Nokea
Foetal portion of placenta includes
- A. Decidua parietalis
- B. Chorion frondosum
- C. Decidua basalis
- D. Anchoring villi
Correct Answer: B
Rationale: The correct answer is B: Chorion frondosum. The foetal portion of the placenta is formed by the chorion frondosum, which consists of the chorionic villi that develop from the trophoblast. These villi are involved in the exchange of nutrients and waste products between the mother and the foetus.
A: Decidua parietalis is the maternal portion of the placenta, not the foetal portion.
C: Decidua basalis is also part of the maternal portion, not the foetal portion.
D: Anchoring villi are structures that help anchor the placenta to the uterine wall, but they are not specific to the foetal portion.
In summary, the correct answer is B because the chorion frondosum is specifically responsible for the foetal part of the placenta, while the other choices refer to maternal components or structures not directly related to the foetal portion.
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The female reproductive system includes the following structures:
- A. ovary;
- B. Fallopian tubes;
- C. vagina;
- D. vulva;
Correct Answer: A
Rationale: The correct answer is A: ovary. The female reproductive system includes the ovaries, which are responsible for producing eggs and hormones like estrogen and progesterone. The Fallopian tubes are passageways for eggs to travel from the ovaries to the uterus, not a part of the system itself. The vagina is the birth canal and where sperm enters during intercourse, but it is not a reproductive organ. The vulva includes external genitalia like the labia and clitoris, but it is not a reproductive structure. Therefore, the ovary is the only structure directly involved in the reproductive process.
Infants of mothers who had adequate nutrition during pregnancy do not require iron supplements or a diet rich in iron until about 3 months of age. Why is this?
- A. Growth of the infant does not require iron until after the 3rd month
- B. The fetal liver stores enough iron to meet the infant’s needs until the third month
- C. Synthesis of new red blood cells begins after 3 months
- D. Muscle cells that develop before the 3rd month do not contain myoglobin
Correct Answer: B
Rationale: The correct answer is B: The fetal liver stores enough iron to meet the infant’s needs until the third month. During pregnancy, the fetus accumulates iron stores in the liver from the mother, which can sustain the infant's iron needs for the first few months of life. This stored iron is gradually utilized by the infant as the maternal iron supply diminishes post-birth.
Explanation of why the other choices are incorrect:
A: Growth of the infant does require iron even in the early months for various metabolic processes and functions.
C: Synthesis of new red blood cells starts shortly after birth, not necessarily after 3 months.
D: Myoglobin is not directly related to iron supplementation needs in infants and is unrelated to the timing of iron supplementation requirements.
The nurse correlates which factor to an increased risk of endometrial cancer in women with early menarche or late menopause?
- A. Total number of ovulatory cycles
- B. Less hormone stimulation
- C. Need for estrogen replacement in these patients
- D. Extended duration of the menstrual cycle in these patients
Correct Answer: A
Rationale: The correct answer is A: Total number of ovulatory cycles. Early menarche and late menopause lead to a longer reproductive period, resulting in more ovulatory cycles. Increased exposure to estrogen due to more ovulatory cycles is a risk factor for endometrial cancer. Choice B is incorrect as more hormone stimulation, not less, contributes to the risk. Choice C is irrelevant as estrogen replacement therapy is not mentioned in the question. Choice D is incorrect as the duration of the menstrual cycle is not directly linked to the increased risk of endometrial cancer in these women.
The normal site of fertilization is:
- A. the uterus
- B. the vagina
- C. the ureter
- D. the oviduct
Correct Answer: D
Rationale: The correct answer is D: the oviduct. Fertilization occurs in the oviduct, specifically in the ampulla region. Sperm meets the egg in the oviduct where fertilization takes place. The other choices, A: the uterus, B: the vagina, and C: the ureter, are incorrect because fertilization does not occur in these locations. The uterus is where the fertilized egg implants and develops into a fetus. The vagina is the passage for sperm to enter the reproductive system. The ureter is a tube that connects the kidney to the bladder, and is not involved in fertilization.
Recording the strength of muscle contraction as a result of electrical stimulation is known as _________.
- A. Electromyograph
- B. Electroencephalography
- C. Electromyography
- D. Electroencephalography
Correct Answer: C
Rationale: Rationale for Correct Answer (C):
1. Electromyography (EMG) specifically measures muscle contraction strength.
2. It involves placing electrodes on the skin to record electrical activity produced by muscles.
3. EMG is commonly used in clinical and research settings to assess muscle function and diagnose neuromuscular disorders.
Summary of Incorrect Choices:
A. Electromyograph: Incorrect term, should be "Electromyography".
B. Electroencephalography: Measures brain activity, not muscle contraction.
D. Electroencephalography: Same as choice B, measures brain activity, not muscle contraction.