top of page

6.6 Hormones, homeostasis and reproduction

IB Syllabus Statements

Understandings:

  • Insulin and glucagon are secreted by β and α cells of the pancreas respectively to control blood glucose concentration.

  • Thyroxin is secreted by the thyroid gland to regulate the metabolic rate and help control body temperature.

  • Leptin is secreted by cells in adipose tissue and acts on the hypothalamus of the brain to inhibit appetite.

  • Melatonin is secreted by the pineal gland to control circadian rhythms.

  • A gene on the Y chromosome causes embryonic gonads to develop as testes and secrete testosterone.

  • Testosterone causes pre-natal development of male genitalia and both sperm • production and development of male secondary sexual characteristics during puberty.

  • Estrogen and progesterone cause pre-natal development of female reproductive organs and female secondary sexual characteristics during puberty.

  • The menstrual cycle is controlled by negative and positive feedback mechanisms involving ovarian and pituitary hormones.

​

Applications and skills:

  • Application: Causes and treatment of Type I and Type II diabetes.

  • Application: Testing of leptin on patients with clinical obesity and reasons for the failure to control the disease.

  • Application: Causes of jet lag and use of melatonin to alleviate it.

  • Application: 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.

  • Application: William Harvey’s investigation of sexual reproduction in deer.

  • Skill: Annotate diagrams of the male and female reproductive system to show names of structures and their functions.

Videos

Homeostasis (Part 1)

Reproductive Systems and the Menstrual Cycle

Homeostasis (Part 2)

In Vitro Fertilization IVF

Treatments for Type I and Type II Diabetes

Quizlet yourself!

Flashcards

Learn

Test

We're Hexagon-na make connections!

Topic 6.6 Hormones, homeostasis and reproduction HookED SOLO Hexagons

Topic 6.6 Hormones, homeostasis and reproduction SSaQ (Syllabus Statement as Questions)

  • Explain how William Harvey was hampered in his observational research into reproduction by lack of equipment, especially the microscope.

  • Explain where insulin and glucagon are secreted, and their role in controlling blood glucose concentration.

  • Explain where thyroxin is secreted and its role in controlling metabolic rate and body temperature.

  • Explain where leptin is secreted, where it acts, and it's role in inhibiting appetite.

  • Explain where melatonin is secreted and its role in controlling circadian rhythms.

  • Outline how embryonic gonads develop into testes, and the hormone it secretes.

  • Outline the role of testosterone in males during puberty, and estrogen and progesterone in females during puberty.

  • Explain how the menstrual cycle is controlled by negative and positive feedback mechanisms, and the roles of FSH, LH, estrogen, and progesterone.

  • Compare the causes and treatment of Type I and Type II diabetes.

  • Explain how the leptin of patients with clinical obesity is tested, and reasons for the failure to control the disease.

  • Outline how hormones are used in a variety of therapies.

  • Explain the causes of jet lag, and how melatonin is used to alleviate it.

  • Outline the use of drugs in IVF to suspend normal hormone secretion, and the use of artificial doses of hormones to induce superovulation and establish a pregnancy.

  • Explain William Harvey’s investigation of sexual reproduction in deer.

  • Explain how you would annotate diagrams of the male and female reproductive system, showing names and functions of structures.

bottom of page