PLEASE HELP Fill in the both blanks: In skeletal muscle, DHP receptors are found in the membrane, while ryanodine receptors are found in the membrane. top(1) row: sarcoplasmic reticulum, T-tubule, Mitochondrial, Nerve cell bottom

(2) row:Axon terminal, Sarcolemma, T-tubule, Terminal Cistern ​

What is thought to have caused the mass extinction at the end of the cretaceous period?

Which statement best describes how the loudness of the sound affects the high-pressure region created by the sound wave? a. a louder sound has no effect on the pressure created. b. a louder sound means a high-pressure region that is higher. c. a louder sound means a high-pressure region that is not as high.

Which feature of a human community is similar to a niche in a biological community