Nokea
The internal male genital organs are represented by the following structures, EXCEPT:
- A. testicles;
- B. deferent ducts;
- C. corpora cavernosa;
- D. bulbourethral glands;
Correct Answer: C
Rationale: Step-by-step rationale for why choice C (corpora cavernosa) is correct:
1. Corpora cavernosa are erectile tissue in the penis, not internal male genital organs.
2. Testicles, deferent ducts, and bulbourethral glands are actual internal male genital organs.
3. Corpora cavernosa are involved in penile erection, not in male reproductive system functions.
Summary of why other choices are incorrect:
A: Testicles - Produces sperm and male sex hormones.
B: Deferent ducts - Transport sperm from the testicles to the urethra.
D: Bulbourethral glands - Produce pre-ejaculatory fluid to lubricate the urethra.
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Braxton Hicks contractions are a sign
- A. progesterone of
- B. oxytocin
- C. parturition.
- D. childbirth.
Correct Answer: B
Rationale: The correct answer is B: oxytocin. Braxton Hicks contractions are irregular, painless contractions of the uterus that occur throughout pregnancy. Oxytocin is the hormone responsible for stimulating contractions during labor. Therefore, the presence of Braxton Hicks contractions indicates the preparation of the uterus for labor under the influence of oxytocin. Choices A, C, and D are incorrect as they do not directly relate to the physiological mechanism of Braxton Hicks contractions.
The depression or socket in the pelvic bone into which the head of the femur articulates is called
- A. Glenoid fossa
- B. Mandibular fossa
- C. Jugular fossa
- D. Acetabulum
Correct Answer: D
Rationale: The correct answer is D: Acetabulum. The acetabulum is the depression in the pelvic bone where the head of the femur articulates. This articulation forms the hip joint. The glenoid fossa (A) is found in the scapula and articulates with the head of the humerus, not the femur. The mandibular fossa (B) is located in the temporal bone and articulates with the mandible, not the femur. The jugular fossa (C) is a groove in the temporal bone for the internal jugular vein, not related to the femur articulation. Therefore, the correct choice is D as it accurately describes the anatomical structure where the femur articulates with the pelvic bone.
The only movable facial bone is _____________.
- A. Mandible
- B. Maxilla
- C. Vomer
- D. Ethmoid
Correct Answer: A
Rationale: The correct answer is A: Mandible. The mandible is the only movable facial bone as it forms the lower jaw and is connected to the skull by the temporomandibular joint, allowing for movements like chewing and speaking. Maxilla, Vomer, and Ethmoid are all facial bones, but they are fixed in place and do not have the same range of motion as the mandible. Maxilla forms the upper jaw, Vomer is a bone in the nasal cavity, and Ethmoid is a bone between the eyes. Therefore, the mandible is the only bone among the options that is capable of movement, making it the correct answer.
The vascularization of the ovary is provided by the:
- A. the gonadal artery, of the abdominal aorta;
- B. the ovarian branch of the uterine artery;
- C. the ovarian artery, of the external iliac artery;
- D. the Fallopian artery;
Correct Answer: B
Rationale: The correct answer is B: the ovarian branch of the uterine artery. The ovary receives its blood supply primarily from the ovarian artery, which arises from the abdominal aorta. However, the ovarian artery is a short vessel that anastomoses with the uterine artery, providing the main vascularization of the ovary. The other choices are incorrect because: A) the gonadal artery arises from the internal iliac artery, not the abdominal aorta; C) the ovarian artery does not arise from the external iliac artery; D) there is no specific Fallopian artery responsible for ovarian vascularization.
Fertilization occurs in the:
- A. uterus
- B. fallopian tubes
- C. labia
- D. vagina
Correct Answer: B
Rationale: The correct answer is B: fallopian tubes. Fertilization occurs in the fallopian tubes where the sperm meets the egg. The fallopian tubes are where the egg is released from the ovary and where fertilization takes place. The uterus (choice A) is where the fertilized egg implants and develops into a fetus. The labia (choice C) are external genital structures and do not play a role in fertilization. The vagina (choice D) is the birth canal and does not directly participate in fertilization. Therefore, the fallopian tubes are the correct choice for the site of fertilization in the female reproductive system.