TEAS Practice Test Science

Correct Answer: C

Rationale: The correct answer is C: Skull. The axial skeleton consists of bones along the central axis of the body, including the skull. The skull protects the brain and is a key part of the axial skeleton. The other choices - A (Femur), B (Humerus), and D (Pelvis) are all part of the appendicular skeleton, which includes the bones of the limbs and girdles. The femur is the thigh bone, the humerus is the upper arm bone, and the pelvis is part of the hip bone, all of which are not considered part of the axial skeleton.

Correct Answer: B

Rationale: The correct answer is B: Pancreas. The pancreas is responsible for producing insulin because it contains clusters of cells called islets of Langerhans, specifically beta cells, which secrete insulin. The liver (A) plays a role in regulating blood sugar levels but does not produce insulin. The gallbladder (C) stores bile and aids in digestion, not insulin production. The spleen (D) is important for immune function but does not produce insulin. Therefore, the pancreas is the correct choice for producing insulin.

Correct Answer: B

Rationale: The correct answer is B: Fight infection. White blood cells are a crucial part of the immune system, responsible for identifying and attacking foreign invaders such as bacteria, viruses, and other pathogens. They play a key role in defending the body against infections and diseases. Choices A, C, and D are incorrect because white blood cells do not primarily function in transporting oxygen, producing antibodies, or regulating body temperature. Oxygen transport is mainly the role of red blood cells, antibody production is the function of B cells, and body temperature regulation involves processes such as sweating and shivering controlled by the hypothalamus.

Correct Answer: C

Rationale: The correct answer is C: Natural Killer cells. Natural Killer cells are part of the innate immune response as they can recognize and eliminate infected or abnormal cells without prior exposure. B-cells and cytotoxic T-cells are part of the adaptive immune response, requiring specific antigens to respond. Antigen-Presenting Cells play a crucial role in initiating the adaptive immune response by presenting antigens to T-cells. Therefore, Natural Killer cells are the only cells listed that belong to the innate immune response.

Correct Answer: C

Rationale: The correct answer is C, interstitial space. Lymph flows through the interstitial space, which is the fluid-filled space between cells in tissues. Arteries and veins carry blood, not lymph. Lumen is the inside space of a tubular structure, such as a blood vessel, and does not specifically refer to where lymph flows. Therefore, the interstitial space is the most appropriate term for the space where lymph flows through the body.