6 - Social & Human Sciences Department (SAHSD) Centre...

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PHD 0015 Human Development ONLINE NOTES FOSEE , MULTIMEDIA UNIVERSITY (436821-T) MELAKA CAMPUS, JALAN AYER KEROH LAMA, 75450 MELAKA, MALAYSIA. Tel 606 252 3594 Fax 606 231 8799 URL: http://fosee.mmu.edu.my/~asd/ (SAHSD) Centre for Foundation Studies and Extension Education (FOSEE)
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PHD0015 HUMAN DEVELOPMENT Chapter 6 PHD 0015 HUMAN DEVELOPMENT CHAPTER 6 ADOLESCENCE Definition Adolescence: Developmental transition between childhood and adulthood entailing major physical, cognitive, and psychosocial changes. Physical Development Four chief physical manifestations of puberty (Marshall, 1978) 1. 2. The development of primary sex characters. 3. The development of secondary sex characters. 4. Changes in body composition. Puberty: The End of Childhood Puberty is the process by which a person attains sexual maturity and the ability to reproduce. It begins with a sharp increase in production of sex hormones. Endocrine glands secreted hormones directly into the bloodstream. Hormones act as an internal communication system. In human sexuality, there are 3 important glands involved : 1. The Pituitary Gland. Small gland - about one inch long, less than half a gram, located in the skull at the base of the brain. Important Pituitary Hormones : i. HGH (Human Growth Hormone): Affects the growth and shaping of the skeleton. Excess causes giantism, deficiency causes dwarfism. ii. Gonadotropic Hormones. They influence the gonads, or sex glands. There two gonadotropic hormones: FSH (Follicle - Stimulating Hormone ) and LH (Luteinizing Hormone). FSH and LH control the production and release of female sex hormones by the ovary. LH in male control the production and release of sex hormones by the testes. iii. LTH (Luteotropic Hormone). __________________________________________________________________________________ SRS
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PHD0015 HUMAN DEVELOPMENT Chapter 6 Containing the hormone prolactin, which stimulates the secretion of milk by the mammary glands of the breast. 2. The Gonads Also known as sex glands, secrete a number of sex hormones. The ovaries in females secrete: i. Estrogen Stimulate the development of female sex characteristics; breast, pubic hair, fat, size and function of the uterus, vagina, nasal and oral mucous membranes, growth of breast tissue, influence uterine contractions, maintain physical and mental health. ii ii. Progesterone Produced by a new cell growth called corpus luteum (yellow body which forms under the stimulus of LH) about thirteen days following ovulation. If ovum is not fertilized, corpus luteum disintegrates and the secretion of progesterone is ceased until the ovulation occurs again in the cycle.
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This note was uploaded on 10/30/2010 for the course FOSEE CVL1040 taught by Professor None during the Spring '09 term at Multimedia University, Cyberjaya.

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6 - Social & Human Sciences Department (SAHSD) Centre...

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