Which of the following statements best describes RNA?
A. RNA is a single-stranded molecule.
B. RNA is a double helix.
C. RNA molecules are antiparallel.
D. RNA is found outside a cell.
E. RNA contains the base thymine.
Answer: A
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Synaptic delay is caused by
A) neurotransmitter diffusion. B) binding of acetylcholine to post-synaptic receptors. C) calcium influx and neurotransmitter release. D) production and transport of neurotransmitter within the neuron. E) the lack of permeability of the post-synaptic membrane.
Timmy is a cantankerous toddler who has just threatened that he will hold his breath until Mom gives him some chocolate. His mother refuses to be manipulated and watches in amusement as Timmy stubbornly refuses to breathe. To her horror, Timmy loses consciousness and collapses onto the floor. Her cousin, who is enrolled in a course for emergency medical technical (EMT) training, is visiting, and
tells her there is no need to call for an ambulance. Why did Timmy lose consciousness? Should his mother trust her instincts and call for help and begin CPR, or should she listen to her well-meaning but young and inexperienced cousin? Explain. What will be an ideal response?
Using the figure below, identify the labeled part.
1) Label A: ______________________________
2) Label B: ______________________________
3) Label C: ______________________________
4) Label D: ______________________________
5) Label E: ______________________________
6) Label F: ______________________________
7) Label G: ______________________________
8) Label H: ______________________________
9) Label I: ______________________________
10) Label J: ______________________________
11) Label K: ______________________________
12) Label L: ______________________________
13) Label M: ______________________________
14) Label N: ______________________________
15) Label O: ______________________________
16) Label P: ______________________________
17) Label Q: ______________________________
Of the following arteries, which one is more distal to the heart?
A) Superficial palmar arch B) Subclavian artery C) Brachial artery D) Ulnar artery