BIO 30 UPDATED ACTUAL QUESTIONS
AND CORRECT ANSWERS COMPLETE
STUDY GUIDE RESOURCE
●● glial cells
Answer: the cells that support and nourish the neurons (also known as
schwaan cells)
●● Sensory neurons
Answer: relay information about the environment to the CNS (five
senses)
●● Interneurons
Answer: link sensory neurons and motor neurons in the body
●● Motor neurons
Answer: carry nerve impulses from CNS to the effectors (muscles and
glands)(movement)
●● cell body
Answer: contains the nucleus and where all the metabolic reactions
occur within the cell
,●● Dendrites
Answer: branching terminals that carry information to the cell body
(both sensory and motor)
●● Axon
Answer: extension of the cytoplasm that carries nerve impulses from the
dendrites to the effectors
●● Myelin sheath
Answer: A layer of fatty tissue that covers the axon and protects it from
losing charged ions formed by schwonn cells
●● Nodes of Ranvier
Answer: the gaps in between the myelin sheath
●● true or false: unmyelinated nerve fibres transmit nerve fibres faster
because of salitory conduction
Answer: false
●● white matter
Answer: myelinated neurons
, ●● grey matter
Answer: unmyelinated neuron cell bodies and short, unmyelinated axons
●● How is a electrochemical signal formed?
Answer: unequal concentration of positive ions across a membrane
●● electrical current
Answer: a faster current that diminishes near the end and uses external
source to generate energy
●● Nerve impulse
Answer: a slower process that remains strong at the end and uses cellular
energy(ATP) to move ions across a cell membrane
●● membrane potential
Answer: when one is more positive than the other
●● resting membrane potential
Answer: -70mV
●● Polarization
AND CORRECT ANSWERS COMPLETE
STUDY GUIDE RESOURCE
●● glial cells
Answer: the cells that support and nourish the neurons (also known as
schwaan cells)
●● Sensory neurons
Answer: relay information about the environment to the CNS (five
senses)
●● Interneurons
Answer: link sensory neurons and motor neurons in the body
●● Motor neurons
Answer: carry nerve impulses from CNS to the effectors (muscles and
glands)(movement)
●● cell body
Answer: contains the nucleus and where all the metabolic reactions
occur within the cell
,●● Dendrites
Answer: branching terminals that carry information to the cell body
(both sensory and motor)
●● Axon
Answer: extension of the cytoplasm that carries nerve impulses from the
dendrites to the effectors
●● Myelin sheath
Answer: A layer of fatty tissue that covers the axon and protects it from
losing charged ions formed by schwonn cells
●● Nodes of Ranvier
Answer: the gaps in between the myelin sheath
●● true or false: unmyelinated nerve fibres transmit nerve fibres faster
because of salitory conduction
Answer: false
●● white matter
Answer: myelinated neurons
, ●● grey matter
Answer: unmyelinated neuron cell bodies and short, unmyelinated axons
●● How is a electrochemical signal formed?
Answer: unequal concentration of positive ions across a membrane
●● electrical current
Answer: a faster current that diminishes near the end and uses external
source to generate energy
●● Nerve impulse
Answer: a slower process that remains strong at the end and uses cellular
energy(ATP) to move ions across a cell membrane
●● membrane potential
Answer: when one is more positive than the other
●● resting membrane potential
Answer: -70mV
●● Polarization
