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    Antigen presentation and cytotoxic T lymphocytes (CTLs): elucidating a common roadblock for students
    Active learning resource for pre-Nursing anatomy and physiology lecture explaining antigen presentation to CTLs and how the CTLs recognize and destroy the pathogen using Biointeractive animations...
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    Electrical Activity of Neurons
    This tutorial describes how neurons generate action potentials, and how scientists measure neuronal activity and record the firing of individual neurons.
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    Sex Verification Testing of Athletes
    This interactive module explores the biology of sex determination and development in humans, set against the backdrop of the different sex testing policies implemented throughout sports history.
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    Electrical and chemical communication in the nervous system
    This activity guides students through an online tutorial to examine the electrical and chemical communication of neurons.
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    Targeting Infected Cells for Immune Defense
    This animation shows how a cell infected by a virus signals cytotoxic T cells to destroy itself.
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    The Biology of Skin Color
    This film explores the hypothesis that different tones of skin color in humans arose as adaptations to the intensity of ultraviolet radiation in different parts of the world.
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    When tests disagree, how do I know if I have COVID-19?
    Students will learn about infectious disease and the immune response to infection by investigating different types of tests (PCR, antigen, and antibody tests) to detect the SARS-CoV-2 viral genetic...
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    Teaching Thermal Physiology of Reptiles and Amphibians to Undergraduate Students
    This module contains materials and activities for teaching undergraduate students about the thermal physiology of reptiles and amphibians. The module begins with an interactive lecture introducing...
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    Two-Species Model
    These two Excel worksheets simulate the population growth of two interacting species. In isolation, each species grows logistically, but interaction effects between species may limit or enhance...
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    Serial Dilutions
    In this Excel workbook, users will enter the original cell concentration and the desired dilution factor (10, 100, and 1000). The program will then calculate the new cell concentration.
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    Phylogeography Simulator
    This Excel workbook simulates the phylogeography of an asexually reproducing species.
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    Transpiration
    In this lab, students will examine differences between C3 and C4 plants in their transpiration rates.
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    Split Decomp
    This Excel worksheet performs split decomposition on a set of four DNA sequences and their associated amino acid sequences. The user can type in the sequences or paste them in from a text file.
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    Protein Analysis
    This Excel workbook allows the analysis of sample or imported protein sequences. The model can analyze protein sequences up to 500 amino acids long.
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    DeFinetti 1.0
    This Excel workbook simulates evolution of a single gene with three alleles. The user assigns fitness values to each of the six possible genotypes, then enters starting allele frequencies for each...
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    Database Construction and Sampling
    Creating your own database is an excellent way for students to learn the trials and tribulations of data collection and management. Construction of three simple databases using a spreadsheet is...
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    Introduction to Mathematical Modeling in Biotechnology, Cell Biology, and Physiology
    The course is a mathematical and computational exploration of five diverse areas of biology: human locomotion, gene sequence analysis, signal transduction pathways involved in cancer,...
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    Pharmacokinetics
    This Excel module explores how drugs are processed and absorbed in the human body.
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    COVID-19 Model
    This Excel worksheet implements an SEAIHRD model for Covid-19 (Susceptible, Exposed, Asymptomatic infective, symptomatic Infective, Hospitalized infective, Recovered, Deceased).
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    SIR BuildIt
    An introduction to epidemiological models using interactive Excel worksheets
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