Indiana Science HS-AP8-6

ScienceGrades 9–12Transport, Blood and the Cardiovascular System

The Standard

Construct a model of hypertension to model the regulation of the cardiac cycle.

Indiana Academic Standards for Science (2023) · Transport, Blood and the Cardiovascular System

Teacher's field guide

What This Standard Means

What Students Need to Do

Students build a model of the heart pumping against increased resistance in the arteries. They show filling, contraction, ejection, and relaxation. They explain how pressure sensors can briefly change heart rate and pumping strength.

What Mastery Looks Like

A student can identify when the ventricle fills and when it ejects blood. They can show why higher artery pressure makes ejection harder and explain why a short-term response may not end lasting hypertension.

Common Misconceptions

Students may think high blood pressure always means a fast pulse, or that artery pressure falls to zero between beats. They may also think one high reading confirms lasting hypertension.

How to Assess It

Give students a sketch of a heart pumping into a partly narrowed tube. Ask them to label filling and ejection, then write one sentence about how the narrowing changes the heart's work.

Lesson moves

Ways to Teach It

  1. Use a squeeze bottle, water, tubing, and a binder clip to compare the effort needed to pump through open and partly pinched tubing.

  2. Ask students to write: Why might a slower heart rate not fix blood pressure that stays high?

  3. Have pairs order cards labeled ventricular filling, valve closure, ejection, and relaxation, then mark where high artery pressure affects pumping.

  4. Show readings of 118/76 and 146/94; have students identify systolic and diastolic values and choose which reading needs a repeat check.

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