Saturday, 3 September 2016

IB Biology Newsletter/September

Our first topic is ''Human Physiology''. This unit covers the subtopics and practical skills listed below.

Nature of science

  • Developments in scientific research follow improvements in apparatus


  • Antagonistic role of insulin and glucagon in control of blood glucose concentration.
  • Role of hyroxin hormone in metabolic rate and body temperature regulation.
  • Inhibition of appetite by leptin hormone.
  • Melatonin is secreted by the pineal gland to control circadian rhythms.
  • Rol of testosterone in pre-natal development of male genitalia and development of secondary sexual characteristics during puberty.
  • Role of estrogen and progesterone in pre-natal development of female reproductive organs and female secondary sexual characteristics during puberty.
  • Regulation of the menstrual cycle through positive and negative feedback regulation.

Applications and skills

  • Causes and treatment of Type I and Type II diabetes.
  • Testing of leptin on patients with clinical obesity and reasons for the failure to control the disease.
  • Causes of jet lag and use of melatonin to alleviate it.
  • The use in IVF of drugs to suspend the normal secretion of hormones, followed by the use of artificial doses of hormones to induce superovulation and establish a pregnancy.
  • William Harvey’s investigation of sexual reproduction in deer.

IB Biology students working together to figure out the antagonistic regulation of blood sugar.

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