Resistance Phase in AP Psychology

In AP Psychology, the resistance phase is the second stage of Hans Selye's General Adaptation Syndrome (GAS). It comes after the alarm reaction, and the body stays physiologically aroused (elevated stress hormones like cortisol) to confront and adapt to an ongoing stressor.

What is the Resistance Phase?

The resistance phase is the middle stage of the General Adaptation Syndrome (GAS), Hans Selye's three-step model of how your body handles stress. The CED lays it out simply. First comes the alarm reaction, when you encounter the stressor and your fight-flight-freeze response kicks in. Then comes the resistance phase, when the stress is confronted. Last comes the exhaustion phase, when the stress subsides or your resources run out.

Think of the resistance phase as your body settling in for a long fight. The initial panic spike of the alarm reaction fades, but your body doesn't go back to normal. Stress hormones such as cortisol stay elevated, and your energy goes toward coping with the stressor. On the outside you may look like you're handling it fine. On the inside you're running on borrowed fuel, and that bill comes due in the exhaustion phase.

Why the Resistance Phase matters in AP® Psychology

The resistance phase lives in Topic 5.1 Introduction to Health Psychology (Unit 5: Mental and Physical Health). It directly supports AP Psych 5.1.C, which asks you to explain how reactions to stress apply to behavior and mental processes, and the GAS is named right in that essential knowledge. It also backs up AP Psych 5.1.B, because the resistance phase is how stress gets linked to physical problems like hypertension, headaches, and immune suppression. Your body can't stay in fight mode forever without paying for it. The big exam idea is that the resistance phase is the bridge between a short-term stress reaction and long-term health effects. If you understand what's happening here, you understand why the exhaustion phase is when illness hits hardest.

How the Resistance Phase connects across the course

General Adaptation Syndrome and the Exhaustion Phase (Unit 5)

The resistance phase only makes sense as part of the GAS sequence. It's the stage that spends your resources, and the exhaustion phase is what happens when the account hits zero. That's why the CED says the greatest susceptibility to illness comes during exhaustion, not resistance.

Fight-or-Flight Response and Cortisol (Units 1, 5)

Fight-or-flight is the alarm reaction's quick burst. Cortisol is part of what keeps the body revved up during resistance. If you know how the nervous and endocrine systems produce arousal, you know the machinery the resistance phase keeps running long after the initial scare.

Chronic Stress, Daily Hassles, and ACEs (Unit 5)

A single stressor might pass through resistance quickly. Daily hassles that build up, or adverse childhood experiences that last for years, can keep someone stuck in resistance for a long time. That prolonged stay is what turns stress into the hypertension and immune suppression named in 5.1.B.

Coping Strategies (Unit 5)

The resistance phase is literally when the stress is being confronted, so it's where coping happens. Problem-focused coping (fixing the stressor) and emotion-focused coping (deep breathing, meditation) can shorten or soften this stage before it slides into exhaustion.

Is the Resistance Phase on the AP® Psychology exam?

Most questions test the resistance phase by its position in the GAS sequence, so you need to place a scenario at the right stage. Fiveable practice questions show the common angles. One asks which physiological pattern marks the move from resistance to exhaustion (sustained arousal giving way to depleted resources). Another asks which phase shows the most compromised immune response (exhaustion, not resistance). A third describes marathon runners who get respiratory infections in the weeks after a race, a classic "resources spent" example. Intervention questions, like designing support for emergency responders, reward answers that keep people from staying in prolonged resistance until they burn out.

On free-response, the 2017 SAQ Q2 built a scenario around Sachio, a music student whose scholarship audition got pushed to late in the day. That's exactly the setup where you apply GAS stages to a real situation. To earn the point, don't just name the resistance phase. Tie it to what Sachio is doing or feeling during the wait (staying keyed up and pushing through the stress) so the application is explicit.

The Resistance Phase vs Exhaustion Phase

Both come after the alarm reaction, and both involve long-lasting stress, so they blur together. In the resistance phase, your body is still actively fighting and adapting, and arousal stays high. In the exhaustion phase, the stress has ended or your resources are used up, and that is when you're most likely to get sick. A quick test helps. If the person is still pushing through, it's resistance. If they've crashed or caught a cold afterward, it's exhaustion.

Key things to remember about the Resistance Phase

• The resistance phase is the second of three stages in Hans Selye's General Adaptation Syndrome, coming after the alarm reaction and before the exhaustion phase.

• During the resistance phase, the body stays physiologically aroused, with elevated stress hormones like cortisol, as it confronts an ongoing stressor.

• The resistance phase is not when illness risk peaks; the CED says the greatest susceptibility to illness occurs in the exhaustion phase.

• Staying in the resistance phase for a long time, as with chronic stress or daily hassles, drains the body's resources and helps explain stress-related problems like hypertension and immune suppression.

• Coping strategies, both problem-focused and emotion-focused, are used during the resistance phase and can help prevent a slide into exhaustion.

• On the exam, identify the resistance phase in a scenario by looking for someone actively pushing through a stressor while still feeling wound up.

Frequently asked questions about the Resistance Phase

What is the resistance phase in AP Psychology?

It's the second stage of Selye's General Adaptation Syndrome. After the alarm reaction, the body stays aroused and keeps stress hormones like cortisol elevated so it can confront and adapt to the stressor.

Are you most likely to get sick during the resistance phase?

No. The CED states that the greatest susceptibility to illness occurs during the exhaustion phase, after resources are spent. The resistance phase is when the body is using up those resources, which sets the stage for illness later, like marathon runners catching colds in the two weeks after a race.

What's the difference between the resistance phase and the exhaustion phase?

In resistance, you're still actively fighting the stressor with high arousal. In exhaustion, the stress has ended or your resources have run out, and that's when your body is most vulnerable to disease.

How is the resistance phase different from the alarm reaction?

The alarm reaction is the immediate fight-flight-freeze spike when you first meet a stressor. The resistance phase is the longer, steadier stretch that follows, when your body keeps arousal elevated to deal with the stressor over time.

Is the resistance phase on the AP Psych exam?

Yes. It's part of the GAS in learning objective AP Psych 5.1.C, and the 2017 SAQ Q2 used a stress scenario about a rescheduled music audition where you could apply the GAS stages. Expect MCQs that ask you to place a scenario at the correct GAS stage.