1. Which stage of Plasmodium is injected into a human by the bite of an infected female Anopheles mosquito?
A.
Sporozoite
B.
Merozoite
C.
Gametocyte
D.
Zygote
Correct Answer:
Sporozoite
Explanation:
The sporozoite is the infective stage of Plasmodium that enters the human body through the mosquito's bite.
2. Where are Plasmodium sporozoites stored in an infected female Anopheles mosquito before transmission?
A.
Salivary glands
B.
Stomach lumen
C.
Malpighian tubules
D.
Ovaries
Correct Answer:
Salivary glands
Explanation:
Sporozoites migrate to and remain in the mosquito's salivary glands, from where they are injected into a human during a bite.
3. What is the immediate destination of Plasmodium sporozoites after entering the human bloodstream?
A.
Liver cells
B.
Red blood cells
C.
Stomach cells
D.
Kidney cells
Correct Answer:
Liver cells
Explanation:
After entering the bloodstream, sporozoites quickly reach the liver and invade liver cells.
4. Sporozoites of Plasmodium are produced from which structure in the mosquito?
A.
Oocyst
B.
Ookinete
C.
Gametocyte
D.
Merozoite
Correct Answer:
Oocyst
Explanation:
The oocyst develops on the stomach wall of the mosquito and produces numerous sporozoites.
5. Which organism transmits Plasmodium sporozoites to humans?
A.
Female Anopheles mosquito
B.
Male Anopheles mosquito
C.
Housefly
D.
Female Aedes mosquito
Correct Answer:
Female Anopheles mosquito
Explanation:
The infected female Anopheles mosquito injects Plasmodium sporozoites into humans while taking a blood meal.
6. The sporozoite is considered which type of stage in humans?
A.
Infective stage
B.
Digestive stage
C.
Sexual stage
D.
Resting stage
Correct Answer:
Infective stage
Explanation:
Sporozoites are the infective forms that enter humans from the bite of an infected mosquito.
7. How do Plasmodium sporozoites enter the human body?
A.
Through the bite of an infected mosquito
B.
Through contaminated drinking water
C.
Through inhaled air
D.
Through an insect egg
Correct Answer:
Through the bite of an infected mosquito
Explanation:
Sporozoites enter the human body with the saliva of an infected female Anopheles mosquito during a bite.
8. In which part of the mosquito does the oocyst that produces sporozoites develop?
A.
Stomach wall
B.
Salivary gland
C.
Head capsule
D.
Wing membrane
Correct Answer:
Stomach wall
Explanation:
The oocyst develops on the outer wall of the mosquito's stomach and later releases sporozoites.
9. After reaching the liver, what do Plasmodium sporozoites do?
A.
Invade liver cells
B.
Become mosquito eggs
C.
Digest red blood cells immediately
D.
Leave the body through sweat
Correct Answer:
Invade liver cells
Explanation:
Sporozoites enter liver cells, where they begin the next stage of the Plasmodium life cycle.
10. Which statement correctly describes the movement of Plasmodium sporozoites in the mosquito?
A.
They move from the oocyst to the salivary glands
B.
They move from the salivary glands to the oocyst
C.
They move from the stomach to the mosquito's eggs
D.
They move from the wings to the digestive tract
Correct Answer:
They move from the oocyst to the salivary glands
Explanation:
After being formed in the oocyst on the stomach wall, sporozoites migrate to the salivary glands for transmission to humans.
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