Science TEAS Practice Test

Correct Answer: B

Rationale: The correct answer is B: Endocrine system. The adrenal glands are a crucial part of the endocrine system as they produce hormones such as cortisol and adrenaline. These hormones regulate various bodily functions like metabolism, stress response, and blood pressure. The immune system (A) is responsible for defending the body against pathogens, not producing hormones. The lymphatic system (C) is involved in immunity and fluid balance, but not hormone production. The respiratory system (D) is responsible for gas exchange in the body, not hormone regulation. Therefore, the adrenal glands being part of the endocrine system is the most accurate choice.

Correct Answer: D

Rationale: The correct answer is D: Homeostasis. The endocrine system is responsible for regulating various physiological processes to maintain internal balance, or homeostasis, within the body. Hormones released by endocrine glands help control metabolism, growth, reproduction, and other functions. Choice A (Heartbeat) is controlled by the cardiovascular system, not the endocrine system. Choice B (Respiration) is controlled by the respiratory system. Choice C (Electrolyte and water balance) is regulated by the kidneys and not directly by the endocrine system. Thus, the primary function of the endocrine system is to maintain homeostasis through hormone regulation.

Correct Answer: C

Rationale: The correct answer is C: Small intestine. This is because the small intestine is where the majority of nutrient absorption occurs in the digestive system. The small intestine is lined with villi and microvilli, which greatly increase its surface area for absorption. Digestive enzymes and bile are also released in the small intestine to further break down nutrients for absorption. The stomach mainly breaks down food, the large intestine primarily absorbs water and electrolytes, and the mouth initiates digestion through chewing and mixing food with saliva.

Correct Answer: D

Rationale: Density is considered an intensive property because it remains constant regardless of the amount of the substance present. Intensive properties do not depend on the quantity of the material. Density is defined as mass per unit volume, so it is independent of the amount of the substance. On the other hand, mass and volume (choices A and C) are extensive properties that change with the amount of the substance, making them not intensive. Weight (choice B) is also not an intensive property as it depends on the gravitational force acting on the object, which can vary.

Correct Answer: A

Rationale: The correct answer is A because it provides a logical and evidence-based explanation for the need for weight loss. Losing weight can lower blood pressure, increase energy levels, and promote overall health, which are all scientifically proven benefits. Choice B is irrelevant to the health benefits of weight loss. Choice C focuses on social perceptions rather than health benefits. Choice D oversimplifies the process of losing weight, which is not always easy and requires effort and commitment.