At lower concentrations of activin, genes were not activated, and the “default” gene expression instructed the cells to become blood vessels and heart.

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#Unit 7. System Physiology – Animal

Hyperthyroidism Thyrotoxicosis

Graves’ Disease Toxic Goiter

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#Unit 7. System Physiology – Animal

Hypothyroidism Autoimmune thyroiditis TSH deficiency

I- deficiency

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#Unit 7. System Physiology – Animal

The cells of the adrenal cortex contain large amounts of smooth endoplasmic reticulum, which is involved in the steroid-forming process

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#Unit 7. System Physiology – Animal

The hormones of the adrenal 

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#Unit 7. System Physiology – Animal

The adrenal cortex secretes three classes of steroid hormones: Glucocorticoids Mineralocorticoids Androgens

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#Unit 7. System Physiology – Animal

The innermost zone of the cortex, zona reticularis, and the middle zone, zona fasciculata, synthesize and secrete glucocorticoids and adrenal androgens.