Explain what the core muscles do and why it's important to have a strong set of core muscles. Please help.

Which of these is a sexual stereotype? a) on average, males are taller than females. b) people over the age of 60 are not interested in sex. c) male hormone levels differ from those of females. d) there are more male representatives than female representatives in congress.

Cardiac output is affected by heart rate exercise stroke volume all of the above

Anti-smoking ads are an example of a) the influence of friends b) the influence of family c) the influence of media d) the influence of teachers