The head of the humerus articulates with the
A. greater trochanter.
B. trochlear notch.
C. glenoid cavity.
D. greater tubercle.
E. intertubercular sulcus.
C
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Myasthenia gravis is a collection of muscle disorders that cause muscle fatigue and weakness. What is the major mechanism?
A. Autoimmune destruction of L-type Ca2+ channels. B. Overproduction of acetylcholinesterase C. Autoimmune destruction of nicotinic acetylcholine receptors D. Demyelination of axons in motor pathways E. A tumor that overproduces acetylcholine
When an antigen is bound to a Class II MHC protein, it can activate a ________ cell
A) plasma B) helper T C) NK D) suppressor T E) cytotoxic T
Forensic DNA evidence can be taken from hair or bone but not blood or semen.
Answer the following statement true (T) or false (F)
Anterior pituitary hormones
A. bind to intracellular receptor molecules. B. are transported in the hypothalamohypophysial portal system. C. are all proteins or glycoproteins. D. are released as a direct result of action potentials. E. have a half-life of hours.