Question 1
Botulism toxin disrupts motor control by
◦ blocking the release of acetylcholine by motor neurons.
◦ blocking inhibitory signals to motor neurons.
◦ killing motor neurons.
◦ causing demyelination of motor neurons.
◦ blocking acetylcholine receptors on muscle cells.
Question 2
How does tetanospasmin affect motor control?
◦ It induces nervous system proteins to fold into abnormal shapes.
◦ It triggers the endocytosis of skeletal muscle cells.
◦ It is a pyrogenic toxin.
◦ It blocks the release of inhibitory neurotransmitters in the CNS.
◦ It blocks the secretion of acetylcholine into the synaptic cleft.