Posts Tagged ‘hormone’

Option H – Hormonal control

Friday, March 2nd, 2012

As we delve into Option H, we’ll be reviewing human biology concepts at the same time.  This first section is about hormonal control.  Hormones are chemical messengers secreted by endocrine glands into the blood and transported to specific target cells.  They can be steroids (eg progesterone, testosterone, estrogen), proteins (eg insulin, ADH, FSH, LH) and tyrosine derivatives (eg thyroxin).

You need to:-

  • Distinguish between the mode of action of steroid and protein hormones.
  • Outline the relationship between the hypothalamus and the pituitary gland.
  • Explain the control of ADH (vasopressin) secretion by negative feedback.

Another fantastic presentation here.  We’ll use this one too. Hormonal Control

How do you make a hormone?

Wednesday, November 2nd, 2011

Illu_endocrine_system from wikimedia commons

Ask Mr. Hobbins the answer to that one!

Next up is the Endocrine System, which consists of glands that produce hormones that travel in the bloodstream to various sites of action.  We’ll look at this from the perspective of coordination and control, so will be defining the term homeostasisand looking at examples of this in the body.

Questions we’ll tackle:

  • What is the endocrine system and how does it function?
  • What is homeostasis and how does it work?
  • How is body temperature is regulated?
  • How are blood glucose levels maintained?
  • What’s the difference between type I and type II diabetes?

Another great presentation from Mr Taylor.

Hormonal control

Thursday, March 25th, 2010

As we delve into Option H, we’ll be reviewing human biology concepts at the same time.  This first section is about hormonal control.  Hormones are chemical messengers secreted by endocrine glands into the blood and transported to specific target cells.  They can be steroids (eg progesterone, testosterone, estrogen), proteins (eg insulin, ADH, FSH, LH) and tyrosine derivatives (eg thyroxin).

You need to:-

  • Distinguish between the mode of action of steroid and protein hormones.
  • Outline the relationship between the hypothalamus and the pituitary gland.
  • Explain the control of ADH (vasopressin) secretion by negative feedback.

Another fantastic presentation here.  We’ll use this one too. Hormonal Control

Reproductive system

Monday, November 16th, 2009
egg-and-sperm-from-wellcome-images-on-flickr

egg-and-sperm-from-wellcome-images-on-flickr

No – it’s not a picture of a sunflower.  Look closely!

Here is what we will cover.  You will notice that it is not that extensive in terms of content.  HL students do a lot more.

  • Draw and label diagrams of adult male and female reproductive systems.
  • How do hormones control the menstrual cycle? (Link to Endocrine system)
  • Relate hormonal changes to thickening of uterine lining, ovulation and menstruation.
  • What are the roles of testosterone in males?
  • Explain the process of IVF and discuss the ethical issues associated with it.

A good presentation can be found here.  Some great videos on this unit have been produced by NOVA.  Watch in segments or all at once.

How do you make a hormone?

Thursday, November 12th, 2009
Illu_endocrine_system from wikipedia commons

Illu_endocrine_system from wikipedia commons

Ask Mr. Hobbins the answer to that one!

Next up is the Endocrine System, which consists of glands that produce hormones that travel in the bloodstream to various sites of action.  We’ll look at this from the perspective of coordination and control, so will be defining the term homeostasis and looking at examples of this in the body.

Questions we’ll tackle:

  • What is the endocrine system and how does it function?
  • What is homeostasis and how does it work?
  • How is body temperature is regulated?
  • How are blood glucose levels maintained?
  • What’s the difference between type I and type II diabetes?