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Sergio [31]
3 years ago
14

The most recent major ice age in North America extended as far south as _____.

Biology
1 answer:
pishuonlain [190]3 years ago
4 0

Answer:

Nebraska and Iowa.

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When an action potential arrives at the axon terminal of a motor neuron, which ion channels open?
HACTEHA [7]

Answer:

Calcium voltage gated ion channels

Explanation:

There are two types of ion channels involved in the neuromuscular junction and end plate potentials: voltage-gated ion channel (responsive to changes in membrane voltage which cause the voltage gated ion channel to open) and ligand-gated ion channel (responsive to certain molecules such as neurotransmitters).

The resting membrane potential of a motor neuron goes from -70mV to -50 with a higher concentration of sodium outside and a higher concentration of potassium inside. <em>When an action potential propagates down a nerve and reaches the axon terminal of the motor neuron, the change in membrane voltage causes the calcium voltage gated ion channels to open allowing for an influx of calcium ions. </em>These calcium ions cause the acetylcholine vesicles  to release acetylcholine via exocytosis into the synaptic cleft.

I hope you find this information useful and interesting! Good luck!

3 0
3 years ago
The sub discipline of exercise science that deals with the nervous system, the muscles, reaction time is
Elena L [17]
Not sure but I think motor systems?

-Wulf
8 0
3 years ago
A Venus flytrap closes around a small insect. Which life characteristic does this illustrate? A. reproduction B. response to sti
Mnenie [13.5K]
The answer is B: Response to stimuli
what response to stimuli means is that the organism reacts to something around it
the venus flytrap wouldn't just randomly close for no reason
it had to sense the fly, and react by closing.

it's not permeability because permeability means allowing things to pass through like soaking up water
unless your teacher is referring to absorbing the nutrients of the dead fly after it's been killed
but I don't think that's what this question is about
:)
6 0
3 years ago
Stop it. Get help. Oh wait you are.
Galina-37 [17]

Answer:

im fine.

at the moment

Explanation:

6 0
3 years ago
Plant respiration refers to?
Fynjy0 [20]

Answer:

A

Explanation:

4 0
3 years ago
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