| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.25 |
| Score | 0% | 65% |
The __________ nervous system regulates involuntary activity in the heart, stomach, and intestines.
somatic |
|
central |
|
peripheral |
|
autonomic |
Part of the peripheral nervous system, the autonomic nervous system regulates involuntary activity in the heart, stomach, and intestines.
Leafy vegetables, beans, potatoes, fruits, and whole grains are good sources of:
fiber |
|
protein |
|
unsaturated fat |
|
saturated fat |
Fiber provides bulk to help the large intestine carry away waste. Good sources of fiber are leafy vegetables, beans, potatoes, fruits, and whole grains.
Convert 5C° to F°.
37 |
|
-23 |
|
27 |
|
41 |
To convert from C° to F° use:
\(F° = {9 \over 5}C° + 32\)
\(F° = {9 \over 5}(5) + 32\)
\(F° = {45 \over 5} + 32\)
\(F° = 9 + 32 = 41\)
Which of the following would be used in eye glasses to correct nearsightedness?
concave mirror |
|
concave lens |
|
convex lens |
|
convex mirror |
Unlike curved mirrors that operate on the principle of reflection, lenses utilize refraction. A convex lens is thicker in the middle than on the edges and converges light while a concave lens is thicker on the edges than in the middle and diffuses light. A common use for curved lenses is in eye glasses where a convex lens is used to correct farsightedness and a concave lens is used to correct nearsightedness.
Which of the following is not a method of heat transfer?
conduction |
|
radiation |
|
convection |
|
reflection |
Heat is always transferred from warmer to cooler environments through conduction, convection, or radiation.