Consider statements about human diseases: 1. Cholera is a bacterial disease. 2. Polio is a viral disease. 3. Malaria is transmitted by a mosquito. Which are correct? MCQ with Answer and Explanation

Question

Consider statements about human diseases: 1. Cholera is a bacterial disease. 2. Polio is a viral disease. 3. Malaria is transmitted by a mosquito. Which are correct?

A. 2 and 3 only

B. 1 and 2 only

C. 1, 2 and 3

D. 1 and 3 only

Answer: Option C

Solution (By JKExamLibrary)

Cholera is an acute diarrheal illness caused by the bacterium Vibrio cholerae, typically transmitted through contaminated water. Polio (poliomyelitis) is a highly infectious viral disease caused by the poliovirus, which can lead to paralysis. Malaria is a life-threatening disease caused by Plasmodium parasites, which are transmitted to humans through the bites of infected female Anopheles mosquitoes. All three statements are correct.

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Question #1

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The part of the neuron that receives signals from other neurons is the:

A. Axon

B. Dendrite

C. Axon terminal

D. Cell body

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Correct Answer: Option B

Explanation:
Dendrites are branched extensions of the neuron cell body that receive synaptic inputs from other neurons and transmit graded potentials towards the soma. The axon conducts action potentials away from the soma to the terminals, which then synapse with other cells. Dendrites have receptor sites for neurotransmitters.

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Question #2

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The functional unit of the human kidney where filtration occurs is the:

A. Loop of Henle

B. Bowman's capsule

C. Distal tubule

D. Renal corpuscle

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Correct Answer: Option D

Explanation:
The renal corpuscle consists of the glomerulus (capillary tuft) and Bowman's capsule. This is where ultrafiltration of blood occurs. The filtrate then passes through the proximal tubule, loop of Henle, distal tubule, and collecting duct. The loop of Henle concentrates urine, the tubules reabsorb and secrete. The nephron is the complete functional unit.

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Question #3

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The part of the brain that acts as a relay station for sensory information is the:

A. Cerebellum

B. Thalamus

C. Medulla

D. Hypothalamus

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Correct Answer: Option B

Explanation:
The thalamus, a paired structure in the diencephalon, processes and relays sensory information (except olfaction) to the cerebral cortex. It also regulates consciousness and alertness. The cerebellum coordinates movement, hypothalamus maintains homeostasis, medulla controls vital reflexes.

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