Homework # 4, Due 9/17/09

Homework #4

Name ____________________________________________ Due 9/17/09

Base your answers to questions 50 through 54 on the information below and on your

knowledge of biology.

In a test for diabetes, blood samples were taken from an individual

every 4 hours for 24 hours. The glucose concentrations were recorded

and are shown in the data table below.

Blood Glucose Level Over Time

Time (h)	Blood Glucose Concentration (mg/dL)
0	100
4	110
8	128
12	82
16	92
20	130
24	104

50 State one likely cause of the change in blood glucose concentration between hour 16

and hour 20. [1]

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Directions (51 and 52): Using the information given, construct a line graph on the grid

on the next page, following the directions below.

51 Mark an appropriate scale on the axis labeled “Blood Glucose Concentration (mg/dL).”

[1]

52 Plot the data from the data table. Surround each point with a small circle and connect

the points. [1]

Blood Glucose Concentration Over Time

Time (h)

53 How might these results be different if this individual was not able to produce

sufficient levels of insulin?

(1) The level of blood glucose would be constant.

(2) The average level of blood glucose would be lower.

(3) The maximum level of blood glucose would be higher.

(4) The minimum level of blood glucose would be lower.

54 The chemical that is responsible for the decrease in blood glucose concentration is

released by

(1) muscle cells

(2) guard cells

(3) the ovaries

(4) the pancreas

55 Many plants can affect the growth of other plants near them. This can occur when one plant produces a chemical that affects another plant. Design an experiment to determine if a solution containing ground-up goldenrod plants has an effect on the growth of radish seedlings. In your experimental design be sure to:

• state a hypothesis to be tested [1]

• describe how the experimental group will be treated differently from the control

group [1]

• explain why the number of seedlings used for the experiment should be large [1]

• identify the type of data that will be collected [1]

• describe experimental results that would support your hypothesis [1]

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