Nerve cells send messages in a process that involves the movement of potassium ions rushing out of the cell and then being pumped back inside the cell. These processes allow homeostasis to be maintained in the nervous system
Which two observations support the conclusion that the movement of potassium ions involves active transport? Select two answer choices

Which way do the nitrogenous bases in dna pair up? a. a and g; t and c b. a and c; t and g c. a and t; g and c d. a and a; t and t; g and g; c and c

Gregor mendel is best known for his work with pea plants and for uncover many of the mysteries of genetics. one of his major findings stated that there were specific, physical units of inheritance that are transmitted during reproduction. what is the the name given to these units of inheritance which can be found on chromosomes? a) centromeres b) cytoplasm c) genes d) nucleotides

Which kind of worm has a closed circulatory system? a planarian b fluke c pinworm d an earthworm