(1.) red blood cell
(2.) phagocyte (3.)
lymphocyte (4.) platelet
3. The main function of the human digestive system is to
(1.) rid the body
of cellular waste materials
(2.) process organic molecules so they
can enter cells (3.) break down
glucose in order to release energy
(4.) change amino acids into proteins and
carbohydrates
4. Which statement describes the best procedure to determine
if a
vaccine for a disease in a certain bird
species is effective?
(1.) Vaccinate 50 birds, do not vaccinate
50 other birds, and expose
all 100 to the disease.
(2.) Vaccinate 50 birds, do not vaccinate
50 other birds, and expose only the
vaccinated birds to the disease.
(3.) Vaccinate 100 birds and expose
all 100 to the disease.
(4.) Vaccinate 100 birds and expose
only 50 of them to the disease.
5. Identify the control group in question # 4.
6. Identify the independent variable in question # 4.
7. Identify the dependent variable in question # 4.
8. The normal sodium level in human blood is 135 mEq/L. If a blood
test
taken immediately after a meal reveals
a sodium level of 150 mEq/L,
what will most likely result?
(1.) Antibody production will increase.
(2. ) An adjustment within the human
body will be made
to restore homeostasis. (3.) The
person will move to an ecosystem with
a lower sodium level. (4.)
The nutritional relationships between
humans and other organisms will change.
9. The energy an organism requires to transport materials and
eliminate wastes is obtained directly
from (1.) DNA (2.) hormones
(3.) starch (4.) ATP
10. Which disease destroys the human immune system, leaving the
body
open to certain infectious agents?
(1.) flu (2.) chicken pox (3.) AIDS
(4.) pneumonia
11. A characteristic shared by all enzymes, hormones, and
antibodies is
that their function is determined
by the (1.) shape of their molecules
(2.) DNA they contain
(3.) inorganic molecules they contain
(4.) organelles present
in their structure
12. What usually results when an organism fails to maintain
homeostasis?
(1.) Growth rates within
organs become equal. (2.) The
organism becomes ill
or may die. (3.) A constant sugar supply for
the cells is produced.
(4.) The water balance in the tissues of
the organism stabilizes.
13. Which activity is not a response of human white blood
cells
to pathogens? (1)
engulfing and destroying bacteria
(2.) producing antibodies
(3.) identifying invaders for destruction
(4.) removing carbon dioxide
14. The movement of materials from lower to higher concentration
requiring energy in the
form of ATP is called (1.) movement
(2.) diffusion (3.)
active transport (4.) cell division
15. Explain the difference between the dependent and independent
variables
in an experiment in
one or more sentences.
16. One similarity between cell receptors and antibodies is that
both
(1.) are produced by nerve cells
(2.) are highly specific in their actions
(3.) slow the rate of chemical
reactions (4.) are involved in digestion
17. In some individuals, the immune system attacks substances
such
as grass pollen that are usually
harmless, resulting in (1.) a mutation
(2.) an allergic reaction
(2.) a form of cancer (4.) an insulin imbalance
18. Which blood cell type produces a chemical used in the immune
response? (1.) phagocytes
(2.) platelets (3.) lymphocytes
(4.) red blood cells
19. What is that chemical that this blood cell type in number
18 produces
called?
20. Diagrams, tables, and graphs are used by scientists mainly
to
(1.) design a research plan for
an experiment
(2.) test a hypothesis
(3.) organize data
(4.) predict the independent variable
21. If a human system fails to function properly, what is the
most
likely result? (1.) a stable
rate of metabolism
(2.) a disturbance in homeostasis
(3.) a change in the method of
cellular respiration
(4.) a change in the function
of DNA
22. Which statement regarding the functioning of the cell membrane
of
all organisms is not correct?
(1.) The cell membrane forms a
barrier that keeps all substances
that might harm the cell from
entering the cell.
(2.) The cell membrane forms a
boundary that separates the cellular
contents from the outside
environment. (3.)
The cell membrane is capable of receiving
and recognizing chemical signals.
(4.) The cell membrane controls
the movement of molecules into
and out of the cell.
23. In multicellular organisms, cells must be able to communicate
with
each other.
Structures that enable most cells to communicate with
each other are known as
(1.) receptor molecules
(2.) pathogenic agents (3.)
antibiotics (4.) chloroplasts
24. Every single-celled organism is able to survive because
it carries out
(1.) metabolic activities
(2.) autotrophic nutrition
(3.) heterotrophic nutrition
(4.) sexual reproduction
25. Which statement does not identify a characteristic of antibodies?
(1.) They are produced by the
body in response to the presence of
foreign substances. (2.)
They may be produced in response to an
antigen. (3.) They are nonspecific,
acting against any foreign substance in
the body. (4) They
may be produced by white blood cells.
26. An increase in the level of insulin in the blood would most
directly
result in (1.) a decrease
in the amount of glucose in the blood
(2.) a decrease in the amount
of protein in the blood
(3.) an increase in the amount
of fat in cells
(4.) an increase in the amount
of carbon dioxide in cells
27. State two ways the hormone insulin lowers the blood sugar level.
28. Choose any three of the cell organelles listed below and associate
it with a human organ with
a similar function. Explain why you made
your choice.
29. The most immediate response to
a high level of blood sugar in a human is an increase in the
(1) muscle activity in the arms (2) blood flow to the digestive tract (3)
activity of all cell organelles
(4) release of insulin
30. Which activity would stimulate the human immune system to provide
protection against an invasion by a microbe?
(1) receiving antibiotic injections after surgery (2) choosing a well-balanced
diet and following it throughout life
(3) being vaccinated against chicken pox (4) receiving hormones contained in
mother’s milk while nursing
31. Certain microbes, foreign
tissues, and some cancerous cells can cause immune responses in
the human body because all three contain (1) antigens (2) fats (3) enzymes (4)
cytoplasm
32. In heterotrophs, energy for the life processes comes from the chemical
energy stored in the
bonds of (1) water molecules (2) oxygen molecules (3) organic compounds (4)
inorganic compounds
33. A
researcher needs information on antigen–antibody reactions. Searching for which
phrase would best lead the researcher to information about these reactions? (1)
protein synthesis
(2) energy sources in nature (3) white blood cell activity (4) DNA replication
34. Which process is directly used
by autotrophs to store energy in glucose?
(1) diffusion (2) respiration (3) photosynthesis (4) active transport
35. A slide of human blood cells was
observed in focus under the low-power objective of a compound light microscope
that had clean lenses. When the microscope was switched to high power, the image
was dark and fuzzy.
Which parts of the microscope should be used to correct this situation? (1)
nosepiece and coarse adjustment
(2) diaphragm and ocular (3) objective and fine adjustment (4) diaphragm
and fine adjustment
36. Arrow
A represents active transport. State two ways that active transport is
different from diffusion.
37. In
cells of multicellular organisms, structure B often contains molecules involved
in cell communication. What specific term is used to identify these
molecules? ]
38.
Identify a piece of laboratory equipment that normally would be used to
accurately measure 15 milliliters of glucose solution for an
experiment.
Some hopefully correct
answers to this practice activity
Send any comments to jbuckley@ekcsk12.org