No. As handsonanatomist mentions it has to do with blood flow to the myocardium(heart muscle itself). The heart muscle itself only receives oxygen during diastole(relaxation), but as heart rate increases the relative length of diastole shortens compared to systole(heart contraction). TLDR; your heart gets tired because it only gets oxygen while relaxed, and the relative amount of time spent relaxing is less.
Mind vs Brain. Though mind and brain are two terms that are understood to mean the same when used in the colloquial sense, there is a difference between mind and brain. There is certainly some difference between the two in their making. Brain is made of physical matter while mind is not made of physical matter. To be more elaborate brain is made up of cells, blood vessels and nerves to name a few. Mind is nothing but the thought that resides in the brain.
6 Answers 6. Surprisingly, I don't see in the other answers what i consider the real difference between REST and CRUD: what does each one manages. CRUD means the basic operations to be done in a data repository. You directly handle records or data objects; apart from these operations, the records are passive entities. Typically it's just database tables and records. REST, on the other hand, operates on resource representations, each one identified by an URL.