Unit 4 FRQ (Blood Sugar Homeostasis) Answers

AP Bio Free Response Question Answers for Blood Sugar Homeostasis

Setup

Questions with Answers & Rubric

(a) Identify the hormone that is nonfunctional or nonexistent in Type I diabetes patients.

• Insulin

• Homeostasis & Feedback Loops

(b) Describe the feedback loop utilized to return blood sugar levels to normal after a person consumes a food containing glucose, such as fruit, white rice or a piece of candy.

• Homeostasis & Feedback Loops

(c) Construct a graph that demonstrates the amounts of glucose and the hormone identified in Part A in a healthy person’s blood after consuming a food containing glucose, such as fruit, white rice, or a piece of candy.

• This should include equally spaced measurements, properly plotted data points, and correctly labeled x-y axes with independent and dependent variables.

(d) Hormone receptors on the liver trigger a signal transduction pathway that results in the uptake of glucose from the bloodstream, lowering blood sugar levels to safe amounts. This is because glucose is able to enter liver cells through transport proteins called GLUT, which open and close on command when triggered by the hormone receptors. Identify the type of cell transport that the GLUT protein uses.

• Facilitated diffusion

• Membrane Permeability (from Unit 2)
• Facilitated Diffusion (from Unit 2)

Next Steps

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