Module 2 exam study guide - Psych 101 portage learning 2025-2026 most recent version Comprehensive 70 questions and verified answers accurate solutions Already graded A+ Get it 100% correct
action potential - CORRECT ANSWER: began with a stimulus, changes how permeable
the cell wall is. sodium channels then open and the sodium ions come rushing into the cell called depolarization.
action potential - CORRECT ANSWER: when a bioelectrical nerve impulse runs down a neurons axon, causing a neurotransmitter to be released at the terminal button
adrenals - CORRECT ANSWER: regulate fight or flight response, metabolism and
sexual desire
all-or-none principle - CORRECT ANSWER: the law that the neuron either fires at 100% or not at all
allele - CORRECT ANSWER: Different forms of a gene
autonomic nervous system - CORRECT ANSWER: A subdivision of the peripheral
nervous system. Controls involuntary activity of visceral muscles and internal organs and glands.
axon - CORRECT ANSWER: A threadlike extension of a neuron that carries nerve
impulses away from the cell body.
- / 2
bottom layer of brain - CORRECT ANSWER: base of brain, brain stem, and cerebellum
- medulla and cerebellum
Brain Plasticity - CORRECT ANSWER: brains ability to rewire itself
central nervous system - CORRECT ANSWER: brain and spinal cord
cerebellum - CORRECT ANSWER: muscle movement and posture
CT scan (computed tomography) - CORRECT ANSWER: involves passing a special x-
ray through the brain so a picture can be produced
Dendrites - CORRECT ANSWER: The branching fibers of neurons that receive neural
impulses from other neurons and convey impulses toward the cell body.
depolarization and repolarization happens - CORRECT ANSWER: all the way down the axon as the action potential rushes down the length of the axon
Describe what we know about each of the four children's genotype and phenotype, at least as they pertain to hair color, from the Punnett square example in the module. - CORRECT ANSWER: Child aa is light-haired and, therefore, definitely has two light- haired recessive alleles. But, without genetic testing, you can't just look at the other children to know whether they are heterozygous or homozygous for hair color. The phenotype is dark hair, but no one can tell just by looking whether a recessive allele for light hair is also present, since the recessive allele is not observable.
Dominant - CORRECT ANSWER: dominant alleles are observable and tend to be
exposed over recessive alleles
- / 2