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Which of the following is second line of defense?

Skin

Phagocytosis

Coughing

Sneezing

Answer and Explanation

The Correct Answer is B

A. Skin:

The skin is part of the first line of defense, acting as a physical barrier.

B. Phagocytosis:

Phagocytosis, carried out by white blood cells like macrophages and neutrophils, is a component of the second line of defense, which includes non-specific internal immune responses.

C. Coughing:

Coughing is part of the first line of defense-mechanical clearance.

D. Sneezing:

Like coughing, sneezing is a mechanical defense included in the first line.

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Correct Answer is A

Explanation

A. Nick had immunity against the disease

The scenario implies that Nick had resistance (immunity), preventing illness despite exposure.

B. Rick got a communicable disease

This is true but doesn’t explain why Nick didn’t get sick.

C. Rick had a weak immune system

This is speculative; the key point is that Nick had immunity, not that Rick was unusually weak.

D. Rick got a contagious disease

Contagious diseases can spread, but this still doesn't explain Nick’s protection.

A. The failure of the body to function normally B. A diseased section of the body C. The invasion of the body by a pathogen and the subsequent symptoms in response to the invasion D. The invasion of the body by a disease

Correct Answer is C

Explanation

A. The failure of the body to function normally

This is too general and applies to any illness, not specifically infection.

B. A diseased section of the body

This is vague and doesn’t identify causative factors like pathogens.

C. The invasion of the body by a pathogen and the subsequent symptoms in response to the invasion

This accurately defines infection as a host response to pathogen invasion.

D. The invasion of the body by a disease

Diseases don’t invade; pathogens do. This option is not scientifically accurate.

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Which of the following is second line of defense?

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Naxlex Comprehensive Predictor Exams

In the story of Rick, Nick and Sick Tick why did Rick get sick and not Nick?

Correct Answer is A

Explanation

Which of the following best describes an infection?

Correct Answer is C

Explanation

Which group is incorrect?

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Lymph fluid is: