Anatomy?????

Summer: Anatomy?????
1)If someone has poor color vision, which cells in the body are affected?
2) What is the difference between cross section of an artery, and vein, and a capillary?
3)How does caffeine affect a person’s heart rate and blood pressure?

please answer the ones you know!!! I really need to know!!

Answers and Views:

Answer by health buff
1) CONES of the eye.

2) In the order you wrote…thick, thinner, thinnest

3) Increases heart rate AND blood pressure.

Answer by ak_aquastar
caffeine raises ur heart rate & ur blood pressure. i don’t know about the other ones though

Answer by Ella
1)Normal color vision requires the use of specialized receptor cells called “cones”, which are located in the retina of the eye. There are three types of cones, red, blue, and green, which enable people to see a wide spectrum of colors. An abnormality, or deficiency, of any of the types of cones will result in abnormal color vision.

2)Structurally speaking veins and artery are the same. They are larger, thicker, and more sturdy than capillaries. This is due to the fact that they have a large transport capacity then capillaries. Their difference is veins carry venus (De-oxygenated) blood while arteries carry oxygenated blood. Capillaries are the tinier branches of veins and arteries.They must branch into tiny vessels to reach your cells.

3)Caffeine boosts blood pressure, heart rate and stress levels enough to increase a person’s risk of developing heart disease over a lifetime of moderate caffeine consumption.
The more caffeine you consume during the day in coffee, tea or soft drinks, the higher your blood pressure is likely to be.