Topic 11-13

What does the nervous system allow animals to do? Select all that apply.

• Produce enzymes

• Regulate internal body function

• Skeletal muscle movement

• Learning and memory

T/F: Ganglia process sensory information from a far region which result in signal of a motor neuron

• True

• False

T/F Na+ channels open more slowly than K+ channels

• True

• False

T/F Myelin sheath in Schwann cells allow signals to travel extra fast

• True

• False

T/F the membrane returns to resting with the help of Na+/ K+ pump

• True

• False

What needs to happen for an AP to be produced through EPSPS? Select all.

• Multiple EPSPS set off relatively close in time

• Single EPSPS set off at two or more different synapses

• Multiple EPSPs spaced out in time

• Single EPSPS set off but not near the same axon hillock

In which direction does Na+/ K+ pump move ions across the cell membrane?

• Na+ ions in, K+ ions in

• Na+ ions out, K+ ions out

• Na+ ions in, K+ ions out

• Na+ ions out, K+ ions in

When does cancellation of an AP occur?

• When EPSPs happen at different times

• When an IPSP and EPSP cancel each other out

• When multiple EPSPs arrive at a single synapse that are then disqualified by an IPSP

• When the EPSP is larger in magnitude than the IPSP

What happens during the refractory period in action potential peak?

• Na+ ions leave the cell, allowing the membrane potential to return to rest

• K+ ions leave the cell, allowing the membrane potential to return to rest

• K+ ions leave the cell, allowing the membrane potential to return to be hyperpolarized

• Na+ channels remain inactivated, unable to produce another AP

What causes neurotransmitter release from the presynaptic membrane?

• AP activation from depolarization through sodium ions

• AP activation from depolarization through potassium ions

• AP activation from depolarization through calcium ions

• No AP has to occur, it just needs to be depolarized a little