Unit 2 - Exam Flashcards
Cell division in body cells, causing growth, development, and replacement of dead cells.
MITOSIS
Your genotype is your genetic make-up, and your actual physical traits are your ___.
PHENOTYPE
This refers to whether a gene is transcribed to a protein, or turned βonβ
GENE EXPRESSION
Proteins are made of ____ linked together
AMINO ACIDS
Most chromosomes are ___, and they do not determine sex.
AUTOSOMES
A trait that is determined by multiple genes.
POLYGENIC
The smallest unit of life
CELL
The matching of bases when building a new DNA molecule follows which rule?
COMPLEMENTARY BASE PAIRING
___ is the process by which a stem cell because a specific cell, like a liver cell or a muscle cell (two words, no spaces).
CELLULAR DIFFERENTIATION
The electrical impulse that travels down the axon is called an?
Action Potential
What drugs cross the blood-brain barrier and affect the nervous system.
PSYCHOACTIVE
The ___ of the neuron receive signals from other neurons.
DENDRITES
The portion of the nervous system that consists of nerves running throughout your body
PNS
The portion of the nervous system that includes the brain and spinal cord
CNS
Portion of the brainstem that (among other things) controls respiration and heart rate (two words)
MEDULLA OBLONGATA
An action potential travels along the ___ of a neuron.
AXON
This lobe of the cerebrum processes visual information
OCCIPITAL
The ____ is a wall between the bloodstream and the nervous system, and only some substances can cross it
BLOOD BRAIN BARRIER
A neurotransmitter that can produce feelings of wellbeing, pleasure, and euphoria
DOPAMINE
The lowest part of the brain
BRAINSTEM
The chemical signal that travels between neurons is the
NEURO TRANSMITTER
The top portion of the brain that is responsible for higher cognitive function, and includes several lobes with specific functions
CEREBRUM
The ___ is the communication cell of the nervous cell.
NEURON
This lobe of the cerebrum processes tactile sensory information (touch).
PARIETAL
The ___ lobe of the cerebrum is responsible for decision-making, voluntary motor, and personality.
FRONTAL
The link between the right and left hemispheres of the brain
CORPUS CALLOSUM
The structure of the brain that smooths and coordinates motor activity (does not function well if large amounts of alcohol are consumed).
CEREBELLUM
The ___ sheath insulates the axon.
MYELIN
This lobe of the cerebrum processes auditory and olfactory (smell) information
TEMPORAL
The top portion of the brain that is responsible for higher cognitive function, and includes several lobes with specific functions
CEREBRUM
A gap between two neurons
SYNAPSE
Opioids bind to this structure on a neuron
OPIOID RECEPTOR
This neuron releases neurotransmitter to signal another neuron (or muscle)
PRESYNAPTIC NEURON
An ___ neurotransmitter will stimulate/activate the postsynaptic neuron.
EXCITATORY
An ___ neurotransmitter will βput the brakesβ or stop activity in the postsynaptic neuron.
INHIBITORY
A portion of the brainstem that includes the ventral tegmental area (VTA)
MIDBRAIN