Category Archives: Hormones
Are you replacing sleep with food? DBQ practice.
I came across this through Ed Yong’s weekly linklist, but @SciCurious often writes really interesting posts (Neurotic Physiology) on neurobiology. This one is particularly relevant to #IBBio students for a few reasons. First, you guys are up way too late, way too often. Second, it connects directly to our course – read this blog post (based on this paper), especially students working on option A: Nutrition, or anyone reviewing hormonal control.
Finally it is ripe for data-based question practice.
These graphs click-through to the originals posted at SciCurious’s blog. Here are some DBQ-style questions you might ask:
- Calculate the difference in post-dinner snack energy intake between having a ‘normal’ 9h sleep and the sleep-deprived 5h condition.
- Compare the trend in energy expenditure throughout the day between 9h sleep and 5h sleep.
- Describe the difference between 9h sleep and 5h in terms of eating patterns.
- Evaluate the hypothesis that “when we sleep less, we eat more” based on the data provided and information in the article.
- Explain the role of the appetite control centre of the brain on appetite, and suggest how it is affected by the conditions of the experiment.
Appetite Control: from the Wellcome Trust (‘The Anatomy of Appetite’ explainer page here).
So there you go – you learned something.
Get to bed. And leave the snacks in the fridge.
Digestion (Further Human Physiology) Linklist
Download it here: digestionfhp.ppt
Let’s start with the basics:
Simple Digestion animation by kitses.com
And don’t forget the excellent review materials at Click4Biology.
Fetal pig digestive system virtual dissection from Whitman College
Control of digestive juice secretion:
Straight to the Point McGraw Hill (their page on types of glands is also very helpful)
Gastric acid production by parietal cells (advanced – look at ‘normal’ only) – John Hopkins
Another Gastric acid animation (over-detailed) PPIKnow Pharmacology website
Digestion of lipids:
Good animation from Wiley.com
Control of bile secretion (advanced) from ZeroBio.com
I’m still looking for animations for the other subtopics. If you find any, let me know!
Hormonal Control – linklist
Donwload the powerpoint here: hormonal_control.ppt
Here’s a good simple overview of steroids and peptides – Wisconsin Online
Old school overview of the endocrine system:
Mode of action of steroid hormones:
Clear explanation from McGraw Hill
Mode of action of peptide steroids:
Short video, but clear – UC Davis
Mode of action of thyroxine:
Negative feedback and thyroxin secretion:
Control of the pituitary – Leif Saul (Biology in Motion – very good)
Control of ADH Secretion:
Too simple, but good overview – BBC GSCE Bitesize
Focus on the kidney (reviewing the effect of ADH) – BiologyMad
Other useful links: