Question

2. Curare blocks acetylcholine receptors at the motor end plate. This would result in: (1) Inability of the muscle fiber to respond to nervous stimulation (2) Increased muscle stimulation (3) Increased actylcholinesterase production (4) Lack of calcium uptake by the muscle fiber 3. The structure that is analogous to the Zline of skeletal muscle is the __ of smooth muscle. The structure that is analogous to troponin of skeletal muscle is _ muscle is ___ of smooth muscle. 4. Draw a synapse between 2 neurons. Label the following: Presynaptic neuron, Postsynaptic neuron, Synaptic vesicles, Voltage-regulated calcium channel, Chemical-regulated sodium channel. 5. Draw a diagram of the preganglionic neuron, postganglionic neuron, and effector for both Sympathetic Nervous System and Parasympathetic Nervous System. indicate which neurotransmitter is released by each neuron and label the receptors at all locations for the neurotransmitter. 6. Which cells have a resting membrane potential? Which cells can have an action potential? 7. Circle which of the following choices pertain to a Graded Potential. (1) Localized or Widespread (2) Gradations or All-or-None (3) Threshold or Not (4) Short distance or Long distance

Answer 1

Chegg's guidance allow us to answer one question at a time. Kindly repost the other questions.

Answer 2 – (a) Curare blocks acetlycholine receptors at the motor end plate. This would result in the inability of the muscle fibre to repond to nervous stimulation.

Explanation- It is because the acetylcholine receptors are the neurotransmitters through which the information flow or nerve impulse get transfer, if it get blocked by curare then definitely it will not respond to the nervous stimulation.

Answer 3 – The structure that is analogous to the z line of skeletal muscle is the dense body of smooth muscle.The structure that analogous to troponnin of skeletal muscle is contractile element of smooth muscle.

Explanation- As there is no z line or troponnin element present in the smooth muscle. These dense bodies analogous to z line work accordingly. Same for troponnin element of skeletal or cardiac which is absent in the smooth muscle cell which can be compensate with the presence of contractile element which work similar.

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