How does social pressure effect the family?
Social pressure effects every member of the family. The pressures can be internal or external, but may include divorce, adoption, religion, the media, money and time management.
Social support is the physical and emotional comfort given to us by family, friends, coworkers and others. Social support can turn to social pressure when your formerly trusted friends, in a way, force you to do something that you do not believe in or don't feel comfortable doing. Assert yourself and your beliefs, and if your friends truly respect you, they should stop pressuring.
Birth: the family you were born in. Later in life, a good education and a succesful career can take you up into a higher social class. But someone born into a socially high-end family will usually still be considered a member of his family's social class even if he or she is not much of an achiever.
What maneuver to increase the thoracic pressure illustrates the effect of external factors on the venous pressure?
Air pressure does not effect altitude, unless of course you are talking about the air pressure in a potato gun effecting the altitude the potato will reach. Altitude however does effect air pressure. The static air pressure at sea level is really the weight of all the air above you. At higher altitudes there is simply less air pressing on you.