What advantage is there in having the special sensory organs confined to the head region?

• greater movement potential
• closer to the heart
• less effects from gravity
• rapid impulse transmission

Glaucoma is one of the primary causes of blindness in the United States. It’s not a single disease but rather a group of eye conditions leading to optic nerve damage and permanent blindness. Which of the following is a medical condition that would greatly increase a person’s risk of developing glaucoma?

• hypertension
• emphysema
• kidney stones
• alopecia

Hypertension is one of the causes that accelerates glaucoma.