General human Defence

What is a pathogen

• A pathogen is a healthy microorganism.
• A pathogen is a microorganism that causes disease.
• A pathogen is a type of vaccine.
• A pathogen is a type of antibiotic.

Which of the following is an example of pathogenic bacteria

• Athletes foot

• Covid- 19

• Staphylococcus aureus
• Escherichia coli (E. coli)

Give an example of a pathogenic viruse

• Ebola virus
• Influenza virus
• E-coli

• Athletes foot

The general defence system is non specific

• True
• False

The barrier of the body includes which of the following

• Skin and mucous membranes
• Blood and organs
• Bones and muscles
• Hair and nails

Cracked or broken skin can lead to a

• healing process
• moisturizing effect
• infection
• skin elasticity improvement

How does mucous protect against infections in the body

• Mucous is primarily used to absorb nutrients and energy.
• Mucous protects against infections by trapping pathogens and containing antimicrobial substances.
• Mucous acts as a barrier by hardening and blocking all pathogens.
• Mucous helps in digestion by breaking down food particles.

Short hairs present in the respiratory system that help to force foreign particles up the windpipe

• Villi
• Microvilli
• Cilia
• Alveoli

Blood clotting prevents the entry of pathogens into the body, name the blood cell that is responsible for blood clotting in the body

• Plasma cells
• White blood cells
• Red blood cells
• Platelets

Give the official name of the platelets

• Neutrophils
• Leukocytes
• Thrombocytes
• Erythrocytes