Question

Question 15 (2 points) Which of the following matches the effects of the autonomic nervous system subdivisions on ion channels in effector cells when controlling heart rate? C 1) parasympathetic nervous system opens calcium channels 2) parasympathetic nervous system opens potassium channels 3) sympathetic nervous system opens chloride channels Save Question 16 (2 points) Acetylcholine binds to nicotinic receptors which causes this ion channel to open. How is this channel gated? 1) voltage 2) antagonistically 3) mechanically tarted 4) 名 F 4 0

Answer 1

Ans 15) The heart rate is controlled majorly by the autonomic nervous system where the parasympathetic nervous systems helps in controlling the heart rate whereas the sympathetic helps in increasing the heart rate. The parasympathetic nervous system opens the calcium chloride channels for the regulation. Hence the right answer is parasympathetic nervous system opens calcium channels.

Ans 16) The acetylcholine binds to nicotine receptors causing opening of ion channels is a type of mechanically gated channel. This adds complexity to the channels and hence provides on additional layer of safety and security. They are highly selective and hence is the right choice for the neurotransmitters like acetylcholine.