1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
tensa zangetsu [6.8K]
3 years ago
12

What is the single most critical defense system of your body? 2. how do mucous membranes provide protection from invading organi

sms? 3. what is immunity? 4. explain what an antigen is. 5. what are antibodies? 6. how do b and t lymphocytes (t cells) help in a body's immune system? 7. how does fever in a human body help fight infection? 8. how does pain in response to infection or injury help a body in response to invasion? 9. vaccinations are giving to prevent infection. how do vaccinations work? why should children and adults be given vaccinations? 10. what is active and passive immunity?
Biology
1 answer:
eduard3 years ago
4 0

Answer 1:  

              The most critical defense system of our body is known as immune system.  

Discovery

            More than 2000 years ago, the Greek historian Thucydides observed that occasionally some-one contact a disease, recovers and never catches the disease again, the person has become immune to the subsequent infection. In 1796 an English country doctor Edward Jenner hypothesized that cowpox somehow conferred protection against smallpox.  

Components of immune system

                 Immune system is composed of three line of defense, these are:  

1. First line of defense  

                 It is non-specific defense and consist of skin, mucus and cilia.  

2. Second line of defense  

               It is also non-specific defense includes macrophages, neutrophils, natural killer cells and complement system etc.  

3. Third line of defense

            It is specific defense and accomplished by B-cells and T-cells though cell mediated immunity and humoral mediated immunity.  


Answer 2.  

First line of defense include mucus membrane and skin. It is non-specific defense. it provide protection through the following ways:

Role of mucus membrane

1. Mucus membrane cover the digestive and respiratory tract and acts as a barrier to microbial invasion.  

2. Mucus membrane line the inside of the nose to trap particles before they enter the body.  

3. Mucus add moisture to each breath to prevent he airways and lungs from becoming dry and damaged. As air passes through the nasal cavity, moisture is transferred from the mucus secreted by the lining of the nasal cavity into the air.  

4. Inside lungs a thin coat of mucus membrane is present inside alveoli which catches the dust and bacteria and swept them towards wind pipe through beating of cilia.  


Answer 3:

Definition

               The ability to resist damage from foreign substances such as microorganisms and harmful chemicals is known as immunity.  

Explanation

           Immunology is the study of immunity and the defense mechanism of the body. Immunity is one of the most important job provided to body in a number of ways, like in the form of anti-bodies, WBC, interferons etc.

Types of immunity

            Immunity may be active or passive both types are achieved naturally or artificially.  

Download file for remaining seven answers.

Download docx
You might be interested in
What physical constraints control crossover frequencies.
nata0808 [166]
The probability of a crossover occurring between two particular genes on the same chromosome increases as the distance between those
8 0
2 years ago
Explain the importance of geoneutrinos to understanding earth’s interior
otez555 [7]

Answer:

“Geoneutrinos,” neutrinos that stream naturally from the Earth’s interior, are giving scientists the best direct evidence of what’s at work in the belly of the planet. Released by naturally occurring radioactive isotopes inside the Earth, geoneutrinos carry information about what makes the Earth’s insides hot; what elements make up the core of our planet and in what concentration and distribution; how the Earth’s mantle and tectonic plates move and interact; and how planets like our own form and evolve.

5 0
3 years ago
Read 2 more answers
Which winds are usually warmer and more humid?
Anna71 [15]

Answer:

winds blowing from the south I know cause I'm in flvs aren't you I have that question

Explanation:

5 0
2 years ago
The word microcosm is made up of the prefix -micro and The root word -cosm
Leviafan [203]
A. Order, Arrangement, world and Universe
5 0
3 years ago
Explain how egestion differs from excretion (3 marks)
Nuetrik [128]

Egestion is the discharge or expulsion of undigested material (food) from a cell while excretion is process of eliminating or expelling waste matter (that had already been digested)

4 0
3 years ago
Other questions:
  • HELP PLZ!
    12·1 answer
  • Which system is responsible for protection as well as support of the body's weight?
    11·2 answers
  • BRAINLYEST WHO EVER ANSWERED FIRSSSSST HURRRRRRRRY!!!!!!!
    8·1 answer
  • What is created from mitosis in animals?
    11·1 answer
  • If you spend a lot of time in the sun, then you will increase your risk of skin cancer. Manipulated variable (Independent Variab
    10·2 answers
  • What does your gallbladder do in digestion?
    8·1 answer
  • What tissues are included in the connective tissues?
    5·2 answers
  • What are the three parts of modern cell theory. Choose all that apply.
    15·1 answer
  • Organisms need ___ to conduct essential life activities
    10·2 answers
  • Please help i dont undrstand
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!