Endocrine System
Gbogbo ọrọ náà
A goat that will not settle for the buck, a broiler that refuses to put on weight no matter how well it is fed, a dairy cow that grows thin and shaky just after calving: none of these problems can be seen by opening the animal up and looking for a damaged organ. The cause is chemical, not structural, and it is carried in the blood rather than along a nerve. A handful of small glands scattered through the body are quietly running the animal's growth, its metabolism, its response to fright and its readiness to breed, all by releasing tiny amounts of hormone straight into the bloodstream.
In this lesson you will meet the endocrine system: what it is, the five glands WAEC expects you to know, the hormone each one produces and what that hormone actually does in the body. You will also learn how this slower, blood-borne messenger system works together with the fast nervous system, and see how farmers put that knowledge to work, from regulating growth promoters to synchronising a whole herd's oestrus for one planned mating season.
Ebumnobi
- Define the endocrine system
- Identify the major endocrine glands in a farm animal
- State the hormones produced by the major endocrine glands
- Explain the functions of hormones in growth and reproduction
- Explain the relationship between the endocrine system and the nervous system
Akọmọ Ojú-ẹkọ
Yi rajista ka ci gaba
Kpọpụta akaụntụ n’efu ka ị nweta ohere na ihe ọmụmụ niile, ajụjụ omume, ma soro mmepe gị.
Ayẹwo Ẹkọ
Ekele diri gi maka imecha ihe karịrị na Endocrine System. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.
Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.
Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.
- Which gland is often called the master gland because it controls the activity of several other endocrine glands? A. Thyroid B. Pancreas C. Pituitary D. Adrenal Answer: C
- The hormone that mainly regulates the rate of metabolism in a farm animal is: A. Insulin B. Thyroxine C. Adrenaline D. Progesterone Answer: B
- Which hormone is released by the pancreas to lower blood glucose level? A. Glucagon B. Cortisol C. Insulin D. Oestrogen Answer: C
- The hormone chiefly responsible for maintaining pregnancy in a farm animal is: A. Oestrogen B. Progesterone C. Testosterone D. Adrenaline Answer: B
- Which endocrine gland releases its hormone within seconds of a frightening stimulus, acting directly under nervous control? A. Thyroid B. Pancreas C. Adrenal medulla D. Ovary Answer: C
Yi rajista ka ci gaba
Kpọpụta akaụntụ n’efu ka ị nweta ohere na ihe ọmụmụ niile, ajụjụ omume, ma soro mmepe gị.
Yi rajista ka ci gaba
Kpọpụta akaụntụ n’efu ka ị nweta ohere na ihe ọmụmụ niile, ajụjụ omume, ma soro mmepe gị.
