BIO 30 UPDATED ACTUAL QUESTIONS AND CORRECT ANSWERS COMPLETE STUDY GUIDE RESOURCE

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