In single unit smooth muscle, the cells have abundant ____, which allow them to

Question

In single unit smooth muscle, the cells have abundant ____, which allow them to function as a single unit, called a _____. a. Gap junctions, sarcomere b. Gap junctions, functional syncytium c. Desmosomes, function syncytium d. Desmosomes, sarcomere Sympathetic nerve fibers originate from: a. Thoracic region of spinal cord b. Lumbar region of spinal cord c. Sacral region of spinal cord d. A and B All of the following organs have dual innervation by the sympathetic and parasympathetic branches of the autonomic nervous system, except: a. Blood vessels b. Kidney c. Heart d. Small intestine ______ synapses dominant in the autonomic nervous system, while _____ synapses dominant in the heart. a. Electrical, Chemical b. Chemical, Excitatory c. Excitatory, Inhibitory d. Chemical, Electrical The involuntary branch of the peripheral nervous system is: a. The somatic nervous system b. The central nervous system c. The autonomic nervous system d. The efferent branch The two main neurotransmitters utilized by the peripheral nervous system are: a. Norepinephrine and acetylcholine b. Acetylcholine and dopamine c. Norepinephrine and dopamine d. Norepinephrine and vitorin

Explanation / Answer

32- b as Smooth muscles have 2 functional category single unit multi-unit. single unit smooth muscle has gap junction( electrical synapses).

33. d As they originate from first thoracic and third lumbar segments.

34. a It won't be blood vessels as they are innervated by only sympathetic nervous system.

35.d

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