The type of active transport which helps muscle cells to contract is called SODIUM POTASSIUM PUMP. In humans, sodium and potassium ions are pumped in opposite direction across the membrane, this builds up an electrical and chemical gradients which drive other transport processes.
Answer:
there must be as equal number of atoms of each element on both sides of the equation
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1.) antigens present on the invaders.
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This question had choices:
A. nitrogen
B. hydrogen
C. water
D. ozone
<span>Miller and urey model is inconsistent with the finding that earth's early atmosphere lacked D. OZONE.
The Miller and Urey experiment used </span> water<span> (H</span>2<span>O), </span>methane<span> (CH</span>4<span>), </span>ammonia<span> (NH</span>3<span>), and </span>hydrogen<span> (H</span>2<span>).
Given the choices, ozone is not part of the experiment. Ozone is a chemical compound with formula O3. </span>