In detail, provide below a summary of the contraction and relaxation of the skeletal muscle cell. In your summary, you must use all of the following terms, structures, or molecules (some may
be used more than once): calcium, sodium, potassium, axon, axon terminal, synaptic cleft,
troponin, actin, acetylcholine, sarcolemma, T-tubule, myosin, synaptic vesicle, terminal cisterns
of SR, action potential, Na+/K+ pump, ACh receptor, tropomyosin, sarcomere, cross-bridge
formation, ATP, and active sites on actin. **This should be in your own words and not copied
from the book or other resource.**

Which example is a indication of stress a. becoming more alert b. narrowing air passages c. slowing down if the heartbeat d. decreasing blood sugar with adrenaline

The herpes viruses are important enveloped dna viruses that cause disease in vertebrates and in some invertebrates such as oysters. some of the human forms are herpes simplex virus (hsv) types i and ii, causing facial and genital lesions, and the varicella zoster virus (vsv), causing chicken pox and shingles. each of these three actively infects nervous tissue. primary infections are fairly mild, but the virus is not then cleared from the host; rather, viral genomes are maintained in cells in a latent phase. the virus can later reactivate, replicate again, and infect others. in electron micrographs of hsv infection, it can be seen that the intact virus initially reacts with cell surface proteoglycans, then with specific receptors. this is later followed by viral capsids docking with nuclear pores. afterward, the capsids go from being full to being "empty." which of the following best fits these observations? a) viral capsids are needed for the cell to become infected; only the capsids enter the nucleus. b) the viral envelope is not required for infectivity, since the envelope does not enter the nucleus. c) only the genetic material of the virus is involved in the cell's infectivity, and is injected like the genome of a phage. d) the viral envelope mediates entry into the cell, the capsid mediates entry into the nuclear membrane, and the genome is all that enters the nucleus.

What typically happens when a family member has a problem with alcohol or drugs? adults in the family are affected more than children children in the family are affected more than adults. the entire family is affected. no one in the family is affected.