Nokea
Which of the following is greater after birth than before birth?
- A. Flow through the foramen ovale
- B. Pressure in the right atrium
- C. Flow through the ductus arteriosus
- D. Aortic pressure
Correct Answer: D
Rationale: Step-by-step rationale:
1. After birth, the foramen ovale closes, reducing flow (A)
2. Pressure in the right atrium decreases due to closing of fetal shunts (B)
3. Ductus arteriosus closes, reducing flow (C)
4. Aortic pressure increases as systemic circulation begins (D)
Summary:
A, B, and C decrease after birth due to closure of fetal shunts, while D increases as systemic circulation takes over, making it the correct choice.
You may also like to solve these questions
This tiny gland produces a secretion that is similar to a large lysosome and that cleanses the male urethra of assists penetration of the egg is called traces of acidic urine prior to the ________.
- A. flagellum
- B. prostate
- C. midpiece
- D. bulbo-urethral gland
Correct Answer: D
Rationale: The correct answer is D: bulbo-urethral gland. This gland produces a clear secretion that neutralizes traces of acidic urine, lubricates the urethra, and assists in sperm motility. The other choices are incorrect because:
A: Flagellum is a structure on sperm cells for propulsion.
B: Prostate produces seminal fluid but does not cleanse the urethra.
C: Midpiece is a part of the sperm cell that contains mitochondria for energy production, not a gland.
Regarding gross anatomy of male reproductive system
- A. Dartos muscle is responsible to raise and lower the testes
- B. Ductus deferens penetrate the prostate gland to connect with prostatic urethra
- C. Anterior lobe of prostate gland is the main glandular tissue
- D. Buck's fascia encloses body of penis
Correct Answer: B
Rationale: The correct answer is B because the ductus deferens penetrates the prostate gland to connect with the prostatic urethra, forming the ejaculatory duct. This allows for the transport of sperm from the epididymis to the urethra during ejaculation.
A: Dartos muscle is responsible for wrinkling the scrotal skin but not raising and lowering the testes.
C: The anterior lobe of the prostate gland mainly consists of fibromuscular tissue, not glandular tissue.
D: Buck's fascia surrounds the corpora cavernosa and the corpus spongiosum of the penis, not the body of the penis itself.
When a nurse is educating a group of women about the risks of breast cancer, she includes which of the following common risk factor?
- A. Older than 30 years of age
- B. Family history of breast cancer
- C. African-American heritage
- D. Breast tenderness, without any sensation
Correct Answer: B
Rationale: Family history is a well-established risk factor for breast cancer.
Which of the following is the site of fertilization?
- A. Ureters
- B. Urethra
- C. Uterine tubes
- D. Ovaries
Correct Answer: C
Rationale: The correct answer is C, Uterine tubes. Fertilization occurs in the uterine tubes, also known as Fallopian tubes, where the sperm and egg meet to form a zygote. The uterine tubes provide a suitable environment for fertilization to take place.
A: Ureters - Incorrect, ureters are tubes that carry urine from the kidneys to the bladder, not involved in fertilization.
B: Urethra - Incorrect, the urethra is a tube that carries urine from the bladder out of the body, not involved in fertilization.
D: Ovaries - Incorrect, ovaries release eggs but fertilization does not occur in the ovaries; rather, it occurs in the uterine tubes.
The deferent duct joins with the ........ and forms.........:
- A. the seminal vesicle duct;
- B. the urethra;
- C. the ejaculatory duct;
- D. the epididymal duct;
Correct Answer: C
Rationale: The correct answer is C: the ejaculatory duct. The deferent duct, also known as the vas deferens, joins with the seminal vesicle duct to form the ejaculatory duct. This is where sperm from the testes and fluid from the seminal vesicles combine before entering the urethra during ejaculation. The other choices are incorrect because the seminal vesicle duct does not directly join with the deferent duct, the urethra is not formed by the deferent duct, and the epididymal duct is not involved in the formation of the ejaculatory duct.