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Microbiology: Parasitology and Protists Overview

Microbiology: Parasitology And Protists Overview

This assessment focuses on the study of helminths as covered in Chapter 9 of Unit 2 Microbiology. It delves into the parasitological aspects of helminths, testing knowledge crucial for students and professionals in microbiology...

Questions: 21 | Attempts: 10 | Last updated: Aug 4, 2025

Sample Question 1
Define the terms parasitology and pathogen.

Parasitology: study of memory functions, pathogen: a harmless organism found in nature

Parasitology: study of weather patterns, pathogen: a non-living substance that causes illness

Parasitology: study of plants, pathogen: a type of treatment for diseases

Parasitology: study of organisms that live at the expense of their host pathogen: a parasitic organism that causes disease

Sample Question 2
Describe how the relationship between a parasite and its host develops over time.

The relationship between a parasite and its host always remains the same, without any changes.

Hosts eventually evolve to completely eliminate parasites.

If you looked at these relationships over long periods of time, you would see that parasites tend to become more adapted to and less destructive of their hosts.

Over time, parasites become more harmful to their hosts.

Sample Question 3
Distinguish between a biological and mechanical vector.

A biological vector is a vector that does not involve any living organisms in the transmission of a parasite.

A biological vector transfers a parasite by physically carrying it from host to host.

A mechanical vector transmits a parasite through its bite.

A biological vector internalizes the parasite in between hosts. For example, the disease malaria is caused by a protozoan parasite Plasmodium vivax. The biological vector which transmits the parasite from host to host is the Anopheles mosquito. When a mosquito bites a person with malaria, it can pick up the parasite and internalize it before transmitting it to a new host. A mechanical vector is a vector which physically or mechanically transfers a parasite from place to place. For example, imagine an ant crawling across dog "droppings" at the park and then across your picnic. If those droppings contained bacteria such as E. coli, they could be mechanically transferred to your food in this way.