A 36-year-old man enters the hospital in an extremely debilitated condition. He has purple-brown skin lesions (a symptom of Kaposi's sarcoma) and a persistent cough. A physical examination reveals swollen lymph nodes, and laboratory tests find a very low lymphocyte count. Information taken during the personal history reveals that he has multiple sex partners with whom he frequently engages in
unprotected sex. What is likely to be the man's problem and what is his outlook?
What will be an ideal response?
He is probably suffering from AIDS. His outlook is poor once the disease has progressed to this advanced stage. There is no cure and drug therapy has had limited short-term success.
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The terminal cisternae are structural features of the
A) myofilaments. B) sarcoplasmic reticula. C) myofibrils. D) I bands. E) sarcolemma.
While sitting at your desk, you drop your pencil onto the floor. You bend over to pick up the pencil. In order to straighten up and continue your exam, you must use which of the following muscles?
A. Erector spinae B. Tibialis anterior C. Tibialis anterior and semimembranosus D. Semimembranosus E. Extensor hallucis longus
Answer the following questions true (T) or false (F)
1. The posterior (dorsal) root of a spinal nerve and the posterior ramus are considered mixed nerves since they both carry sensory and motor information. 2. The lumbar nerve plexuses arise from the anterior rami of L1 - L4 and innervate structures of the pelvis and lower limb. 3. Proprioceptors are located in the musculoskeletal system where they detect the movement and position of a joint or body part.
In the absence of a signal sequence, a newly synthesized protein localizes to the
A) plasma membrane. B) nucleus. C) mitochondria. D) peroxisome. E) cytoplasm.