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Questions and Answers
What is the role of the sodium-potassium pump in the neuron?
What is the role of the sodium-potassium pump in the neuron?
During the absolute refractory period, what prevents the neuron from firing another action potential?
During the absolute refractory period, what prevents the neuron from firing another action potential?
What is the primary source of nourishment for vertebrate neurons?
What is the primary source of nourishment for vertebrate neurons?
What is the function of the myelin sheath in nerve cells?
What is the function of the myelin sheath in nerve cells?
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What is the difference between the absolute refractory period and the relative refractory period?
What is the difference between the absolute refractory period and the relative refractory period?
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Which of the following ions is actively pumped out of the neuron by the sodium-potassium pump?
Which of the following ions is actively pumped out of the neuron by the sodium-potassium pump?
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How does the action potential move down the axon?
How does the action potential move down the axon?
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What is the term for the difference in electrical charge inside and outside of a neuron at rest?
What is the term for the difference in electrical charge inside and outside of a neuron at rest?
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What is the approximate millivolt value of a neuron's resting potential?
What is the approximate millivolt value of a neuron's resting potential?
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Which of the following is essential for maintaining the electrical gradient across the neuron's membrane?
Which of the following is essential for maintaining the electrical gradient across the neuron's membrane?
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What is the primary function of the blood-brain barrier?
What is the primary function of the blood-brain barrier?
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What is the term for the state of a neuron before a nerve impulse is sent?
What is the term for the state of a neuron before a nerve impulse is sent?
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Which of the following is NOT a consequence of the blood-brain barrier's protective function?
Which of the following is NOT a consequence of the blood-brain barrier's protective function?
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What is one of the main ethical considerations in research involving humans?
What is one of the main ethical considerations in research involving humans?
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Which aspect is not one of 'the three Rs' in animal research ethics?
Which aspect is not one of 'the three Rs' in animal research ethics?
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What significant contribution did Santiago Ramón y Cajal make to neuroscience?
What significant contribution did Santiago Ramón y Cajal make to neuroscience?
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Why might studying nonhuman species provide insights into human evolution?
Why might studying nonhuman species provide insights into human evolution?
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Which of the following statements about research findings is most accurate?
Which of the following statements about research findings is most accurate?
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What is the primary focus of biological psychology?
What is the primary focus of biological psychology?
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Which of the following categories does NOT represent a biological explanation of behavior?
Which of the following categories does NOT represent a biological explanation of behavior?
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Which ethical issue is NOT mentioned as a dispute in neuroethics?
Which ethical issue is NOT mentioned as a dispute in neuroethics?
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What is the primary function of a motor neuron?
What is the primary function of a motor neuron?
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Which glial cell type is responsible for forming myelin sheath in the peripheral nervous system?
Which glial cell type is responsible for forming myelin sheath in the peripheral nervous system?
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What is the primary role of the dendrites in a neuron?
What is the primary role of the dendrites in a neuron?
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Which option best describes hyperpolarization?
Which option best describes hyperpolarization?
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What does the blood-brain barrier primarily serve to do?
What does the blood-brain barrier primarily serve to do?
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Which structure of the animal cell is primarily involved in energy production?
Which structure of the animal cell is primarily involved in energy production?
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What is the main function of interneurons?
What is the main function of interneurons?
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What characterizes resting potential in a neuron?
What characterizes resting potential in a neuron?
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Flashcards
Attendance Policy
Attendance Policy
Mandatory attendance with specific absence limits (9 or 11) leading to an 'F'.
Use of Devices
Use of Devices
Laptops are required for classwork, assessments, and exams; cellphones must be silenced.
Plagiarism Rules
Plagiarism Rules
All submissions must be original; plagiarism will be reported.
AI Tools Usage
AI Tools Usage
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Course Materials
Course Materials
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Three Rs in Research
Three Rs in Research
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Neuroethics
Neuroethics
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Santiago Ramón y Cajal
Santiago Ramón y Cajal
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Golgi Stains
Golgi Stains
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Ethical Concerns in Human Research
Ethical Concerns in Human Research
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Threshold
Threshold
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Absolute refractory period
Absolute refractory period
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Relative refractory period
Relative refractory period
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Myelin sheath
Myelin sheath
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Saltatory conduction
Saltatory conduction
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Central nervous system
Central nervous system
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Neuron
Neuron
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Axon
Axon
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Synapse
Synapse
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Depolarization
Depolarization
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Blood–Brain Barrier
Blood–Brain Barrier
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Glial cells
Glial cells
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Cengage Textbook
Cengage Textbook
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MyCourses Platform
MyCourses Platform
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Homework Assignments Weight
Homework Assignments Weight
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Quizzes Structure
Quizzes Structure
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Biological Psychology
Biological Psychology
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Physiological Explanation
Physiological Explanation
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Ethics in Neuropsychology
Ethics in Neuropsychology
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Categories of Biological Explanations
Categories of Biological Explanations
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Blood-Brain Barrier
Blood-Brain Barrier
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Active Transport
Active Transport
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Resting Potential
Resting Potential
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Sodium-Potassium Pump
Sodium-Potassium Pump
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Electrical Gradient
Electrical Gradient
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Neuronal Stimulation
Neuronal Stimulation
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Action Potential
Action Potential
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Nutrient Dependence
Nutrient Dependence
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Study Notes
Course Information
- Course: Biopsychology (PSYC 222)
- Attendance: Mandatory, 9 absences (twice weekly) or 11 (three times weekly) result in an "F"
- Laptops: Mandatory for classwork, assessments, and exams
- Cell phones: Must be on silent and out of sight, except when used for activities
- Drinks: Allowed; food and feet are not
- Artificial Intelligence: Allowed for use as a tool, but plagiarism is strictly prohibited.
Expectations
- Plagiarism will result in disciplinary action, reported to the university.
- All submissions must be original work.
Course Requirements
- Lecture material: Presentations, videos, and activities available on MyCourses
- Resources: Cengage textbook (mandatory), laptop (mandatory)
- Platforms: MyCourses (lecture material, course info, attendance, grades), Cengage (textbook, homework, assignments, activities)
Assessment Details
- Homework Assignments: 5 activities (30 minutes each), worth 10% of the course grade, accessible through Cengage
- In-Class Assignments: 5 pair/group assignments, worth 10% of the course grade, original submissions required
- Quizzes: 5 quizzes (top 4 scores count), worth 20%
- Midterm Exam: 1 exam, worth 30%
- Final Exam: 1 exam, worth 30%
Detail of Assessments
- Homework Assignments: 5, Value 2 points, Weight 10%, Completion grade
- Quizzes: 4, Value 5 points, Weight 20%, Score grade (5 offered; lowest dropped)
- In-Class Assignments: 5, Value 2 points, Weight 10%, Completion grade
- Midterm: 1, Value 30, Weight 30%, Score grade
- Final: 1, Value 30, Weight 30%, Score grade
- Total: 100
Introduction
- All psychology is biological.
- Biological psychology studies the evolutionary and developmental mechanisms of behavior and experience.
- Cultural, social, and cognitive influences, genetics, evolution, hormones, body physiology, and brain mechanisms are involved.
Biological Explanations of Behavior
- Physiological: Explains behavior by relating it to the brain and other organs.
- Ontogenetic: Describes how behavior develops.
- Evolutionary: Reconstructs the evolutionary history of a behavior.
- Functional: Explains why a behavior evolved.
Neuroethics
- Several ethical disputes exist, including abortion and animal use.
- Biological psychologists study nonhumans when behaviour mechanisms are similar across species or when it's easier to study in a nonhuman species, to learn about human evolution (animal studies), and when legal or ethical restrictions prevent certain research on humans
- The legal standard emphasizing the "three Rs": reduction, replacement, refinement.
Neuroscience
- Santiago Ramón y Cajal (1852-1934): Spanish investigator who demonstrated that individual nerve cells in the nervous system are separate. Golgi initially believed the nervous system is one continuous network.
Knowledge Check
- Lists of different nervous system components
Animal Cell Structures
- Membrane, Nucleus, Mitochondria, Ribosomes, Endoplasmic Reticulum
Neuron Structure and Function
- Motor neuron function in spinal cord
- Sensory neuron functions
- Interneurons function in the spinal cord)
- Afferent axon brings information; efferent axon carries away information
Glial Cells
- Astrocytes: Pass chemicals between neurons and blood
- Microglia: Remove waste, viruses, fungi, and dead/damaged neurons
- Oligodendrocytes and Schwann cells: Build myelin sheath that surrounds/insulates certain axons
- Radial glia: Guide neuron migration/growth during embryonic development
Blood-Brain Barrier
- A mechanism that surrounds the brain and blocks most chemicals from entering.
- The immune system doesn't effectively destroy damaged or infected cells in the brain due to the blood-brain barrier.
- Active transport is involved in pumping necessary chemicals (glucose, hormones, amino acids, etc.) into the brain.
Nourishment of Vertebrate Neurons
- Vertebrate neurons depend almost entirely on glucose.
- Glucose is one of the few nutrients that pass through the blood-brain barrier; allows visualization via PET scans
- Neurons need a steady supply of oxygen (20% of all oxygen consumed by the body)
Action Potential
- The resting potential remains stable until the neuron is stimulated.
- Threshold, all-or-none law, depolarization, repolarization, hyperpolarization, absolute/relative refractory periods are key concepts.
Molecular Basis of the Action Potential
- Sodium ions are mostly outside, while potassium ions are inside, due to the sodium–potassium pump.
- Depolarization opens sodium/potassium channels, which draw the positive ions into the cell.
- At the peak of the action potential, sodium channels close.
Propagation of Action Potential
- Action potential starts at axon hillock.
- Action potential transmission occurs along the axon, not by directly traveling down the axon
- Neurons experience absolute and relative refractory periods during this process.
The Myelin Sheath
- Myelin sheaths of axons are interrupted by short unmyelinated sections called nodes of Ranvier.
- Myelin is an insulating material composed of fats and proteins
- Action potentials are regenerated at nodes of Ranvier, resulting in "jumping" of impulses along the axon.
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Description
This quiz covers the essential information and expectations for the Biopsychology course (PSYC 222). Students will be tested on attendance policies, required materials, and assessment details. Understanding these guidelines is vital for success in the course.