Animal Husbandry WAEC

Endocrine System

Overzicht

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.

Doelstellingen

  1. Define the endocrine system
  2. Identify the major endocrine glands in a farm animal
  3. State the hormones produced by the major endocrine glands
  4. Explain the functions of hormones in growth and reproduction
  5. Explain the relationship between the endocrine system and the nervous system

Lesnotitie

A poultry farmer near Ibadan feeds two batches of chicks the same ration, yet one reaches table weight a week ahead of the other. A goat rearer in Sokoto cannot tell why one doe never comes on heat. Neither puzzle is solved at the feed trough: both trace back to the endocrine glands and the hormones they release, quietly governing growth, metabolism and reproduction from inside the animal.

Lesevaluatie

Gefeliciteerd met het voltooien van de les op Endocrine System. Nu je de sleutelconcepten en ideeën, het is tijd om uw kennis op de proef te stellen. Deze sectie biedt een verscheidenheid aan oefeningen vragen die bedoeld zijn om uw begrip te vergroten en u te helpen uw begrip van de stof te peilen.

Je zult een mix van vraagtypen tegenkomen, waaronder meerkeuzevragen, korte antwoordvragen en essayvragen. Elke vraag is zorgvuldig samengesteld om verschillende aspecten van je kennis en kritisch denkvermogen te beoordelen.

Gebruik dit evaluatiegedeelte als een kans om je begrip van het onderwerp te versterken en om gebieden te identificeren waar je mogelijk extra studie nodig hebt. Laat je niet ontmoedigen door eventuele uitdagingen die je tegenkomt; beschouw ze in plaats daarvan als kansen voor groei en verbetering.

  1. 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
  2. The hormone that mainly regulates the rate of metabolism in a farm animal is: A. Insulin B. Thyroxine C. Adrenaline D. Progesterone Answer: B
  3. Which hormone is released by the pancreas to lower blood glucose level? A. Glucagon B. Cortisol C. Insulin D. Oestrogen Answer: C
  4. The hormone chiefly responsible for maintaining pregnancy in a farm animal is: A. Oestrogen B. Progesterone C. Testosterone D. Adrenaline Answer: B
  5. 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

Aanbevolen Boeken

Introduction to Animal Science: Global, Biological, Social and Industry Perspectives
Introduction to Animal Science: Global, Biological, Social and Industry Perspectives
Ondertitel: Sixth edition
Uitgever: Pearson
Jaar: 2017
ISBN: 978-0-13-443605-0
Beschrijving: A comprehensive introduction to animal science covering anatomy and physiology, nutrition, genetics, reproduction, animal health and the major farm animal species and their production systems.
Small-scale Poultry Production: Technical Guide
Small-scale Poultry Production: Technical Guide
Uitgever: Food and Agriculture Organization of the United Nations
Jaar: 2004
ISBN: 978-92-5-105082-8
Beschrijving: An FAO Animal Production and Health Paper written by a Nigerian animal scientist, covering breeds, housing, feeding, incubation, disease control and marketing for small-scale poultry keepers in developing countries.
Tropical Animal Feeding: A Manual for Research Workers
Tropical Animal Feeding: A Manual for Research Workers
Uitgever: Food and Agriculture Organization of the United Nations
Jaar: 1995
ISBN: 978-92-5-103758-4
Beschrijving: An FAO Animal Production and Health Paper on the principles of ruminant and non-ruminant nutrition and the practical use of tropical feed resources, including crop residues and by-products, in sustainable livestock systems.