What is a true statement about muscles?

a.
cardiac muscles are voluntary.

b.
skeletal muscles are involuntary.

c.
all muscles move involuntarily.

d.
skeletal muscles move in pairs.

How do the uv rays cause damage?   what exactly causes the skin to burn;   can you be more specific about this mechanism?   3. how do photosensitive medications increase a person's sensitivity to sunlight and therefore increase their risk of getting burned?     what kind of medications can increase photo-sensitivity, can you think of some examples?

Why should you to explore different careers at this point in your life

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.