Nokea
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.
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The _________ is a temporary organ that connects a mammalian mother to its foetus.
- A. Placenta
- B. Chorion
- C. Endometrium
- D. None of the above These are some important human reproduction MCQs for class
Correct Answer: A
Rationale: The correct answer is A: Placenta. The placenta is a temporary organ that connects a mammalian mother to its foetus by facilitating the exchange of nutrients, gases, and waste products between the mother and the developing baby. It also produces hormones necessary for pregnancy.
Explanation of other choices:
B: Chorion - The chorion is a membrane that surrounds the embryo and contributes to the formation of the placenta, but it is not the organ that directly connects the mother to the foetus.
C: Endometrium - The endometrium is the inner lining of the uterus where implantation of the fertilized egg occurs, but it is not the organ that connects the mother to the foetus.
D: None of the above - This choice is incorrect as the placenta is indeed the temporary organ that serves as the connection between the mother and the foetus in mammalian reproduction.
Two days before the onset of menstruation, secretions of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) reach their lowest levels. What is the cause of this low level of secretion?
- A. The anterior pituitary gland becomes unresponsive to the stimulatory effect of gonadotropin-releasing hormone (GnRH)
- B. Estrogen from the developing follicles exerts a feedback inhibition on the hypothalamus
- C. The rise in body temperature inhibits hypothalamic release of GnRH
- D. Secretion of estrogen, progesterone, and inhibin by the corpus luteum suppresses hypothalamic secretion of GnRH and pituitary secretion of FSH
Correct Answer: D
Rationale: The correct answer is D because two days before menstruation, the corpus luteum secretes estrogen, progesterone, and inhibin, which collectively suppress the hypothalamus's secretion of GnRH and the pituitary gland's secretion of FSH and LH. This hormonal feedback loop helps prepare the body for menstruation.
A: The anterior pituitary gland becoming unresponsive to GnRH does not explain the low FSH and LH levels.
B: Estrogen from developing follicles typically exerts a positive feedback on the hypothalamus, not inhibitory feedback.
C: The rise in body temperature does not directly impact FSH and LH levels; it is more related to ovulation.
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.
You observe a student nurse accomplishing all of these activities while caring for a client who has an intracavitary radioactive implant in place to treat cervical cancer. Which action requires that you intervene immediately?
- A. The student stands next to the client for 5 minutes while assisting with her bath.
- B. The student asks the client how she feels about losing her child-bearing ability.
- C. The student assists the client to the bedside commode for a bowel movement.
- D. The student offers to get the client whatever she would like to eat or drink.
Correct Answer: A
Rationale: Standing next to the client increases the student's exposure to radiation, requiring immediate correction.
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.