Practice TEAS Science Test

Correct Answer: C

Rationale: Natural Killer Cells produce Perforin to create pores in the target cell membrane, leading to target cell rupture. Perforin forms channels in the cell membrane, allowing for the entry of granzymes that induce apoptosis in the target cell. Interferon is produced by infected cells to inhibit viral replication. Apoptosis is a programmed cell death process. Antibodies are produced by B cells in response to antigens but are not involved in the direct lysis of target cells by Natural Killer Cells.

Correct Answer: C

Rationale: The correct answer is C: Humerus. The humerus is the long bone found in the upper arm. It connects the shoulder to the elbow joint. The femur (A) is the long bone found in the thigh, the tibia (B) is the larger of the two lower leg bones, and the radius (D) is one of the two lower arm bones. The humerus is the only bone among the choices that is specifically located in the upper arm, making it the correct answer.

Correct Answer: A

Rationale: The correct answer is A: Amygdala. The amygdala is responsible for processing emotions, emotional behavior, and motivation. It plays a crucial role in fear and pleasure responses. It also helps in memory consolidation of emotional events. The other choices, B: Cerebellum, C: Hypothalamus, and D: Pons, do not primarily govern emotions and motivation. The cerebellum is mainly involved in motor control, the hypothalamus regulates basic functions like hunger and thirst, and the pons controls sleep and arousal. Therefore, the amygdala is the correct answer for its specific role in emotions and motivation.

Correct Answer: B

Rationale: The correct answer is B: Larynx. The voice box, also known as the larynx, is responsible for producing sound by manipulating airflow from the lungs. The other choices are incorrect because: A: Alveoli are small air sacs in the lungs for gas exchange. C: Trachea is the windpipe that carries air to and from the lungs. D: Pharynx is the throat region where the nasal and oral cavities meet.

Correct Answer: D

Rationale: The correct answer is D: All of the above. The large intestine plays a crucial role in absorbing water to form solid waste (A). It also houses beneficial bacteria that produce vitamin K, essential for blood clotting and bone health (B). Additionally, the large intestine is involved in the absorption of some vitamin B compounds produced by gut bacteria (C). Thus, all the functions listed (A, B, C) are carried out by the large intestine. Other choices are incorrect because they do not encompass all the functions performed by the large intestine.