The T tubule ranges transversely to the surface of the muscle cell membrane
Indicate whether the statement is true or false
T
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All cells (not just animal cells) have
a. mitochondria. b. a cell membrane. c. a cell wall. d. a nucleus. e. microtubules.
Explain the functional significance of the T-tubules of the sarcolemma and the terminal cisternae of the sarcoplasmic reticulum
A) The increased surface of both structures increases the speed and efficiency with which the end-plate potential leads to sarcomere contraction. B) The abundance of each structure increases the rate of ATP production. C) The T-tubules and terminal cisternae enhance the chemical attraction between myosin and actin. D) The increased surface area provides space for more ligand gated ion channels, thus increasing the effectiveness of acetylcholine binding.
What cell produces bile?
A) Hepatocyte B) Acinar cell C) Chief cell D) Canaliculi
The substantia nigra interconnects with the
A. basal nuclei. B. tegmentum. C. red nuclei. D. reticular nuclei. E. tectum.