QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) ALREADY GRADED A+
neurons Ans✓✓✓receive and transmit information
CAN transport over long distances
glia Ans✓✓✓exchange chemicals with adjacent neurons
CANNOT transport over long distances
membrane Ans✓✓✓two layers of fatty phosolipids
small uncharged molecules that can move freely across the membrane
Ans✓✓✓water (h20), oxygen (02), carbon dioxide (CO2)
charged ions need protein channels to pass through the membrane
Ans✓✓✓sodium (Na), potassium (K), calcium (Ca), chloride (Cl)
4 major structures that compose a neuron Ans✓✓✓dendrites: branching
fibers, information receiver
axon: information sender
soma: cell body; contains nucleus, ribosomes, mitochondria
presynaptic terminals: axon releases chemicals here that cross from one
neuron to another through the synaptic gap
, afferent axons Ans✓✓✓bring information INTO the structure; sensory
neurons
efferent axons Ans✓✓✓send information AWAY from the structure;
motor neurons
sensory neurons Ans✓✓✓send messages from the skin and senses TO
the brain
motor neurons Ans✓✓✓sends messages from the brain OUT to the
muscles
interneurons Ans✓✓✓work in the spinal cord and brain to help
process/transmit information
nucleus Ans✓✓✓structure that contains chromosomes
mitochrondria Ans✓✓✓powerhouse of the cell
ribosomes Ans✓✓✓site of protein synthesis in the cell
endoplasmic reticulum Ans✓✓✓network of thin tubes that transport
newly synthesized proteins to other locations