Q. No.Within the fetus, much of the circulating blood bypasses the lungs and flows through the ______________.
1. ductus venosus
2. umbilical vein
3. umbilical artery
4. ductus arteriosus
1. ductus venosus
2. umbilical vein
3. umbilical artery
4. ductus arteriosus
The developing embryo gets implanted on the wall of uterine endometrium at the stage of:
1. gastrula
2. blastocyst
3. morula
4. zygote
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Erythropoiesis in the earliest days of gestation is the function of:
| 1. | yolk sac | 2. | chorion |
| 3. | fetal bone marrow | 4. | amnion |
A second pregnancy during an ongoing pregnancy is prevented by:
| 1. | Estrogen | 2. | HPL |
| 3. | progesterone | 4. | HCG |
The most critical period of gestation where the fetus is most vulnerable to genetic birth defects from drugs taken by the mother is:
| 1. | last trimester | 2. | third to sixth month |
| 3. | first trimester | 4. | a week prior to parturition |
Implantation does not:
1. involve a blastocyst
2. occur in the uterine tube
3. establishes pregnancy
4. occurs by seventh-eighth day
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Seminal plasma has contributions of all the following except:
1. bulbourethral glands.
2. testes.
3. seminal vesicles.
4. prostate gland
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Type B spermatogonia divide to form:
| 1. | Type A spermatogonia. | 2. | spermatids. |
| 3. | a primary spermatocyte. | 4. | a secondary spermatocyte |
Identify the cell that can be seen in primordial, primary, secondary and tertiary follicle :
| 1. | oogonium | 2. | primary oocyte |
| 3. | secondary oocyte | 4. | ovum |
The number of mature ova produced by a young, healthy, nonpregnant adult woman each year would be:
| 1. | 0 | 2. | 6 |
| 3. | 12 | 4. | 24 |
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