EASY 10 points!?!?! SCIENCE Q's?

Question

1. Blood vessels help regulate your body's temperature. When it's hot, your blood vessels ____ to increase blood flow and release heat.

A:constrict

B:cool down

C:expand

2. The ____ muscle contracts about 70 times per minute.

A:cardiac

B:skeletal

C:smooth

D:none of the above

3. Red blood cells are produced in _____ in the bone.

A:cartilage

B:periosteum

C:red marrow

D:yellow marrow

4. Is it more difficult for a person to maintain balance with his or her eyes opened or closed? Why?

Answer 1

1 - c

2 - a

3 - c

open - you see from both eyes giving you better perspective.  closing your eye, and still moving can make you sick.  you get car/sea/air sick because you're looking at the car/water/plane, but cannot see any movement.  in the case of sea sickness, if you're only looking at the sky and laying on your back, you see the same thing no matter if you're moving or not.

white blood cells are produced in yellow marrow as well!

Answer 2

if you don't do your OWN homework you're never going to learn

Answer 3

1: A

2: A

3: C

4: Closed  Because sight allows you to orient yourself