The tissue that refracts light rays as they enter the eye is called the ________

Acquired disorders of the vascular system including senile purpura, Cushing's syndrome, corticosteroid therapy, and scurvy have one condition in common. Which of the following best describes this condition?

a. Decreased amount of supportive connective tissue in the blood vessel walls b. Presence of abnormal proteins in the vascular system c. Inflammation of the small blood vessels d. Increased pressure within the lumen of capillaries after intense exercise

If you have been exposed to an HIV-positive patient's blood, you should:

A. not worry about it, because transmission rates are low. B. seek medical advice as soon as possible. C. wait until your next doctor visit to seek evaluation. D. wash the area thoroughly and get an updated tetanus shot.