Heartworm Disease Is a Serious and Potentially Fatal Disease in Dogs

question 34

Multiple Choice

Heartworm disease is a serious and potentially fatal disease in dogs. It is caused by a worm called Dirofilaria immitis. As many as 30 species of mosquitoes can transmit heartworms. Adult heartworms live in the heart and pulmonary arteries of infected dogs. Adult worms cause disease by clogging the heart and major blood vessels leading from the heart and also interfere with the valve action in the heart. By clogging the main blood vessels, the blood supply to other organs of the body is reduced, particularly to the lungs, liver, and kidneys, leading to malfunction of these organs. This is an example of

• A) ectoparasitism.
• B) mutualism.
• C) amensalism.
• D) predation.
• E) endoparasitism.

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Definitions:

Lean Management System

A systematic approach for eliminating waste within a manufacturing system without sacrificing productivity.

Material Price Variance

The difference between the actual cost of materials purchased and the expected (or standard) cost, reflecting how effectively a company controls its material costs.

Executive Managers

Senior-level employees responsible for the strategic planning and direction of a company's operations.

Operating Income

A measure of a company's profit that excludes non-operating expenses such as interest and taxes, focusing on the profit generated from core business operations.