It depends on the person! If they are handicapped they may face physical challenges (example) stairs for someone in a wheelchair. Someone sitting in a long lecture when they have ADD. Anything really
I think the flat hard surface is to ensure that the patients arm will not move when the needle is administered since it is usually critical that the needle is inserted in the correct vein which is only a fine target requiring careful positioning of the needle.
An important similarity between a sub-lethal dose and a lethal dose is, they both produce adverse affect to which the dose is applied. However, they differ on the level of toxin or noxious substance causing adverse reaction. So, lethal dose causes an organism to die while in the sub-lethal, the dose is not quite enough to cause death.
Answer:
the dentist could say it will make her more confident in herself and help with eating and taking care of her teeth would make it so her doesn't ever hurt
False, actually phytate & oxalate decrease calcium absorption.
