In humans placenta is established by:
Correct answer: B. Progesterone
- A. Hypothalamus
- B. Progesterone
- C. Thalamus
- D. Estrogen
Explanation
The placenta is an organ that develops in the uterus during pregnancy. Progesterone, known as the "pregnancy hormone," is crucial for the establishment and maintenance of pregnancy and does play a significant role in placental development.
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About Coordination and Control
Coordination depends on receptors, neurons, synapses and nerve impulses, with reflex actions traced through the reflex arc and the roles of major brain regions. Chemical coordination covers endocrine glands and hormones, including how hormones regulate growth, metabolism, reproduction and internal balance, unlike rapid nervous control.
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