If both ovaries are removed from the rat, which hormone is decreased in the blood?
Correct answer: C. Oestrogen
- A. Oxytocin
- B. Prolactin
- C. Oestrogen
- D. Gonadotropin releasing factor
Explanation
The ovary secretes two hormones: Oestrogen before ovulation and progesterone after ovulation. Oxytocin and prolactin are pituitary hormones and the gonadotropin-releasing factor is secreted by the hypothalamus of the brain to stimulate the pituitary for the secretion of gonadotropic hormones.
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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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