Autonomic ________ are collections of sympathetic postganglionic axons and parasympathetic preganglionic axons, as well as some visceral sensory axons.
Fill in the blank(s) with the appropriate word(s).
plexuses
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Asthma is a respiratory disorder characterized by construction of airways and mucus production which makes it very difficult to breathe. The constriction of airways, mucus production and altered gene expression in the cells lining the airways of asthmatics is due to increased release of neurotransmitter acetylcholine. Explain how a single molecule can have such a large and diverse effect in a
single cell. What will be an ideal response?
When an action potential reaches the presynaptic terminal of a neuron, the NEXT event is
A) uptake of neurotransmitter from the synaptic cleft. B) active transport of calcium ions out of the cell. C) diffusion of calcium ions into the cell. D) immediate release of neurotransmitter.
Which of the following is sometimes visible under the skin of the temporal region?
A. Maxillary artery B. Transverse facial artery C. Deep temporal artery D. Superficial temporal artery E. External jugular vein
Intrinsic heart rate may be influenced or modified by ________.
A) either the SA node or the AV node only, but no other factors B) the autonomic nervous system C) the somatomotor cortex D) hormones secreted by the lungs E) enzymes released from the kidney