Nervous System Animations

McGrawHill is an American publisher and provides excellent animations covering different aspects of neurobiology. This is a brilliant resource to understand the dynamics of biological processes related to neurons or the nervous system. All animations provide a narrative (check your vocabulary!) and a quiz to test your knowledge.

The Nerve Impulse

A Companion Website for the textbook Neuroscience (the chapter animations are useful)

Action Potential Propagation

Electric Signalling

Voltage Gated Channels and the Action Potential

Chemical Synapse 

Transmission Across a Synapse

Another useful resource for independent learning is

Neurons (Medical Education, University of Toronto)

 

The Resting Potential

Independent learning resources to study the dynamics of the resting potential (maintaining and generating the resting potential:

http://www.sumanasinc.com/webcontent/animations/content/electricalsignaling.html

http://neurons.med.utoronto.ca/index.swf

 

 

Human Evolution: A Comparison of the Genus Australopithecus and Homo

Explore these interactive timelines to

// Team A: compare characteristics of the genus Australopithecus and the genus Homo. In doing so, define criteria for your comparison by yourselves.

// Team B: Sum up the development from early hominins to Homo Sapiens based on the interactive timelines.

Timeline 1: Origins of Humankind

Timeline 2: Human Evolution Timeline

If you have time, you can also explore this interactive documentation for further independent learning: Becoming Human: an Interactive Documentary

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Human Evolution: Making Sense of Ancient DNA

In May 2008, a pinky bone was found in a cave in Siberia (Wikipedia: Denisova Cave) and soon news reports enthusiastically claimed to have found a new human. Soon scientists had to revise their hypothesis and thinking due to new modern state-of-the-art molecular analysis, which lead to updates in the evidence for events in human history twice: in 2010 and 2015.

Team A:

Briefly sum up the significance of the discovery in the Denison Cave and explain the difference between the initial and recent classification of the discovery.

Team B:

You do not need a summary of the discovery, as you’ve already dealt with the topic in your  last exam and prepared to present the topic in class.

Your tasks are:

Explain the difference between the initial and recent classification of the discovery and outline how the method of PCR (Polymerase Chain reaction) can be useful in the investigation.

Here are the links to today’s resources:

Human evolution (Evolution 101, University of Berkeley).

Making sense of hominin DNA.

PCR animation I (Team B only)

PCR animation II (Team B only)

PCR information III (Team B only)

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Bio Q2: What is Evolution? What is NOT Evolution?

These three podcasts are taken from a series Evolution 101 by Zachary Moore, available on iTunes.

Listen to one of the podcasts and sum up the essential information on the questions. Then, get together in teams of three and discuss the biological dimensions of evolution. You make notes and can sum up your discussion in class.

What is Evolution?

What is not Evolution?

What is evidence against evolution?

Synaptic Transmission

Synapses communicate the signal transmitted by action potentials from one neuron to the next in neuronal pathways. In this individual learning exercise, you will explore the cellular processes occurring during the transmission of a signal at a synapse.

Work with a partner in this activity.

First, choose and study the given animations and narratives (easy  challenging).

Then, divide the process of synaptic transmission up into logical units and explain in detail what happens during each step.

The Chemical Synapse at McGraw Hill

Crossing the Divide; How Neurons Talk to Each Other at LearnGenetics, University of Utah

Synaptic Transmission at an online supplement of a medical textbook: Neuroscience

 

Coevolution- An Evolutionary Arms Race

One passage in Lewis Carrol’s „Through the Looking Glass, and what Alice Found There“ (1871, sequel to Alice’s Adventures in Wonderland“) has been picked up and used as an analogy for evolutionary processes:

Well, in our country,‘ said Alice, still panting a little, ‚you’d generally get to somewhere else—if you ran very fast for a long time, as we’ve been doing.‘

‚A slow sort of country!‘ said the Queen. ‚Now, here, you see, it takes all the running you can do, to keep in the same place. If you want to get somewhere else, you must run at least twice as fast as that!‘

The Red Queen Hypothesis suggests a constant evolutionary arms race: there are constant interactive selection pressures on  involved organisms leading to evolutionary change: coevolution.

Here are the links to the materials we used in class:

Evolutionary arms race (film)

Evolutionary arms race (materials and exercises)

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Modern Evolutionary Synthesis – Evolution Before our Eyes

As we have combined the ideas of many biological disciplines to a theory of modern evolutionary synthesis, we can apply this theory to evolutionary events that occur right before our eyes:  for example, the evolution of antibiotic resistance.

Watch this animation: Mutation- Selection: The Bacteria Resist

Furthermore, read „The Evolution of Antibiotic resistance“ on page 115 in your workbook.

Then evaluate in detail to what extend parts of the modern synthetic theory of evolution can be applied. Also explain why this example displays „evolution before our eyes“.

 

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