Welcome to the Quiz!
This quiz contains 12 questions from a mix of 1 subtopics.
Which of the following act as barriers to reduce the entry of pathogens?
(Select all that apply)
Skin
Phagocytes
White blood cells
Hairs in the nose
Enzymes in tears
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How does skin help to defend against disease?
(Select all that apply)
It covers the body, physically preventing pathogens from entering
It traps pathogens so that they can be removed
It secretes oils and antimicrobial substances that kill pathogens
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Does skin act as a physical or chemical barrier to pathogens?
Physical barrier
Chemical barrier
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The nose has hairs inside it that act as a physical barrier to pathogens. What are the hairs in the nose coated with to catch pathogens?
Enzymes
Phagocytes
Mucus
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The cells that line the trachea, bronchi and bronchioles have tiny hair-like projections that waft the mucus and pathogens away from the lungs.
What are these structures called?
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What substance does the stomach produce to kill pathogens?
Enzymes
Mucus
Nitric acid
Hydrochloric acid
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Does the acid produced by the stomach act as a physical barrier, or a chemical barrier, to pathogens?
Physical barrier
Chemical barrier
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What is the role of the immune system?
The allow communication between different parts of the body
To locate and destroy pathogens that enter the body
To regulate the level of water and ions in the blood
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Which type of cells are part of the immune system?
Red blood cells
Skin cells
Nerve cells
White blood cells
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Which of the following are functions of white blood cells?
(Select all that apply)
Phagocytosis
Produce antitoxins
Producing antibodies
Produce hormones
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Stages of phagocytosis
cells / engulf / make / destroy / bind / phagocyte
- Phagocytosis is carried out by a special type of white blood cell called a .
- The first step is for the phagocyte to track down a pathogen, and then to it.
- The phagocyte's membrane will then surround the pathogen and it.
- Finally, enzymes inside the phagocyte break down the pathogen in order to it.
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What do antitoxins do?
Stimulate the immune system
Kill pathogens
Bind and neutralise the toxins produced by bacteria
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