AP Psychology Unit 1 Review [Everything You NEED to Know]

Introduction to AP Psychology Unit One

  • Overview of the biological basis of behavior.

  • Importance of both biological systems in our physical and mental actions.

  • Encouragement to take notes during the video for better retention.

Nature vs. Nurture Debate

  • Historical perspective: Outdated view as nature vs. nurture.

  • Updated understanding: Nature and nurture both play significant roles.

    • Nature (Heredity): Involves the passing on of physical and mental traits.

    • Nurture: Refers to environmental factors such as family, social groups, education, and societal influences.

Psychological Perspectives on Nature and Nurture

  • Evolutionary Approach:

    • Based on Darwin's theory of evolution which emphasizes the role of heredity.

    • Concepts of natural selection: Beneficial traits survive and are passed on.

    • Misuse of these principles: E.g., eugenics movement.

  • Epigenetics:

    • Focus on how environmental factors influence gene expression.

    • Explains variability in identical twins raised apart (e.g., Minnesota study).

  • Family and Adoption Studies:

    • Longitudinal studies like the COL adoption project enhance understanding of genetics and environment on behavior.

Neuroplasticity vs. Epigenetics

  • Plasticity:

    • Refers to the brain's ability to change and adapt through experiences.

    • Involves strengthening or weakening neural connections based on learning.

Nervous System Overview

  • Central Nervous System (CNS):

    • Consists of the brain and spinal cord; sends out orders to the body.

  • Peripheral Nervous System (PNS):

    • Comprises nerves branching from the CNS to organs and muscles.

Types of Nerves

  • Afferent Neurons (Sensory Neurons):

    • Send signals to the CNS from sensory receptors.

  • Efferent Neurons (Motor Neurons):

    • Send signals from the CNS to the muscles and organs.

Parts of the Peripheral Nervous System

  • Somatic Nervous System:

    • Controls voluntary movements and sensory information (senses and skeletal muscle movements).

  • Autonomic Nervous System:

    • Manages involuntary activities essential for survival (e.g., heartbeat, digestion).

    • Divisions:

      • Sympathetic Division: Prepares body for action (fight or flight response).

      • Parasympathetic Division: Calms body (rest and digest).

Neurons and Neural Firing

  • Glial Cells:

    • Provide structure, insulation, communication, and waste transport; do not process information.

  • Neurons:

    • Basic functional units of the nervous system, communicate via electrical impulses and neurotransmitters.

Reflex Arc

  • Involves sensory neurons, interneurons, and motor neurons to create a rapid response to stimuli without conscious thought.

  • Example: Touching something hot triggers immediate withdrawal without processing details.

Neural Transmission Process

  • Emphasizes the process by which neurons communicate with each other and the importance of understanding neuron structures and functions.