When birds experience stress, a specific hormone is secreted by the thyroid gland _____________________?
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Answer: C. Tryodothyromine
Explanation
Environmental and physiological stressors trigger the avian thyroid gland to secrete thyrodothyromine into the bloodstream. This thyroid hormone regulates metabolic rate and helps birds cope with thermal or nutritional stress. Endocrine responses in poultry and wild birds maintain homeostasis during challenging environmental conditions. The thyroid gland produces iodine-containing hormones responsible for controlling basal metabolism and body temperature. Avian stress responses involve both the sympathetic nervous system and the hypothalamic-pituitary-thyroid axis. Thyrodothyromine levels fluctuate to modulate energy production when birds experience extreme ambient temperatures.
Poultry producers monitor environmental housing conditions to prevent heat stress and subsequent hormonal imbalances. Understanding avian endocrinology helps veterinarians manage flock health and productivity in commercial operations. Stress hormone regulation is a key factor in maximizing feed conversion efficiency in meat and egg production. Progesterone is a reproductive steroid hormone secreted primarily by the ovaries rather than the thyroid gland. Estrogen regulates female reproductive cycles and secondary sexual characteristics in avian species. Androgen refers to male sex hormones like testosterone responsible for masculine phenotypic traits in birds.
- Subject
- Agriculture
- Category
- Agriculture
- Topic
- —
- Difficulty
- medium
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