The answer is transverse or t tubules. These invaginations into the skeletal muscles cells play a significant role in electrical conductivity of impulse across muscle or cardiac fibres. They regulate calcium concentration and it's release in ion channels hence enabling a forceful contraction of cardiac and muscle cells.
Answer:Tell the teacher then follow classroom procedures for dealing with hazardous waste
Explanation: seems reasonable.
During dormancy, seeds wait until the conditions are optimal for cellular respiration. Modifications would include things such as seeding elongation, germination and hormone regulation
Answer:
B. they bring cold , polar winds to the equator
