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chemical and physical Barriers year 9

Authored by Shane Franklin

Biology

8th Grade

Used 4+ times

chemical and physical Barriers year 9
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18 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which is an example of a physical barrier of defense against pathogens?

Stomach acid

Lysosomes

Inflammation

Skin

Answer explanation

Skin is an example of a physical barrier of defense against pathogens, acting as the first line of defense by preventing pathogens from entering the body.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary purpose of the inflammatory response?

To eliminate foreign substances and initiate healing

To increase antigens

To maximise the use of antibiotics

To enhance phagocytes activity

Answer explanation

The primary purpose of the inflammatory response is to eliminate foreign substances and initiate healing, not to increase antigens, maximise the use of antibiotics, or enhance phagocytes activity.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is an example of a chemical barrier in the body's defense against pathogens?

Stomach acid

Fatty acid on the skin

Mucous membrane

All of these

Answer explanation

The correct choice is 'All of these' because stomach acid, fatty acid on the skin, and mucous membrane are all examples of chemical barriers in the body's defense against pathogens.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the purpose of physical and chemical barriers of the body's defense against pathogens?

To prevent entry of pathogens

To neutralise extracellular pathogens

To activate the immune response

To enhance B-cell and T-cell activities

Answer explanation

The purpose of physical and chemical barriers is to prevent entry of pathogens, acting as the first line of defense against infections.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Which of the following is the name for a micro-organism that can cause disease?

Pathogen

Antibodies

B-cells

Lymphocyte

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

This sticky fluid traps any pathogens that try and get in our body

Mucous Lining

Blood

Stomach Acid

Skin

7.

MULTIPLE SELECT QUESTION

30 sec • 1 pt

What are two examples of chemical barriers?

Lysozyme enzyme in our tears

Skin

White Blood Cells

Stomach Acid

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