1.2.4 Fertilization

Now that we have considered the production of gamete cells, including the process of meiosis, we can examine the next stage of reproduction, the process of fertilization, which occurs inside the female's reproductive tract. As fertilization occurs, the successful sperm stops swimming and a change takes place in the egg cell membrane, which prevents any other sperm from fusing with it. The nucleus of the sperm cell is injected into the cytoplasm of the egg cell. The chromosomes of the fertiliz
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

2.2 Introducing the Durrants

The Arthur and Lynne case study

We will be focusing on a single case study, about Arthur and Lynne Durrant. This enables us to explore some broad questions about care, carers and caring which might be quite boring and divorced from real life if they were presented in the abstract – as official stat
Author(s): The Open University

License information
Related content

Copyright © 2013 The Open University

Tips on Applying for A Job
This video offers tips on how one should apply for jobs. (02:32)
Author(s): No creator set

License information
Related content

Kinect Common Bridge v2 Beta now available

With the coming release of the Kinect for Windows v2 device, which you can pre-order now, we should start seeing more of our favorite frameworks, utilities and tools being updated.

We've highlighted Kinect Common Bridge a couple times before, Kids, Kinect, Cinder and some C++ too... Meet the Kinect Common Bridge, Author(s): Greg Duncan

1.2 Extracellular signals can act locally or at a distance

First we shall consider the general types of intercellular signalling mechanism within multicellular organisms (Figure 3). Broadly speaking, cells may interact with each other directly, requiring cell–cell contact, or indirectly, via molecules secreted by one cell, which are then carried away to target cells.


Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

Doomed soldiers : Polish underground soldiers 1944-1963 : the untold story
The website "The Doomed Soldiers. Polish Underground Soldiers 1944-1936: The Untold Story" is a project dedicated to the Polish Underground organisations that fought against the Nazi and Soviet occupations. There are several sections: Historical Background; Soldiers; and Units and Operations. The Historical Background offers a vast array of information on the anticommunist armed fight in the underground. Numerous cases are described, with contemporary official documents; propaganda; press releas
Author(s): No creator set

License information
Related content

Evolving board evaluation fuctions for a complex strategy game
The development of board evaluation functions for complex strategy games has been approached in a variety of ways. The analysis of game interactions is recognized as a valid analogy to common real-world problems, which often present difficulty in designing algorithms to solve them. Genetic programming, as a branch of evolutionary computation,provides advantages over traditional algorithms in solving these complex real-world problems in speed, robustness and flexibility. This thesis attempts to a
Author(s): Anthony, Lisa Patricia

License information
Related content

Rights not set

OZK 150: Introduction to Ozarks Studies - Lecture 10: Ozarks Music
In this lecture Dr. Blevins surveys Ozarks traditional music, concentrating on varieties of ballads from ancient British story songs brought to America by colonial immigrants to regional songs recounting events that took place in the Ozarks. This course provides a multidisciplinary introduction to the study of the Ozarks region and its inhabitants, including Ozarks history and geography, regional folk culture and traditions, and current issues. Learn more about Missouri State iCourses at http:
Author(s): No creator set

License information
Related content

Keep on learning

Study another free course

There are more than 800 courses on OpenLearn for you to c
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

18.098 Street-Fighting Mathematics (MIT)
This course teaches the art of guessing results and solving problems without doing a proof or an exact calculation. Techniques include extreme-cases reasoning, dimensional analysis, successive approximation, discretization, generalization, and pictorial analysis. Applications include mental calculation, solid geometry, musical intervals, logarithms, integration, infinite series, solitaire, and differential equations. (No epsilons or deltas are harmed by taking this course.) This course is offere
Author(s): Mahajan, Sanjoy

License information
Related content

Content within individual OCW courses is (c) by the individual authors unless otherwise noted. MIT OpenCourseWare materials are licensed by the Massachusetts Institute of Technology under a Creative C

US Marines Battle of Iwo Jima
(This is newsreel footage.) The battle was marked by some of the fiercest fighting of the campaign. The Imperial Japanese Army positions on the island were heavily fortified, with vast bunkers, hidden artillery, and 18 kilometers (11 mi) of tunnels. The battle was the first American attack on the Japanese Home Islands and the Imperial soldiers defended their positions tenaciously. Of the 21,000 Japanese soldiers present at the beginning of the battle, over 20,000 were killed and only 216 taken p
Author(s): No creator set

License information
Related content

Battle For Stalingrad
A brief history of the Soviet/German battle for the city of Stalingrad.  This video shows footage of the final stage of Operation Barbarosa.   The German commander of the Sixth Army, General von Paulus, assisted by the Fourth Panzer Army, began it's attack of a small Russian city on the banks of the Volga River. (3:14)

Author(s): No creator set

License information
Related content

3.2 Utility theory

Utility theory is based on this assumption of rationality and describes all decision outcomes (financial and otherwise) in terms of the utility (or value) placed on them by individuals. Within this framework, decisions can be understood in terms of rationally ordered levels of utility attached to different outcomes.

Bazerman (2001, pp.3–4), for example, describes a formally rational decision process for arriving at a decision with the greatest expected utility in the following terms:<
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

The Art and Craft of Inspired Writing (Charles Johnson)
Literary leader Charles Johnson didn't ask to become famous, his characters just begged to be unleashed. This University of Washington professor of creative writing and author of "Middle Passage" joins Upon Reflection host Marcia Alvar in a 1991 interview about character development, critical reactions and the effects of literature on greater society.
Author(s): No creator set

License information
Related content

Season 1 – Lesson 22 – Coffee Break Spanish
Coming up in this episode: In this week’s lesson of Coffee Break Spanish, Mark and Kara talk about booking into hotels and asking for specific types of rooms. Please note that lesson 22 of Season 1 was originally known as lesson 122 of Coffee Break Spanish. We have renumbered the lessons of each season as […]
Author(s): radiolingua

License information
Related content

Rights not set

Ecological Validity of Real Scale Models
Space simulation is a technique employed by architects, urban designers, environmental psychologists and other related specialists. It is used for academic and research purposes, as an aid to evaluate the impact that the built environment or that to be built would yield in potential or real users. Real Scale Model is organized as one of the models which represents more reliable spatial characteristics in space simulations. However, it is necessary to know the ecological validity of the simulat
Author(s): Abadi Abbo, Isaac and Cavallin Calanche, Humerto

License information
Related content

Rights not set

What Is an Electrical Inverter?
An electrical inverter is a device that can create an alternating
current from a direct current, allowing the current to go backwards and forwards instead of in only one direction. Find out how an electrical inverter works from a science teacher in this
video.

Author(s): No creator set

License information
Related content

Virtual Maths - Numbers, 2D Elipse simulation tool
Interactive simulation tool demonstrating formula for calculating the area of an elipse
Author(s): Leeds Metropolitan University

License information
Related content

http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

Duke Medicine Profiles: Michael R. Harrison, MD
Get to know Duke's cancer doctors.
Author(s): No creator set

License information
Related content