Practice Science TEAS Test

Correct Answer: A

Rationale: The correct answer is A. Macrophages are not found abundantly in the blood as they primarily reside in tissues. Neutrophils are the most abundant white blood cells in the blood. Choice B is correct as macrophages are indeed larger than neutrophils. Choice C is correct as macrophages are long-lived cells. Choice D is correct as monocytes are produced in the bone marrow and differentiate into macrophages once they migrate to tissues.

Correct Answer: B

Rationale: Cytokinesis refers to the division of the cytoplasm during cell division, specifically following the separation of chromosomes. This process results in two daughter cells being formed. The correct answer is B because it accurately describes the final step in cell division where the cytoplasm is divided to complete the formation of two separate daughter cells. Choices A, C, and D are incorrect as they do not specifically pertain to the process of cytokinesis. Choice A refers to the division of the nucleus, which is known as mitosis. Choice C refers to the separation of chromosomes, which is part of the earlier stages of cell division. Choice D refers to the formation of spindle fibers, which are involved in chromosome movement during mitosis but not directly related to cytokinesis.

Correct Answer: B

Rationale: The correct answer is B: Cell membranes. Mesosomes are internal extensions of the cell membrane in prokaryotic cells. They are involved in cell division, DNA replication, and formation of respiratory enzymes. Choice A (Capsule) is incorrect because capsules are external structures surrounding the cell membrane. Choice C (Cell wall) is incorrect as mesosomes are not related to the cell wall, which provides structural support. Choice D (Chromatin body) is incorrect because chromatin bodies are found in eukaryotic cells, not prokaryotic cells where mesosomes are present.

Correct Answer: B

Rationale: The correct answer is B: Melanocyte. Melanocytes are specialized cells in the skin that produce melanin, the pigment responsible for skin color. They are located in the epidermis and transfer melanin to nearby keratinocytes. Sudoriferous glands (A) produce sweat, sebaceous glands (C) produce sebum, and hair follicles (D) are responsible for hair growth. Therefore, they are not involved in melanin production in the skin.

Correct Answer: B

Rationale: The correct answer is B: To provide structural support. The skeletal system functions to support the body, protect internal organs, allow movement, and produce blood cells. Structural support is a primary function as bones form the framework of the body. Red blood cell production occurs in the bone marrow, not the skeletal system directly (A). Nutrient transport primarily involves the circulatory system, not the skeletal system (C). Fat storage is not a function of the skeletal system; it is mainly stored in adipose tissue (D). In summary, the skeletal system's main function is to provide structural support for the body.