Insect neuroendocrine cells in brain affected by environmental factor. Many different hormones involved in metamorphosis. Vein doesn't go to heart. Psychosocial dwarfism in deprived kids. Thyroid hormones needed for normal GH secretion, sex hormones at puberty Pituitary dwarfs - not enough GH made, normal intelligence and proportion.
Thyroid hormones increase metabolic rate In the neck, below larynx.
Retarded mental and physical development Hypothyroidism can be treated by giving hormones Hyperthyroidism increases metabolic rate. Antibodies bind to TSH receptors, always stimulated. Inhibits glycogen mobilization Glucagon raises blood glucose levels. Negative feedback, with antagonistics action of insulin, glucagon. Immune system attacks beta cells.