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Question 1
Incorrect
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All of the following statements regarding human chorionic gonadotrophin are true except::
Your Answer: Reaches a peak concentration in maternal serum by 10 weeks gestation
Correct Answer: It's level doubles every 48 hours in ectopic pregnancy
Explanation:In normal pregnancy the levels of hCG doubles after every 48-72 hours but in case of ectopic pregnancy the levels of hCG are lower than the normal. It is produced by the placenta and its main role is nourishment of the egg after implantation. Its levels reached a peak at 8-10 weeks of pregnancy and after that the levels decreases for the remainder of pregnancy. In hydatiform mole and trophoblastic diseases its the main hormone for diagnosis of the disease because the levels are highly elevated.
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This question is part of the following fields:
- Physiology
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Question 2
Incorrect
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Which of the following would normally be expected to increase during pregnancy:
Your Answer:
Correct Answer: Thyroxin-binding globulin
Explanation:Thyroid function in pregnancy is altered in two ways; the circulating levels of the thyroid binding proteins are increased, resulting in an increase in the total circulating levels of thyroid hormones (but a slight fall in the free component).
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This question is part of the following fields:
- Physiology
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Question 3
Incorrect
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Which one of the following statements regarding oestrogen is correct?
Your Answer:
Correct Answer: It is produced in the corpus luteum
Explanation:Oestrogen is secreted by the corpus luteum and is responsible for the proliferation of the endometrium to prepare it for the implantation of the zygote.
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This question is part of the following fields:
- Physiology
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Question 4
Incorrect
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What form is 99% of body calcium found in?
Your Answer:
Correct Answer: Calcium Phosphate
Explanation:Calcium phosphate salts are the most abundant form of calcium in the body, making up 99%. The majority of these salts are stored in the skeleton in different forms, mostly, hydroxyapatite, a lattice-like crystal composed of calcium, phosphates and hydroxide. The remaining calcium can be found in the extracellular fluid, tissues and skeletal muscle.
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This question is part of the following fields:
- Physiology
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Question 5
Incorrect
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What is the primary form of haemoglobin in a 6 week old foetus?
Your Answer:
Correct Answer: Hb Gower 1
Explanation:HB gower 1 is the predominant embryonic haemoglobin when the foetus is 6 weeks old and is replaced by adult haemoglobin by the age of 5 months post natally.
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This question is part of the following fields:
- Physiology
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Question 6
Incorrect
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A 25 year old primigravida with a regular cycle had her last menstrual period on June 30th. Therefore the expected date of delivery (EDD) is approximately when the following year:
Your Answer:
Correct Answer: 7-Apr
Explanation:Expected date of delivery (EDD) is a calculated from the first day of the woman’s last menstrual period. If her periods are regular i.e., 28-day menstrual cycle, Naegele’s rule may be used. Naegele’s rule involves a simple calculation: add seven days to the first day of your LMP and then subtract three months. e.g. 30 June + 7 days = 7 July, minus 3 months = 7 April.
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This question is part of the following fields:
- Physiology
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Question 7
Incorrect
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What is the typical volume increase of a non-pregnant uterus to term uterus?
Your Answer:
Correct Answer: 10ml to 5000ml
Explanation:Uterine blood flow increases 40-fold to approximately 700 mL/min at term. The uterus is 50–60 g with a volume of approximately 10ml prior to pregnancy and 1000 – 1200 g with a volume of 5000ml by term.
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This question is part of the following fields:
- Physiology
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Question 8
Incorrect
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What is the most common cause of hypercalcaemia?
Your Answer:
Correct Answer: Primary hyperparathyroidism
Explanation:Primary hyperparathyroidism is the most common cause of hypercalcemia. It is usually caused by a tumour of the parathyroid gland. Symptoms are related to increased calcium levels which can cause kidney stones, abdominal groans, psychiatric overtones and bones disease such as osteoporosis,osteomalacia and arthritis.
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This question is part of the following fields:
- Physiology
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Question 9
Incorrect
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We can detect the fetal heart beat by Sonography (transvaginal) at:
Your Answer:
Correct Answer: 6 weeks
Explanation:The earliest fetal heart rate detected transvaginally was at 6 weeks 0 days of gestation compared with 7 weeks 0 days transabdominally. The transvaginal Doppler method was also more successful in detecting the fetal heart rate in women with a retroverted uterus (p < or = 0.01).
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This question is part of the following fields:
- Physiology
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Question 10
Incorrect
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Serum prolactin levels are greatest in which of the following conditions?
Your Answer:
Correct Answer: Suckling
Explanation:Serum prolactin levels are increased during suckling. Some other conditions in which serum prolactin is increased consist of: prolactin secreting brain tumours, anti psychotic drugs and hypothyroidism. It can also be increased in pregnancy, nipple stimulation and stress.
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This question is part of the following fields:
- Physiology
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