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Vesnalui [34]
3 years ago
7

3.The reduced potential causes hundreds of a)________________________ channels to open on that part of the cell membrane. The de

polarization of the cell causes more b)_________________ channels to open in adjacent parts of the cell membrane. This begins the wave of c)____________________ moving down the axon. Depolarization begins at the d)______________________.
Biology
1 answer:
wlad13 [49]3 years ago
8 0

The reduced potential causes hundreds of <u>voltage-gated sodium</u> channels  to open on that part of the cell membrane. The depolarization of the cell causes more of <u>voltage-gated sodium </u>channels to open in adjacent parts of the cell membrane. This begins the wave of of <u>depolarization</u>  moving down the axon. Depolarization begins at the <u>axon hillock.</u>

Explanation:

When there is no neuron signaling it becomes polarized, termed as resting membrane potential (RMP) at a threshold voltage (around -55 mV), due to the action of the sodium-potassium pump and the potassium leak channels.  

When a change in the RMP occurs, depolarization takes place which causes the voltage-gated sodium channels to open and sodium ions rush into the nerve cell which in turn will increase the voltage threshold to nearly around +40 mV and also charges the neuron positive. This depolarization moves down the axon. This increase in threshold stops the sodium influx and opens the potassium channels to rush the potassium out of the cell.

All these actions decrease the membrane potential leading to a wave of depolarization and going back to resting state. Depolarization begins depending upon the potential gradient at the axon hillock.

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Which of the choices below is the salt level-monitoring part of the nephron?
WINSTONCH [101]

Answer:

c. macula densa

Explanation:

The cells of the macula densa are sensitive to the concentration of sodium chloride in the distal convoluted tubule. They are a part of the nephron.

5 0
3 years ago
Compare hypertonic, hypotonic, and isotonic solutions. When an environment is hypotonic, what happens to the cell?
algol13

When an environment is hypotonic, the cell has more solute so solvent move from outside the cell to inside causing the cell to swell.

WHAT IS TONICITY?

  • Tonicity is the ability of a solution to induce water loss or water gain in a cell. A solution can either be; hypertonic, hypotonic or isotonic

  • A hypertonic solution has more concentration of solute than its surroundings while a hypotonic solution has less concentration of solute compared to it's surroundings.

  • If a hypotonic solution has less solute, this means that it will have more solvent (water). Based on the principle of osmosis, water moves from a region of high concentration to region of low concentration.

Hence, water will move into a cell that is located in a hypotonic environment, causing it to swell.

Learn more: brainly.com/question/13802181?referrer=searchResults

3 0
2 years ago
Ground tissue in plants consists of highly specialized cells that perform certain functions. What is one function of the ground
White raven [17]
<h2>Answer:</h2><h2>Ground Tissue Function</h2><h2>Parenchyma Tissue Photosynthesis Food storage Healing and tissue regeneration</h2><h2>Collenchyma Tissue Support in young stems, roots, and petioles</h2><h2>Sclerenchyma Tissue * Rigid support Protection</h2><h2 />

Explanation:

<h3>Ground Tissue Function</h3><h3>Parenchyma Tissue Photosynthesis Food storage Healing and tissue regeneration</h3><h3>Collenchyma Tissue Support in young stems, roots, and petioles</h3><h3>Sclerenchyma Tissue * Rigid support Protection</h3><h2>hope this helps</h2>
7 0
3 years ago
Is 400 Pints<br> greater than 100 gallons
sveticcg [70]
Yes hope this helps
8 0
3 years ago
Read 2 more answers
How are the bryophytes and seedless vascular plants alike? Group of answer choices Plants in both groups have vascular tissue. I
dangina [55]

Answer:

In both groups, sperm swim from antheridia to archegonia

Explanation:

Bryophytes are the plant group that does not have a vascular system. These plants do not produce seeds. Ferns and horsetails are seedless vascular plants. These plants have vascular tissues (xylem and phloem) to serve in the conduction of water, minerals, and sugars from the one plant part to the other. But these plants do not produce seeds and hence, are seedless vascular plants.

Both bryophytes and the seedless vascular plants depend on water for fertilization. These plants release their male gametes in water which in turn move towards the female gamete. Sperms, the male gametes of these plants swim in the water to reach the female gamete.  

Antheridium is the male gametangium that serves as a site for the production of male gametes while archegonia are the female gametangia where the egg cell is produced.  

6 0
3 years ago
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