PHM 450 Exam 3 with all Correct & 100% Verified
Answers |Latest Version |Already Graded A+
Primary Lymphoid Organs ✔Correct Answer-bone marrow and thymus (contains lymphoid
progenitor cells)
Secondary Lymphoid Organs ✔Correct Answer-spleen and lymph nodes (role in lymphocyte
homing, antigen presentation and acquired immune response)
Considered to be the central lymphoid tissue ✔Correct Answer-bone marrow and thymus
Considered to be the peripheral lymphoid tissue ✔Correct Answer-spleen, lymph nodes,
tonsils, adenoids, appendix, Peyer's patches
Where is blood filtered? ✔Correct Answer-lymph, spleen, lymph nodes
Are responsible for trapping inhaled particles ✔Correct Answer-tonsils and adenoids
responsible for trapping ingested particles ✔Correct Answer-Peyer's Patch, appendix
Immune system cells arise from what ✔Correct Answer-pluripotent stem cells (located in
bone marrow)
type of stem cell that can turn into any cell in the body ✔Correct Answer-totipotent
in the immune system, cells will commit to either the _______ or ______ lineages ✔Correct
Answer-lymphoid or myeloid
cells of lymphoid lineage will further develop into _______ while myeloid cells are all of the
remaining immune cells as well as platelets ✔Correct Answer-B and T cells
True or False: platelets are not considered to be cells, but rather "Formed elements"
✔Correct Answer-true (because they are derived from a type of cell called megakaryocytes)
we refer to cells and cell fragments in the blood as being what? this includes RBCs, WBCs, and
platelets ✔Correct Answer-formed elements
_______ Develop into large phagocytes called macrophages which engulf particles like bacteria
and cellular debris ✔Correct Answer-monocytes
monocytes make up approximately ____% of the total leukocyte population ✔Correct
Answer-5
, neutrophils make up ___% of the leukocytes in the blood and are responsible for secretion of
cytokines as part of their normal function ✔Correct Answer-60-80%
Eosinophils make up less than ____% of the leukocyte population, and they are in charge of
secreting enzymes that kill parasites and defend against parasitic invaders ✔Correct Answer-2
Basophils are less that 1% of the leukocyte population and they are _______ - instead they
release toxic substances that defend against invaders including histamine and heparin
(contribute to allergic reactions) ✔Correct Answer-non-phagocytic
what are the 3 kinds of lymphocytes ✔Correct Answer-b cells, t cells, null cells
_____ cells are associated with antibody production and secretion (when it comes into contact
with an antigen it develops into a mature form called a plasma cell) ✔Correct Answer-B Cell
_________ mark invaders for destruction, while ______ act indirectly by secreting antibodies
✔Correct Answer-antibodies; B cells
_______ will contact infected, mutated, or transplanted cells and develop into cytotoxic cells
that destroy the target cell ✔Correct Answer-T cells
When a T cell destroys another cell, it secretes products that form pores in the target cell
membrane, causing the target cell to ____ ✔Correct Answer-lyse
_____ cells are important in defending against viral infections- they attack virus infected cells
causing lysis (fast response, active early in the immune response) ✔Correct Answer-NK
What are the 2 broad categories for immunity ✔Correct Answer-nonspecific defenses (innate
immunity); acquired immunity
The innate immunity includes: ✔Correct Answer-humoral: physical barriers, complement
system, fever, inflammation
cellular: interferons, NK cells, phagocytosis
the _______ immune system is the body's first line of defense against invaders ✔Correct
Answer-innate
the _____ immune system has NO memory so it serves as a nonspecific protection against
potential pathogens ✔Correct Answer-innate
a set of plasma proteins that work together to destroy the cell membranes by causing lysis
(attract phagocytes and stimulate activity of other immune system cells)- usually inactive, but
Answers |Latest Version |Already Graded A+
Primary Lymphoid Organs ✔Correct Answer-bone marrow and thymus (contains lymphoid
progenitor cells)
Secondary Lymphoid Organs ✔Correct Answer-spleen and lymph nodes (role in lymphocyte
homing, antigen presentation and acquired immune response)
Considered to be the central lymphoid tissue ✔Correct Answer-bone marrow and thymus
Considered to be the peripheral lymphoid tissue ✔Correct Answer-spleen, lymph nodes,
tonsils, adenoids, appendix, Peyer's patches
Where is blood filtered? ✔Correct Answer-lymph, spleen, lymph nodes
Are responsible for trapping inhaled particles ✔Correct Answer-tonsils and adenoids
responsible for trapping ingested particles ✔Correct Answer-Peyer's Patch, appendix
Immune system cells arise from what ✔Correct Answer-pluripotent stem cells (located in
bone marrow)
type of stem cell that can turn into any cell in the body ✔Correct Answer-totipotent
in the immune system, cells will commit to either the _______ or ______ lineages ✔Correct
Answer-lymphoid or myeloid
cells of lymphoid lineage will further develop into _______ while myeloid cells are all of the
remaining immune cells as well as platelets ✔Correct Answer-B and T cells
True or False: platelets are not considered to be cells, but rather "Formed elements"
✔Correct Answer-true (because they are derived from a type of cell called megakaryocytes)
we refer to cells and cell fragments in the blood as being what? this includes RBCs, WBCs, and
platelets ✔Correct Answer-formed elements
_______ Develop into large phagocytes called macrophages which engulf particles like bacteria
and cellular debris ✔Correct Answer-monocytes
monocytes make up approximately ____% of the total leukocyte population ✔Correct
Answer-5
, neutrophils make up ___% of the leukocytes in the blood and are responsible for secretion of
cytokines as part of their normal function ✔Correct Answer-60-80%
Eosinophils make up less than ____% of the leukocyte population, and they are in charge of
secreting enzymes that kill parasites and defend against parasitic invaders ✔Correct Answer-2
Basophils are less that 1% of the leukocyte population and they are _______ - instead they
release toxic substances that defend against invaders including histamine and heparin
(contribute to allergic reactions) ✔Correct Answer-non-phagocytic
what are the 3 kinds of lymphocytes ✔Correct Answer-b cells, t cells, null cells
_____ cells are associated with antibody production and secretion (when it comes into contact
with an antigen it develops into a mature form called a plasma cell) ✔Correct Answer-B Cell
_________ mark invaders for destruction, while ______ act indirectly by secreting antibodies
✔Correct Answer-antibodies; B cells
_______ will contact infected, mutated, or transplanted cells and develop into cytotoxic cells
that destroy the target cell ✔Correct Answer-T cells
When a T cell destroys another cell, it secretes products that form pores in the target cell
membrane, causing the target cell to ____ ✔Correct Answer-lyse
_____ cells are important in defending against viral infections- they attack virus infected cells
causing lysis (fast response, active early in the immune response) ✔Correct Answer-NK
What are the 2 broad categories for immunity ✔Correct Answer-nonspecific defenses (innate
immunity); acquired immunity
The innate immunity includes: ✔Correct Answer-humoral: physical barriers, complement
system, fever, inflammation
cellular: interferons, NK cells, phagocytosis
the _______ immune system is the body's first line of defense against invaders ✔Correct
Answer-innate
the _____ immune system has NO memory so it serves as a nonspecific protection against
potential pathogens ✔Correct Answer-innate
a set of plasma proteins that work together to destroy the cell membranes by causing lysis
(attract phagocytes and stimulate activity of other immune system cells)- usually inactive, but
