A nerve fiber contracts on receiving the nerve impulse which is carried from the sarcolemma to every myofibril by the
A Sarcomere
B Sarcoplasmic reticulum
C Calcium ions
D T-tubules​

What advantages does a pedigree have over a written passage?

1. you serve a volleyball with a mass of 2.1 kg. the ball leaves your hand with a speed of 30 m/s. the ball has energy. calculate it. 2. a baby carriage is sitting at the top of a hill that is 21 m high. the carriage with the baby weighs 12 n. the carriage has energy. calculate it. 3. a car is traveling with a velocity of 40 m/s and has a mass of 1120 kg. the car has . calculate it.

40. invasive species -. (2 points) olive in the area the species have always lived o naturally moved into a new area are brought to a new area by human activities do not affect the ecosystem of an area