One exercise myth would be- if you do a lot of crunches you will have "six pack" abs. This is incorrect because if you have fat on your stomach, the crunches will create muscle not burn fat.
Another exercise myth- muscles turn to fat when you stop exercising. This myth is not plausible because muscles are almost impossible to go away. Your muscles have muscle memory which makes it extra hard to "forget"!
Last exercise myth- strength training makes women muscular and unfeminine. This is not possible because strength training tests your endurance not how much you can lift. However, lifting weights would give you muscles! <3
Answer:
Forms of passage of substances across the blood–brain barrier. (A) Passive diffusion: fat-soluble substances dissolve in the cell membrane and cross the barrier (e.g., alcohol, nicotine and caffeine). Water-soluble substances such as penicillin have difficulty in getting through.
A it varies from state to state
B . Push blood from the vertices to the arteries , and ventricles push blood from the veins to the atria
