BIOL 204
biol 204 exam 2 practice questions and
answers 2026-2027
1
T/F: The first and second lines of defense are considered nonspecific resistance while
the third line of defense is considered adaptive immunity.
true
2
The ability to ward off a specific infection or disease, usually as a result of prior
exposure and the body's production of antibodies or lymphocytes against one
pathogen, is called __________.
adaptive immunity
3
If a person is sick with the common cold on May 1st, gets well, and then memory cells
are exposed to the same virus on May 31st, what would the person's symptoms most
likely be?
No symptoms at all
4
When the oil urushiol from the poison ivy plant is absorbed through the skin, it
oxidizes and forms a substance called quinone. Quinone reacts with skin proteins
creating a complex that now triggers an immune response. Quinone is an example of
a(n) __________.
hapten
explanation: Haptens are too small to be antigenic themselves, but they can stimulate
an immune response by binding to a macromolecule and creating a complex that the
body recognizes as foreign.
BIOL 204
, BIOL 204
5
Helper T (TH) cells do not __________.
secrete fever-producing chemicals
They CAN:
-secrete cytokines that stimulate macrophage activity
-secrete cytokines that stimulate clonal selection of B cells
-secrete inflammatory chemicals
6
Cytotoxic T (TC) cells are like natural killer (NK) cells because they both __________.
secrete granzymes and perforin
7
T/F: Mucous membranes prevent most pathogens from entering the body because of
the stickiness of the mucus and the presence of lysozymes.
true
8
T/F: The immune system spans nearly every organ and tissue in the human body.
true
9
A pyrogen is a substance that causes __________.
fever
BIOL 204
biol 204 exam 2 practice questions and
answers 2026-2027
1
T/F: The first and second lines of defense are considered nonspecific resistance while
the third line of defense is considered adaptive immunity.
true
2
The ability to ward off a specific infection or disease, usually as a result of prior
exposure and the body's production of antibodies or lymphocytes against one
pathogen, is called __________.
adaptive immunity
3
If a person is sick with the common cold on May 1st, gets well, and then memory cells
are exposed to the same virus on May 31st, what would the person's symptoms most
likely be?
No symptoms at all
4
When the oil urushiol from the poison ivy plant is absorbed through the skin, it
oxidizes and forms a substance called quinone. Quinone reacts with skin proteins
creating a complex that now triggers an immune response. Quinone is an example of
a(n) __________.
hapten
explanation: Haptens are too small to be antigenic themselves, but they can stimulate
an immune response by binding to a macromolecule and creating a complex that the
body recognizes as foreign.
BIOL 204
, BIOL 204
5
Helper T (TH) cells do not __________.
secrete fever-producing chemicals
They CAN:
-secrete cytokines that stimulate macrophage activity
-secrete cytokines that stimulate clonal selection of B cells
-secrete inflammatory chemicals
6
Cytotoxic T (TC) cells are like natural killer (NK) cells because they both __________.
secrete granzymes and perforin
7
T/F: Mucous membranes prevent most pathogens from entering the body because of
the stickiness of the mucus and the presence of lysozymes.
true
8
T/F: The immune system spans nearly every organ and tissue in the human body.
true
9
A pyrogen is a substance that causes __________.
fever
BIOL 204
