You are hiking through the jungles of Central America and are hit in the thigh by a curare-poisoned dart arrow! Consider the neuromuscular junction of a pre-synaptic neuron and the quadriceps muscle of the thigh. Which of the following would be an effect of the curare?
A. Muscle contraction of the quadriceps, leading to muscle cramping and inability to move
B. Muscle paralysis of the quadriceps, leading to the inability to move
B. Muscle paralysis of the quadriceps , leading to the inability to move.
Curare poisoned dart arrow were used by the South American Indians and which mainly effects nueromuscular junction .It paralyses the effected person but not kills.
You are hiking through the jungles of Central America and are hit in the thigh by...
Consider the neuromuscular junction between a pre-synaptic neuron and the diaphragm muscle. Acetylcholine is a neurotransmitter that is released from the presynaptic neuron to induce muscle contraction in the post-synaptic muscle cell. Which of the following would be an effect of tetrodotoxin? A. More acetylcholine in the synapse of the neuromuscular junction with the diaphragm B. Less acetylcholine in the synapse of the neuromuscular junction with the diaphragm
Please help me with several of these questions, thank you very much. 1. During the propagation of an action potential along the axon of a neuron, what is happening at the leading edge (the front) of the region of depolarization as it moves down the axon? a. Ligand-gated Na+channels are opening. b. Voltage-gated Na+channels are opening. c. Ligand-gated K+channels are opening. d. Voltage-gated Na+channels have become inactive and refractory. e. Voltage-gated Na+channels are closing. 2. During transcellular transport of glucose...