The major hormone secreted from granulosa cells is

Correct Answer: B

Rationale: The correct answer is B: Estrogen. Granulosa cells are located in the ovarian follicles and are responsible for producing estrogen, a key female sex hormone. Estrogen plays a crucial role in the menstrual cycle, pregnancy, and development of secondary sexual characteristics. Progesterone is mainly produced by the corpus luteum, testosterone is primarily produced by the testes in males, and aldosterone is synthesized in the adrenal glands. Granulosa cells do not secrete these hormones, making choices A, C, and D incorrect.

Correct Answer: D

Rationale: The correct answer is D: Perineum. The perineum is the region between the vaginal orifice and anus. It includes the external genitalia and the area surrounding the anus. The peritoneum (A) is a membrane lining the abdominal cavity, not related to this specific region. Cul-de-sac (B) refers to a pouch-like structure in the abdominal or pelvic cavity, not the area specified in the question. Sac (C) is a general term and does not specifically denote the region between the vaginal orifice and anus. Therefore, the correct answer is D as it accurately describes the anatomical location in question.

Correct Answer: C

Rationale: The correct answer is C: Amniotic sac. This structure is often referred to as the "bag of water" because it is a fluid-filled sac that surrounds and protects the developing fetus during pregnancy. The amniotic sac provides cushioning and maintains a stable environment for the fetus to grow. It is essential for the baby's development and acts as a barrier against infections. Choice A: Urinary bladder - This structure is responsible for storing urine and is not typically referred to as the bag of water. Choice B: Gall bladder - This organ stores bile produced by the liver and aids in digestion, not related to pregnancy or fetal development. Choice D: Uterus - While the uterus is involved in pregnancy and fetal development, it is not commonly referred to as the bag of water.

Correct Answer: D

Rationale: The correct answer is D: Osteomyelitis. Osteomyelitis refers to inflammation of bone and bone marrow secondary to infection. "Osteitis" (choice A) is a general term for bone inflammation without specifying infection. "Osteochondritis" (choice B) is inflammation of bone and cartilage, not bone marrow. "Osteom" (choice C) is not a recognized medical term. Therefore, based on the specific definition provided in the question, osteomyelitis is the most appropriate answer.

Correct Answer: B

Rationale: The lower jaw bone is known as the mandible. The mandible is the only movable bone in the skull, forming the lower jaw and holding the lower teeth in place. The maxilla (A) is the upper jaw bone. The temporal bone (C) is a bone that forms part of the skull, but it is not the lower jaw bone. Menton (D) is a landmark on the mandible, not the name of the bone itself. Therefore, the correct answer is B (Mandible) as it is specifically designated as the lower jaw bone.