Voltage-gated sodium channels are sensitive to changes in the extracellular concentration of
A. potassium ions.
B. proteins.
C. sodium ions.
D. chloride ions.
E. calcium ions.
E
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Acetylcholine
a. is released from an axon. b. destroys acetylcholinesterase. c. is blocked by sodium. d. both (a) and (b) above. e. all of these answers.
Endocrine glands differ from exocrine glands in
release thier products into intersticial fluid or blood body or epithelial surfaces via ducts extracellular fluid None of the choices are correct
Transverse tubules contain voltage-gated calcium channels that respond to membrane depolarization, and are directly coupled to the calcium release channels in the sarcoplasmic reticulum.
Answer the following statement true (T) or false (F)
Identify the bone containing the cribriform plate. What is significant about this structure?
A) sphenoid; it forms the floor of the cranium and the roof of the nasal cavity and olfactory foramina run through it B) sphenoid; it forms the posterior part of the hard palate C) ethmoid; it forms the floor of the cranium and the roof of the nasal cavity and olfactory foramina run through it D) ethmoid; it forms the posterior part of the hard palate E) palatine; it forms the posterior part of the hard palate