BMSC 207 – Module 3 Unlocked: High-Yield Questions & Clear Answers | 2025 Exam
UPDATES.
About This Guide:
This resource focuses on Module 3 of BMSC 207, providing verified questions and expert-reviewed
answers to help you master the most important concepts. Whether you're prepping for a quiz, midterm,
or just trying to stay ahead, this guide will boost your understanding and confidence in anatomy &
physiology topics covered in this module.
Functions of astrocytes? - ✔✔-- take up and release chemicals at synapses
- proved neurons with substrates for ATP
- help maintain homeostasis in the extracellualr fluid (take up K+ and H2O)
- surround vessels
- part of the blood brain barrier
- influence vascular dynamics
how is ion permeability altered? - ✔✔-by opening or closing ion channels in the membrane
what are 5 major types of ion channels? - ✔✔-- Na+ channels
- K+ channel
- Ca2+ channel
- Cl- channel
- monovalent cation channels (allow Na+ and K+ to pass)
what are astrocytes? - ✔✔-- highly branched glial cells in CNS believes to make up half of all cells in the
brain
- several subtypes, form a functional network
what are axons? - ✔✔-carry outgoing signals from the integrating center to target cells
what are dendrites? - ✔✔-receive incoming signals from neighboring cells
, What are different variations in gated channels? - ✔✔-- voltage for channel opening can vary from
channel to channel
- the speed at which channels open or close varies
- many channels that open to depolarizations will close during repolarization
- some channels spontaneously inactivate
- Each major channel type has subtypes, some have many
what are ependymal cells? - ✔✔-line fluid filled cavities in the brain and spinal cord
what are MS symptoms? - ✔✔-sensory, motor and cognitive issues
what are nerves? - ✔✔-bundles of peripheral neurons
what are the two sources of resistance in a cell? - ✔✔-- membrane resistance (Rm) (the resistance of
phospholipid bilayer)
- internal resistance of cytoplasm (Ri) (cytoplasmic composition and size of the cell)
what are the underlying mechanisms for MS? - ✔✔-- autoimmune (immune cells attach myelin)
- reduced ability of myelin producing cells
- genetic and environmental factors
what are two factors that influence the membrane potential? - ✔✔-- the uneven distribution of ions across
the cell membrane
- membrane permeability to those ions
what are voltage-gated channels? - ✔✔-respond to changes in cells membrane potential
what do axons of embryonic neurons contain? - ✔✔-growth cones that sense and move towards particular
chemical signals
UPDATES.
About This Guide:
This resource focuses on Module 3 of BMSC 207, providing verified questions and expert-reviewed
answers to help you master the most important concepts. Whether you're prepping for a quiz, midterm,
or just trying to stay ahead, this guide will boost your understanding and confidence in anatomy &
physiology topics covered in this module.
Functions of astrocytes? - ✔✔-- take up and release chemicals at synapses
- proved neurons with substrates for ATP
- help maintain homeostasis in the extracellualr fluid (take up K+ and H2O)
- surround vessels
- part of the blood brain barrier
- influence vascular dynamics
how is ion permeability altered? - ✔✔-by opening or closing ion channels in the membrane
what are 5 major types of ion channels? - ✔✔-- Na+ channels
- K+ channel
- Ca2+ channel
- Cl- channel
- monovalent cation channels (allow Na+ and K+ to pass)
what are astrocytes? - ✔✔-- highly branched glial cells in CNS believes to make up half of all cells in the
brain
- several subtypes, form a functional network
what are axons? - ✔✔-carry outgoing signals from the integrating center to target cells
what are dendrites? - ✔✔-receive incoming signals from neighboring cells
, What are different variations in gated channels? - ✔✔-- voltage for channel opening can vary from
channel to channel
- the speed at which channels open or close varies
- many channels that open to depolarizations will close during repolarization
- some channels spontaneously inactivate
- Each major channel type has subtypes, some have many
what are ependymal cells? - ✔✔-line fluid filled cavities in the brain and spinal cord
what are MS symptoms? - ✔✔-sensory, motor and cognitive issues
what are nerves? - ✔✔-bundles of peripheral neurons
what are the two sources of resistance in a cell? - ✔✔-- membrane resistance (Rm) (the resistance of
phospholipid bilayer)
- internal resistance of cytoplasm (Ri) (cytoplasmic composition and size of the cell)
what are the underlying mechanisms for MS? - ✔✔-- autoimmune (immune cells attach myelin)
- reduced ability of myelin producing cells
- genetic and environmental factors
what are two factors that influence the membrane potential? - ✔✔-- the uneven distribution of ions across
the cell membrane
- membrane permeability to those ions
what are voltage-gated channels? - ✔✔-respond to changes in cells membrane potential
what do axons of embryonic neurons contain? - ✔✔-growth cones that sense and move towards particular
chemical signals
