Which of the following statements is true?
a. The spine evolved as an adaptation for swimming in fish.
b. Some organisms have vestigial genes.
c. Enantiostasis involves a change in two variables.
d. Two of these.
e. All of these.
e
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Which of the following statements about the action potential is false?
A) The rapid depolarization phase is caused by the entry of potassium ions. B) During the repolarization phase, sodium channels close and potassium channels open. C) During the depolarization phase, membrane potential becomes positive. D) During the hyperpolarization phase, the ion pumps re-establish the sodium and potassium concentrations across the cell membrane. E) Repolarization occurs as potassium ions leave the axon.
What is the effect of acidosis on the body? Of alkalosis?
What will be an ideal response
Which of the following movements is possible at the hip joint?
A. Adduction B. Rotation C. Flexion D. Circumduction E. All of the choices are correct.
What is the function of CREB in long-term memory?
A. Opens Ca2+ channels B. Addition of AMPA receptors C. Activates genes to make proteins such as dendritic spines D. Draws more glutamate into the neuron