The tubercle found on the neck of a rib articulates with a facet found on the
a) spinous process of a thoracic vertebra.
b) spinous process of a lumbar vertebra.
c) transverse process of a thoracic vertebra.
d) xiphoid process of the sternum.
e) manubrium of the sternum.
c
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The sympathetic preganglionic neuron cell bodies are housed in the ________ horn of the appropriate thoracolumbar regions of the spinal cord.
Fill in the blank(s) with the appropriate word(s).
Chemical synapses are more common than electrical synapses
Indicate whether this statement is true or false.
Which of the following is correct?
a. norepinephrine and acetylcholine have opposite effects on the activity of ion channels in pacemaker cells b. norepinephrine increases the slope of pacemaker potentials leading to increased heart rate c. acetylcholine increases the duration of diastole d. all of the above
Pancreatic amylase catalyzes the breakdown of oligosaccharides to disaccharides with the addition of water. What classification of enzymes would amylase be in?
A. Dehydrogenase B. Hydrolase C. Isomerase D. Synthase