At what point does bile enter the gastrointestinal tract?

Correct Answer: D

Rationale: Bile enters the duodenum (D) via the bile duct. Cecum (A), jejunum (B), and ileum (C) are later in the tract.

Correct Answer: A

Rationale: The nose (A) is anterior (front). Ears (B) are lateral, occipital lobe (C) is posterior, and temporal lobe (D) is lateral.

Correct Answer: B

Rationale: The thyroid needs iodine (B) to synthesize T4. Potassium (A), sodium (C), and magnesium (D) are not directly required.

Correct Answer: A

Rationale: Pepsin breaks down proteins (A) in the stomach. Starches (B) are amylase, fats (C) are bile/lipase, and absorption (D) is intestines.

Correct Answer: A

Rationale: Smooth muscles (A) drive peristalsis in the gut. Cardiac (B) is heart, skeletal (C) is voluntary, and epaxial (D) is back.