--- title: "Unit 1 – Biological Bases of Behavior - AP Psychology" description: "Review Unit 1 – Biological Bases of Behavior for AP Psychology with Fiveable study guides and practice resources." canonical: "https://fiveable.me/ap-psych-revised/unit-1" type: "unit" subject: "AP Psychology" unit: "Unit 1 – Biological Bases of Behavior" --- # Unit 1 – Biological Bases of Behavior - AP Psychology ## Overview Unit 1 – Biological Bases of Behavior ## Study Guides - [1.1 Interaction of Heredity and Environment](/ap-psych-revised/unit-1/1-interaction-of-heredity-and-environment/study-guide/K7DZeZixZvfWKSxV) - [1.2 Overview of the Nervous System](/ap-psych-revised/unit-1/2-overview-of-the-nervous-system/study-guide/4EFLv8T9ARX14r9M) - [1.3 The Neuron and Neural Firing](/ap-psych-revised/unit-1/3-the-neuron-and-neural-firing/study-guide/AVvPhAH234j4u83J) - [1.4 The Brain](/ap-psych-revised/unit-1/4-the-brain/study-guide/zffu0vU5m7HwEMsU) - [1.5 Sleep](/ap-psych-revised/unit-1/5-sleep/study-guide/qpkX61RMlTEfmjbA) - [1.6 Sensation](/ap-psych-revised/unit-1/6-sensation/study-guide/AqnAHVH2Nu3Kj5jb) ## FAQs ### What topics are covered in AP Psych Unit 1? AP Psych Unit 1: Biological Bases of Behavior covers 6 topics: Interaction of Heredity and Environment, Overview of the Nervous System, The Neuron and Neural Firing, The Brain, Sleep, and Sensation. Together they explain how the brain and biological systems shape every behavior and mental process you'll study all year. See the full topic breakdown at [AP Psych Unit 1](/ap-psych-revised/unit-1). ### How much of the AP Psych exam is Unit 1? AP Psych Unit 1: Biological Bases of Behavior makes up 15-25% of the AP exam, making it one of the heavier-weighted units. That means roughly 12-16 multiple-choice questions could come from topics like the brain, neuron and neural firing, sleep, and sensation. It's worth putting real time into this unit early. ### What's on the AP Psych Unit 1 progress check (MCQ and FRQ)? The AP Psych Unit 1 progress check in AP Classroom includes both MCQ and FRQ sections drawn from all 6 unit topics: Interaction of Heredity and Environment, Overview of the Nervous System, The Neuron and Neural Firing, The Brain, Sleep, and Sensation. MCQs test concept recognition across these topics, while the FRQ asks you to apply and connect them, often centering on how the brain or neural firing explains a behavior. For matched practice questions that mirror the progress check format, visit [AP Psych Unit 1](/ap-psych-revised/unit-1). ### How do I practice AP Psych Unit 1 FRQs? AP Psych Unit 1 FRQs most often ask you to explain how the brain, neuron and neural firing, or the interaction of heredity and environment connects to a real-world behavior or scenario. The question type is typically a concept application prompt where you define a term and then use it to explain something specific. To practice, write out short responses to scenario-based prompts for each of the 6 topics, then check that every sentence directly answers the prompt without drifting. You can find Unit 1 FRQ practice at [AP Psych Unit 1](/ap-psych-revised/unit-1). ### Where can I find AP Psych Unit 1 practice questions? The best place to find AP Psych Unit 1 practice questions, including multiple-choice and practice test sets, is [AP Psych Unit 1](/ap-psych-revised/unit-1). That page has MCQs and FRQs covering all 6 topics: the brain, neuron and neural firing, sleep, sensation, the nervous system, and heredity and environment. Running through unit-specific MCQ sets is the fastest way to spot which topics need more review before a full practice test. ### How should I study AP Psych Unit 1? Start AP Psych Unit 1 by building a clear mental map of how the brain and nervous system work before moving to the finer details. Here's a practical order that works well: 1. **Interaction of Heredity and Environment** first, since it frames why biology matters for behavior at all. 2. **Overview of the Nervous System and The Neuron and Neural Firing** together, so you understand how signals travel before you study where they go. 3. **The Brain** next, mapping major structures to their functions using labeled diagrams. 4. **Sleep and Sensation** last, applying what you know about neural firing to explain how these processes work. For each topic, write a one-sentence plain-English explanation, then test yourself with MCQs at [AP Psych Unit 1](/ap-psych-revised/unit-1). Since this unit is 15-25% of the exam, returning to it periodically throughout the year pays off. ## Structured Data ```json {"@context":"https://schema.org","@type":"FAQPage","inLanguage":"en","mainEntity":[{"@type":"Question","@id":"https://fiveable.me/ap-psych-revised/unit-1#what-topics-are-covered-in-ap-psych-unit-1","name":"What topics are covered in AP Psych Unit 1?","acceptedAnswer":{"@type":"Answer","text":"AP Psych Unit 1: Biological Bases of Behavior covers 6 topics: Interaction of Heredity and Environment, Overview of the Nervous System, The Neuron and Neural Firing, The Brain, Sleep, and Sensation. Together they explain how the brain and biological systems shape every behavior and mental process you'll study all year. See the full topic breakdown at AP Psych Unit 1."}},{"@type":"Question","@id":"https://fiveable.me/ap-psych-revised/unit-1#how-much-of-the-ap-psych-exam-is-unit-1","name":"How much of the AP Psych exam is Unit 1?","acceptedAnswer":{"@type":"Answer","text":"AP Psych Unit 1: Biological Bases of Behavior makes up 15-25% of the AP exam, making it one of the heavier-weighted units. That means roughly 12-16 multiple-choice questions could come from topics like the brain, neuron and neural firing, sleep, and sensation. It's worth putting real time into this unit early."}},{"@type":"Question","@id":"https://fiveable.me/ap-psych-revised/unit-1#whats-on-the-ap-psych-unit-1-progress-check-mcq-and-frq","name":"What's on the AP Psych Unit 1 progress check (MCQ and FRQ)?","acceptedAnswer":{"@type":"Answer","text":"The AP Psych Unit 1 progress check in AP Classroom includes both MCQ and FRQ sections drawn from all 6 unit topics: Interaction of Heredity and Environment, Overview of the Nervous System, The Neuron and Neural Firing, The Brain, Sleep, and Sensation. MCQs test concept recognition across these topics, while the FRQ asks you to apply and connect them, often centering on how the brain or neural firing explains a behavior. For matched practice questions that mirror the progress check format, visit AP Psych Unit 1."}},{"@type":"Question","@id":"https://fiveable.me/ap-psych-revised/unit-1#how-do-i-practice-ap-psych-unit-1-frqs","name":"How do I practice AP Psych Unit 1 FRQs?","acceptedAnswer":{"@type":"Answer","text":"AP Psych Unit 1 FRQs most often ask you to explain how the brain, neuron and neural firing, or the interaction of heredity and environment connects to a real-world behavior or scenario. The question type is typically a concept application prompt where you define a term and then use it to explain something specific. To practice, write out short responses to scenario-based prompts for each of the 6 topics, then check that every sentence directly answers the prompt without drifting. You can find Unit 1 FRQ practice at AP Psych Unit 1."}},{"@type":"Question","@id":"https://fiveable.me/ap-psych-revised/unit-1#where-can-i-find-ap-psych-unit-1-practice-questions","name":"Where can I find AP Psych Unit 1 practice questions?","acceptedAnswer":{"@type":"Answer","text":"The best place to find AP Psych Unit 1 practice questions, including multiple-choice and practice test sets, is AP Psych Unit 1. That page has MCQs and FRQs covering all 6 topics: the brain, neuron and neural firing, sleep, sensation, the nervous system, and heredity and environment. Running through unit-specific MCQ sets is the fastest way to spot which topics need more review before a full practice test."}},{"@type":"Question","@id":"https://fiveable.me/ap-psych-revised/unit-1#how-should-i-study-ap-psych-unit-1","name":"How should I study AP Psych Unit 1?","acceptedAnswer":{"@type":"Answer","text":"Start AP Psych Unit 1 by building a clear mental map of how the brain and nervous system work before moving to the finer details. Here's a practical order that works well: 1. **Interaction of Heredity and Environment** first, since it frames why biology matters for behavior at all.\n2. **Overview of the Nervous System and The Neuron and Neural Firing** together, so you understand how signals travel before you study where they go.\n3. **The Brain** next, mapping major structures to their functions using labeled diagrams.\n4. **Sleep and Sensation** last, applying what you know about neural firing to explain how these processes work. For each topic, write a one-sentence plain-English explanation, then test yourself with MCQs at AP Psych Unit 1. Since this unit is 15-25% of the exam, returning to it periodically throughout the year pays off."}}]} ```