Crash Course A&P Immune System Part 1

Crash Course A&P Immune System

Part 1

Watch the video clips, then answer the questions.

Multiple Choice

You are covered in bacteria that are intent on using you to further their cause.

• True

• False

Multiple Choice

The immune system refers to a specific organ or tissues.

• True

• False

Fill in the Blanks

Your first line of defense is your

immune system. It uses an arsenal of physical and chemical barriers, killer cells, and even fever, to keep you healthy.

Multiple Choice

Your body’s very first line of defense is a simple, physical barrier: your __.

• skin

• nose

• mouth

• eyes

Fill in the Blanks

Your

membranes line any cavity that comes in contact with the outside world, including the respiratory, urinary, digestive, and reproductive tracts.

Multiple Choice

When the internal innate defenses take over, this is where your body calls up maneuvers like a ___, chemical defenses, or inflammation

• fever

• cold sweat

• chill

• shiver

Multiple Choice

Some of the first defensive cells on the scene are phagocytes, whose name literally means “to ___”.

• kill

• eat

• drink

• move

Multiple Choice

__ are the most abundant of your white blood and breakdown after they devour a pathogen and become pus.

• phagocytes

• neutrophils

• macrophages

• red blood cells

Multiple Choice

Others are ___ that come from white blood cells that have moved out of the blood stream into tissues. Some are free types (float around looking for bad stuff) and others are fixed (stay in on spot).

• phagocytes

• neutrophils

• macrophages

• red blood cells

Fill in the Blanks

Other cells, called ___ ___ cells, patrol your blood and lymph looking for pathogens and are unique because they can kill your own cells if they are infected with viruses or have become cancerous

Multiple Choice

A normal healthy human cell has a protein on its surface called MHC1. An infected one doesn’t have this. Natural killer cells detect this, poke the cell with an enzyme, and trigger ___ (programmed cell death).

• apoptosis

• mitosis

• photosynthesis

• spermatogenesis

Multiple Choice

When an accident happens, your immune system cues up your internal fire alarm: your ___ response. Instead of sirens it uses chemicals to get the message out and instead of smoke or fire you sense redness, swelling, heat, and pain.

• inflammatory

• innate

• natural killer

• phagocyte

Multiple Choice

Leukocytosis is the release of ___ from the bone marrow to the injury site.

• neutrophils

• phagocytes

• macrophages

• bacteria

Fill in the Blanks

Another name for the adaptive immune system is the

immune system.

Multiple Choice

You are born with a working adaptive immune system.

• True

• False

Multiple Choice

The ability to remember specific ___ is one of the key differences between the adaptive and innate defenses.

• pathogens

• phagocytes

• macrophages

• white blood cells

Fill in the Blanks

Your adaptive defenses can work all over your body at once. It does this by using its

immunity and cellular defenses.

Fill in the Blanks

Your humoral immunity works by employing important proteins called

Multiple Choice

In case of your immune system, it’s important to be able to identify ___: large signaling molecules not normally found in the body.

• antigens

• antibodies

• phagocytes

• killer cells

Multiple Choice

One of the stars of your humoral response, ___ are made in your bone marrow and mature there.

• B Lymphocytes

• natural killer cells

• T cells

• phagocytes

Multiple Choice

B cells are not activated until they find their perfect enemy match. Once they are activated they immediately start to ___ themselves.

• clone

• kill

Fill in the Blanks

A common antibody strategy is

, where antibodies physically block the binding cites on invaders so they can’t connect to your cells.

Fill in the Blanks

The humoral response allows your body to achieve

by encountering pathogens either randomly or on purpose.

Multiple Choice

Vaccines work on the premise that by introducing a ___ into your body, you are priming it to fight hard and fast the next time it detects that antigen.

• pathogen

• B cell

• T cell

• macrophage

Multiple Choice

While a baby can get antibodies in the womb or in breast milk, it’s system ___ remember an antigen if it gets infected again.

• will

• won't