An organ is made up of only one tissue type; for example, the heart is made of cardiac muscle.
Answer the following statement true (T) or false (F)
False
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The placenta releases:
a. chorionic gonadotropins b. progesterone c. estrogen d. all of the above
Myasthenia gravis
a. is an autoimmune disease b. occurs when axons are unable to release adequate amounts of acetylcholine c. can be treated with a drug that temporarily inhibits acetylcholinesterase d. has characteristics a and c e. has none of the above characteristics
Summation of all incoming signals occurs at the axon terminus of a neuron.
Indicate whether the statement is true or false.
Within a chemical synapse, the receptors _____.
A. bind to a variety of different ligands B. are always degraded by enzymes in order disable them C. are only responsive to changes in voltage D. bind to very specific ligands