1. keep them in larval stage
2. hasten their metamorphosis
3. slow down their metamorphosis
4. kill the tadpoles
hasten their metamorphosis
1. Simmond’s disease
2. cretinism
3. Hashimoto’s disease
4. myxoedema
Hashimoto’s disease
1. pituitary
2. thyroid
3. parathyroid
4. pineal
pituitary
1. Leydig’s cells
2. Sertoli’s cells
3. Spermatogonia
4. Both and (b)
Leydig’s cells
1. testes
2. adrenals
3. pituitary
4. ovary
ovary
1. pituitary
2. adrenal
3. thyroid
4. adrenal medulla
pituitary
1. Ca2+ deficiency
2. Na+ deficiency
3. K+ deficiency
4. parathormone hypersecretion
parathormone hypersecretion
1. adrenaline
2. corticoids
3. ACTH
4. Insulin
corticoids
1. dorsal part of diencephalon
2. ventral part of diencephalon
3. ventral side of cerebellum
4. lateral side of cerebrum
dorsal part of diencephalon
1. continue to respond to hormone
2. not respond to hormone
3. continue to respond but requires higher concentration
4. continue to respond but in the opposite way
not respond to hormone