Which of the following pairs of hormones are not antagonistic (having opposite effects) to each other?
1. Insulin Glucagon
2. Aldosterone Atrial Natriuretic Factor
3. Relaxin Inhibin
4. Parathormone Calcitonin
Notochord develops from embryonic:
1. ectoderm
2. mesoderm
3. endoderm
4. archenteron
Chorion in terrestrial vertebrate embryos:
| 1. | prevents desiccation of the embryo |
| 2. | helps in the exchange of oxygen and carbon dioxide with the environment |
| 3. | perform excretory functions |
| 4. | acts as a shock absorber |
In humans, the majority of the placenta is formed by:
1. allantois
2. amnion
3. chorion
4. yolk sac
The functions of the placenta include:
| I: | Acts as an excretory organ. |
| II: | Acts as a respiratory organ. |
| III: | Acts as an endocrine organ. |
| 1. | I and II only | 2. | I and III only |
| 3. | II and III only | 4. | I, II, and III |

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Human bones develop from embryonic:
1. ectoderm
2. endoderm
3. epiderm
4. mesoderm
Human lungs develop from embryonic:
1. ectoderm
2. endoderm
3. epiderm
4. mesoderm
Human nervous system is derived from embryonic:
1. ectoderm
2. endoderm
3. epiderm
4. mesoderm
Milk ejection or milk letdown is a function of:
| 1. | progesterone | 2. | prolactin |
| 3. | oxytocin | 4. | dopamine/PIH |
Milk secretion by mammary glands is under the control of:
| 1. | oxytocin | 2. | prolactin |
| 3. | estrogen | 4. | progesterone |