QUESTION: 21

Which statement identifies the difference between a substance in liquid state and a substance in solid form?

more space exists between its molecules in a liquid state
the molecules contain more heat energy in its solid state
the molecules are less active in its liquid state
the molecules are large in its liquid state
the molecules are large in its solid state

Answer(s): A

The sugars and starches in the human diet are broken down into glucose in the digestive system. This glucose passes from the small intestine into the blood. Human blood glucose levels are regulated by two hormones produced by the Islets of Langerhans in the human pancreas. The hormones are insulin, which lowers the level of blood glucose, and glucagon, which raises it.
Which statement best describes what happens after one eats a meal high in sugar and starches?

The insulin level in the blood increases.
No hormonal changes occur.
The insulin level in the blood remains about the same.
The insulin level in the blood decreases.
The glucagon level in the blood increases.

Answer(s): A

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QUESTION: 23

Based on the diagram,

at which point is the least amount of force needed to move the weighted box?

The force should be applied at point
The force should be applied at point
The force should be applied at point
The force should be applied at point
The amount of force is not dependent on the distance from the weight to be lifted.

Answer(s): D

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