draf waktu peksa biology spm 2012


di atas ialah cadangan masa untuk peperiksaan m/p biologi spm 2012...tarikh blom ada. maklumlah draf untuk kali ke-3

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SPM KIAN HAMPIR

 Salam sejahtera semua... Lagi beberapa hari murid-murid tingkatan 5 akan menghadapi peperiksaan keramat iaitu Peperiksaan Sijil Pelajaran Malaysia. Pejam celik- pejam celik.... telah lima tahun meniti persekolahan menengah. Bertabahlah anak-anak... zaman ini penuh cabaran. Apa-apapun selamat menduduki peperiksaan.... semua yang terbaik menanti anda.
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Sugar Homeostasis

Imej
The body requires of glucose in order to create ATP. Two hormones are responsible for controlling the concentration of glucose in the blood. These are insulin and glucagon. The diagram illustrates the principle of negative feedback control in action involving blood sugar levels. Diabetes Diabetes insipidus is a condition where excess urine is excreted caused by the sufferers  inability  to  produce  ADH and promote the retention of water. Diabetes Mellitus is another form of diabetes where the sufferer does not have the ability to produce sufficient insulin, meaning that glucose cannot be converted into glycogen. Anyone who has this condition usually has to take injections of insulin after meals and snacks to maintain their storage of glucose needed in emergencies.
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The Human Endocrine System

Endocrine gland Main hormone Function Pituitary gland Growth hormone (GH) • Controls growth Antidiuretic hormone (ADH) • Stimulates the reabsorption of water in the kidneys (osmoregulation) Follicle-stimulating hormone (FSH) • Stimulates the formation of egg follicles in the ovary & the formation of sperms in the testes. Luteinising hormone (LH) • Brings about ovulation Thyroid-stimulating hormone (TSH) • Stimulates the thyroid gland to produce thyroxine. Endocrine gland Main hormone Function Thyroid gland Thyroxine • Control growth • Controls the rate of metabolism Testis (plural : testes) Androgen • Stimulates the development & maturation of the testes • Controls the development of male secondary sexual characteistics Adrenal gla...
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