Which of the following is NOT an accurate flexibility exercise guideline? - Choose flexibility exercises for all major muscle groups
- PNF and static stretching flexibility exercises are recommended for beginners
- No pain, no gain—feeling pain lets you know that you have overloaded the muscle with stretch
- Gradually increase the time you hold your stretches as well as the number of sets of stretches
- Avoid stretching muscles that are already overstretched from poor posture
- To get the most benefits from flexibility exercise, you need to warm up

The cardiovascular system, which transports blood through the body, is a one-way system. select the best answer from the choices provided. t f

Ab+cd-> ad+bc is what kind of reaction

A92-year-old man with a 45-year history of chronic obstructive pulmonary disease is intubated in the icu because of a bout of viral pneumonia that fails to improve after 72 hours of antibiotics. although the inspired fraction of oxygen is 100%, the patient's po2 remains at 57 mmhg. positive-end expiratory pressure (peep) is added to allow the inspired fraction of oxygen. twelve hours after the introduction of peep the patient suddenly become hypotensive. at the same time, his oxygen saturation drops from 92% to 61%. on physical examination, his bp is 80/50 mmhg and his pulse is 124/min. he has distended neck veins and distant heart sounds. which of the following would also most likely be seen on this patient's physical examination? - absence of breath sounds in the right hemithorax- high amplitude carotid artery upstroke- a pleural friction rub- pulsus alternans- splenomegaly