Question

question 7 1 pts the active transport mechanism in the plasma membrane that transports sodium and potassium ions in opposite directions and at different rates is the ion pump. chloride channel. sodium - potassium channel. sodium - potassium pump. question 8 1 pts the difference between sodium and potassium in the generation of action potential is that: sodium causes repolarization of the cell membrane, and potassium causes depolarization of the cell membrane. sodium causes depolarization of the cell membrane, and potassium causes repolarization of the cell membrane. sodium causes repolarization, and potassium is not required in the action potential mechanism. sodium causes unipolarization of the cell membrane, and potassium causes repolarization of the cell membrane. question 9 1 pts the tiny bulge at the end of a terminal branch of a presynaptic neurons axon is called a(n) receptor site. telodendria. synaptic cleft. synaptic knob.

Explanation:

• Question 7: The sodium - potassium pump actively transports sodium and potassium ions in opposite directions and at different rates across the plasma membrane.
• Question 8: During action potential generation, sodium influx causes depolarization of the cell membrane and potassium efflux causes repolarization.
• Question 9: The tiny bulge at the end of a terminal branch of a presynaptic neuron's axon is called the synaptic knob.

Answer:

Question 7: sodium - potassium pump
Question 8: sodium causes depolarization of the cell membrane, and potassium causes repolarization of the cell membrane
Question 9: synaptic knob