Muscles move body parts by contracting and then relaxing. Muscles can pull bones, but they can't push them back to the original position. So they work in pairs of flexors and extensors. The flexor contracts to bend a limb at a joint.
Being ill-prepared. (I am not sure what the options were)
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Symptoms of acute HIV infection can include:
rash
,fever
,chills
,headache
,fatigue
,sore throat
,night sweats
,loss of appetite
ulcers that appear in the mouth, esophagus, or genitals
,swollen lymph nodes
muscle aches
,diarrhea
Also common: opportunistic infection, headache, oral thrush, pneumonia, red blotches, severe unintentional weight loss, skin rash, or swollen lymph nodes