The sodium-potassium pump transports three sodium ions out for every two potassium ions it brings into a cell. Both ions are moved against their concentration gradients which means it must rely on which molecule in order to function?
A. H2O
B. C6H12O6
C. NADH
D. ATP
Answer: D
You might also like to view...
The neonatal period extends
A) for the first 24 hours of life. B) for the first month of life. C) until the first birthday. D) for the first six months. E) until breast feeding stops.
Match the part of the neuron to its description (answers may be used more than once).
1. may be covered with myelin 2. receive(s) most of the incoming synapses 3. occupy(ies) the least amount of cell volume 4. make(s) proteins necessary for repair of damaged neuron 5. contribute(s) most to membrane surface area of cell 6. supported by satellite cells 7. where most graded potentials originate 8. location of voltage -gated ion channels A. dendrites B. axon C. cell body
Human somatic cells contain only one pair of
A. homologous chromosomes. B. chromosomes. C. autosomes. D. sex chromosomes.
A weak acid was introduced to a solution. Which of the following accurately describes the condition of the solution after adding the weak acid?
A. The solution would have an increase in H+ with some of the weak acid molecules still intact. B. The solution would have a decrease in H+ with none of the weak acid molecules still intact. C. The solution would have an increase in H+ with none of the weak acid molecules still intact. D. The solution would have a decrease in H+ with some of the weak acid molecules still intact.