What is innate immunity?
Your Answer:
Also called natural immunity. It is the first line of defense and is in place before an
infection takes place and
... [Show More] can function immediately. It is comprised of physical, chemical,
cellular, and molecular defenses.
Innate immunity, also called natural immunity, is the firstline of defense. This
type of defense is in place before an infection takes place and can function
immediately. Itis comprised of physical, chemical, cellular, and molecular
defenses.
Question 2
0 / 0 pts
How does the skin act as a physical barrier?
Your Answer:
The skin's design makes it a strong physical barrier. It has closely packed cells in multiple
layer that are continuously being shed. Keratin covers the skin, which creates a salty acidic
environment inhospitable to microbes. The skin also contains antimicrobial proteins and
lysozymes that inhibit microorganisms and help to destroy them.
The skin’s design makes it a strong physical barrier. It has closely packed cells in
multiple layers that are continuously being shed. Keratin covers the skin, which
creates a salty, acidic environmentinhospitable to microbes. It also contains
antimicrobial proteins and lysozymes thatinhibit microorganisms and help to
destroy them.
Question 3
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What cells are involved in innate immunity?
Your Answer:
Neutrophils, macrophages, dendritic cells, natural killer cells, and intraepithelial
lymphocytes.
The cells responsible for this response include neutrophils, macrophages,
dendritic cells (DC), natural killer (NK) cells, and intraepithelial lymphocytes.
Question 4
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Describe each type of leukocyte and explain their function:
Your Answer:
Neutrophils: an early responder in innate immunity and use phagocytosis to kill microbes.
Eosinophils are active in parasitic infections and allergic responses.
Basophils release histamine and proteolytic enzymes.
Monocytes are the largest in size and are released from the bone marrow and mature into
macrophages and dendritic cells where they engage in the inflammatory response and
phagocytize foreign substances and cellular debris.
Macrophages have a long life span, reside in the tissues, and are the first phagocyte that
organisms encounter. Neutrophils and macrophages work together on behalf of the host's
initial defense system.
Neutrophils are the most abundantin the body and are an early responder in
innate immunity and use phagocytosis to kill microbes. Eosinophils are active in
parasitic infections and allergic responses. Basophils release histamine and
proteolytic enzymes. Monocytes are the largestin size and are released from
the bone marrow and mature into macrophages and dendritic cells where they
engage in the inflammatory response and phagocytize foreign substances and
cellular debris. Macrophages have a long life span, reside in the tissues, and are
the first phagocyte that organisms encounter. Neutrophils and macrophages
work together on behalf ofthe host’s initial defense system [Show Less]