Which of the following tissues lines the interior structures of the heart?

A. Epicardium

B. Pericardium

C. Myocardium

D. Endocardium

Answer Explanation:

The endocardium lines the interior structures of the heart. It is a thin, innermost layer of the heart wall that lines the heart chambers and valves. It is composed of subendocardial connective tissue and endothelial cells that are continuous with blood vessel endothelium.

Therefore, the Correct Answer is D.

Q #1: The component of an atom that possesses relatively little mass, thus being negligible in calculating the atomic mass number, is the:

A. Electron

B. Quark

C. Neutron

D. Proton

Answer Explanation

Rationale

Electrons are subatomic particles that have relatively little mass and are negligible when calculating atomic mass. The atomic number is usually the sum of protons and neutrons in the nucleus of the atom.
Q #2: Which of the following cells transfers pigment granules to adjacent epidermal cells?

A. Melanocytes

B. Merkel cells

C. Langerhans cells

D. Keratinocytes

Answer Explanation

Melanocytes are specialized skin cells that produce melanin, which is the protective skin-darkening pigment. They are found mainly in the epidermis, though they occur elsewhere, such as in the hair.
Q #3: Which of the following types of cells stimulates other immune cells to attack and destroy foreign agents?

A. Cytotoxic T-cells

B. Plasma cells

C. Natural killer cells

D. Helper T-Cells

Answer Explanation

Helper T cells are important cells that stimulate the action of other immune cells. For instance, they not only help activate B cells to secrete antibodies and macrophages to destroy ingested microbes, but they also help activate cytotoxic T cells to kill infected target cells.

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Which of the following tissues lines the interior structures of the heart?

More Questions on TEAS 7 Science

Q #1: The component of an atom that possesses relatively little mass, thus being negligible in calculating the atomic mass number, is the:

Answer Explanation

Q #2: Which of the following cells transfers pigment granules to adjacent epidermal cells?

Answer Explanation

Q #3: Which of the following types of cells stimulates other immune cells to attack and destroy foreign agents?

Answer Explanation

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