A myocardial infarction affects which of the following blood vessels of the heart?

A. Pulmonary

B. Aorta

C. Vena cava

D. Coronary

Answer Explanation:

A myocardial infarction (MI), commonly known as a heart attack, occurs when the flow of blood to the heart is blocked. The blockage is usually due to a buildup of fat, cholesterol and other substances in the heart (coronary) arteries. The fatty, cholesterol-containing deposits are called plaques. The process of plaque buildup is called atherosclerosis. Sometimes, a plaque can rupture and form a clot that blocks blood flow. A lack of blood flow can damage or destroy part of the heart muscle .

Therefore, the Correct Answer is D.

Q #1: Which of the following is a group that can be measured against the experimental group?

A. Manipulated

B. Responding

C. Variable

D. Control

Answer Explanation

The experimental group is the group that receives the treatment or intervention in a scientific study. To evaluate the effect of the treatment, the experimental group is compared to another group that does not receive the treatment. This group is called the control group. The control group serves as a baseline or reference point for the experimental group. The control group should be as similar as possible to the experimental group in all other aspects, except for the treatment
Q #2: The cytoskeleton of a cell is comprised of which of the following macromolecules?

A. Carbohydrates

B. Nucleic acids

C. Proteins

D. Lipids

Answer Explanation

The cytoskeleton of a cell is a complex network of filaments and tubules that provides structural support, shape, movement, and organization to the cell and its components.

The cytoskeleton is composed mainly of proteins, which are macromolecules made of amino acids linked by peptide bonds. The three main types of proteins that form the cytoskeleton are microtubules, microfilaments, and intermediate filaments. Each type has a different structure, function, and distribution within the cell.
Q #3: Which of the following best describes the result of using a catalyst in a chemical reaction?

A. The reaction is completed in a shorter amount of time.

B. The yield of product is increased.

C. A greater amount of heat energy is released by the reaction.

D. A more desirable product is often formed.

Answer Explanation

A catalyst is a substance that lowers the activation energy of a chemical reaction, which means that it allows the reaction to proceed faster without being consumed or changed itself. A catalyst does not affect the equilibrium of a reaction, so it does not change the amount or the type of product that is formed.

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A myocardial infarction affects which of the following blood vessels of the heart?

More Questions on TEAS 7 Science

Q #1: Which of the following is a group that can be measured against the experimental group?

Answer Explanation

Q #2: The cytoskeleton of a cell is comprised of which of the following macromolecules?

Answer Explanation

Q #3: Which of the following best describes the result of using a catalyst in a chemical reaction?

Answer Explanation

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