Question 1
Small extensions of the muscle cell's plasma membrane that connect with myofibrils are called
◦ T tubules.
◦ cross-bridges.
◦ sarcoplasmic reticulum.
◦ neuromuscular junctions.
◦ neurotransmitters.
Question 2
Tetanus is caused by a toxin produced by
◦
Clostridium botulinum.
◦
Clostridium tetani.
◦
Clostridium perfringens.
◦
Clostridium welchii.
◦
Clostridium dificile.