ati teas 7 science

Correct Answer: C

Rationale: The correct answer is C: Ecology. Ecology is the scientific study of the relationships between organisms and their environment. It focuses on the interactions between living organisms and their surroundings. Zoology (A) is the study of animals, Botany (B) is the study of plants, and Genetics (D) is the study of genes and heredity, which are not directly related to the relationships between organisms and their environment. Therefore, Ecology is the most appropriate choice for this question.

Correct Answer: B

Rationale: The correct answer is B: Cardiac muscle. Cardiac muscle is found exclusively in the heart, allowing it to contract rhythmically and involuntarily to pump blood throughout the body. Smooth muscle (A) is found in organs like the intestines and blood vessels, not in the heart. Skeletal muscle (C) is attached to bones and responsible for voluntary movements, while voluntary muscle (D) is a general term that refers to skeletal muscle controlled voluntarily. Therefore, the unique characteristics of cardiac muscle make it the correct answer for this question.

Correct Answer: C

Rationale: The correct answer is C: Small intestine. The small intestine is the primary site for nutrient absorption in the digestive system due to its large surface area, specialized structures called villi, and microvilli that maximize absorption efficiency. Digestive enzymes and bile are also released in the small intestine to break down nutrients for absorption. The other choices are incorrect because the esophagus is responsible for swallowing, the large intestine mainly absorbs water and electrolytes, and the stomach primarily functions in digestion by secreting gastric juices.

Correct Answer: C

Rationale: The correct answer is C: Vitamin D. When the skin is exposed to sunlight, a form of cholesterol in the skin is converted into Vitamin D. This vitamin plays a crucial role in calcium absorption and bone health. Vitamin A is not synthesized in the skin but obtained through diet. Vitamin C is obtained from fruits and vegetables. Vitamin E is a fat-soluble vitamin found in nuts and seeds. In summary, only Vitamin D is synthesized in the skin upon sunlight exposure, making it the correct answer.

Correct Answer: B

Rationale: The correct answer is B: Tendons. Tendons are tough connective tissues that attach skeletal muscles to bones. They transmit the force generated by muscles to the bones, allowing movement. Ligaments (A) connect bones to other bones, not muscles. Cartilage (C) is a firm, flexible connective tissue found in joints, not directly involved in muscle attachment. Fascia (D) is a connective tissue that surrounds muscles, but it does not directly attach muscles to bones.