All fruits that ripen in response to ethylene exhibit a characteristic respiratory rise before the ripening phase called a climacteric.

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#Unit 7. System Physiology – Animal

Granulosa cells have FSH receptors 

Theca cells have LH receptors

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#Unit 7. System Physiology – Animal

FSH stimulates aromatase in the granulosa cells

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#Unit 7. System Physiology – Animal

LH stimulates cholesterol desmolase in the theca cells

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#Unit 7. System Physiology – Animal

In the granulosa cells,

All the androgens and much of the progesterone

are converted into estrogens by the enzyme aromatase

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#Unit 7. System Physiology – Animal

Theca cells synthesize and secrete progesterone.

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#Unit 7. System Physiology – Animal

Three estrogens are present in the plasma of the human female: 

1β-estradiol

 Estrone

Estriol