Endocrine System
Akopọ
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.
Awọn Afojusun
- 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
Akọ̀wé Ẹ̀kọ́
Forúkọsílẹ̀ láti Tẹ̀síwájú
Ṣẹda àkọọlẹ ọfẹ kan láti wọlé sí gbogbo àwọn oríṣìíríṣìí ìkànsí ikẹ́kọ̀ọ́, àwọn ìbéèrè ìdánwò, àti láti tọpa ìlọsíwájú rẹ.
Ìdánwò Ẹ̀kọ́
Oriire fun ipari ẹkọ lori Endocrine System. Ni bayi ti o ti ṣawari naa awọn imọran bọtini ati awọn imọran, o to akoko lati fi imọ rẹ si idanwo. Ẹka yii nfunni ni ọpọlọpọ awọn adaṣe awọn ibeere ti a ṣe lati fun oye rẹ lokun ati ṣe iranlọwọ fun ọ lati ṣe iwọn oye ohun elo naa.
Iwọ yoo pade adalu awọn iru ibeere, pẹlu awọn ibeere olumulo pupọ, awọn ibeere idahun kukuru, ati awọn ibeere iwe kikọ. Gbogbo ibeere kọọkan ni a ṣe pẹlu iṣaro lati ṣe ayẹwo awọn ẹya oriṣiriṣi ti imọ rẹ ati awọn ogbon ironu pataki.
Lo ise abala yii gege bi anfaani lati mu oye re lori koko-ọrọ naa lagbara ati lati ṣe idanimọ eyikeyi agbegbe ti o le nilo afikun ikẹkọ. Maṣe jẹ ki awọn italaya eyikeyi ti o ba pade da ọ lójú; dipo, wo wọn gẹgẹ bi awọn anfaani fun idagbasoke ati ilọsiwaju.
- 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
Forúkọsílẹ̀ láti Tẹ̀síwájú
Ṣẹda àkọọlẹ ọfẹ kan láti wọlé sí gbogbo àwọn oríṣìíríṣìí ìkànsí ikẹ́kọ̀ọ́, àwọn ìbéèrè ìdánwò, àti láti tọpa ìlọsíwájú rẹ.
Forúkọsílẹ̀ láti Tẹ̀síwájú
Ṣẹda àkọọlẹ ọfẹ kan láti wọlé sí gbogbo àwọn oríṣìíríṣìí ìkànsí ikẹ́kọ̀ọ́, àwọn ìbéèrè ìdánwò, àti láti tọpa ìlọsíwájú rẹ.
