The endocrine gland that is both an exocrine and endocrine gland is

Correct Answer: C

Rationale: The pancreas functions as both an exocrine gland (digestive enzymes via ducts) and an endocrine gland (insulin, glucagon into blood). 'Pancreas,' is correct, per anatomy texts like Moore, with acini (exocrine) and islets (endocrine). 'Adrenal gland,' and 'Pituitary gland,' are purely endocrine. 'Thyroid gland,' is endocrine only. The pancreas' dual role in digestion and glucose regulation makes C the precise answer, unique among endocrine glands.

Correct Answer: B

Rationale: The male urethra averages 20 cm, spanning prostatic, membranous, and spongy parts. '20 cm,' is correct, per anatomy texts like Netter, varying slightly (18-22 cm). '15 cm,' is short. '25 cm,' and '30 cm,' exceed typical length. The 20 cm standard reflects its path from bladder to external meatus, making B the accurate answer.

Correct Answer: B

Rationale: Vital capacity is the maximum air exhaled after full inhalation, about 4.8 L. 'Vital capacity,' is correct, per physiology (e.g., Tortora). 'Tidal volume,' is normal breath. 'Residual volume,' stays in lungs. 'Total lung capacity,' includes residual. Vital capacity's exhalable measure distinguishes B as the precise answer.

Correct Answer: C

Rationale: Long bones are longer than wide, in limbs. 'Carpals,' is correct as the exception, short bones in the wrist, per anatomy (e.g., Tortora). 'Humerus,' 'Femur,' and 'Tibia,' are long bones. Carpals' compact shape makes C the precise answer.

Correct Answer: B

Rationale: The skin, covering the body, is the largest organ by surface area and weight (about 15% of body mass). 'Skin,' is correct, per anatomy (e.g., Tortora). 'Liver,' is largest internal. 'Heart,' and 'Lungs,' are smaller. Skin's expanse makes B the precise answer.