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Sonbull [250]
3 years ago
5

What ion movement changes the membrane potential in a contractile cell from negative to positive during the rapid depolarization

phase?
Biology
1 answer:
Lesechka [4]3 years ago
8 0

Answer:

The influx of calcium ions.

Explanation:

The influx of calcium ions at a certain point produces phase of the action potential also called depolarization which results in the ion movement changes the membrane potential from negative to positive inside the cell.

In action potential, calcium ions may control gene transcription, cell excitability, and neurotransmitter release. In chemical synapses, the influx of calcium ions leads to vesicles filled with neurotransmitters move to the surface of the cell, and into the synaptic cleft release their contents.

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the esophagus is the tube that connect the mouth to the stomach. heartburn occurs when some kf the stomach juives flow backwards
beks73 [17]

<u>Answer:</u>

To help relieve heartburn, a person should take medicine that is 'Over-the-counter (OTC) antacids and acid blockers'.

<u>EXPLANATION:</u>

  • Heartburn is a very common symptom of a condition called Gastroesophageal reflux disease.
  • This affects the lower part of the esophageal sphincter and also the muscle ring-like connection between the 'esophagus and stomach' which tends to infuse a backward flow of the stomach secretions.
  • Along with some dietary and life style changes, the intake of antacids and acid blockers can help in the relieve of the symptoms of occasional heartburn.
6 0
3 years ago
What happens to contraction of a muscle cell if some of the Ca2+ that was released during a contraction is still in the cytoplas
Kazeer [188]
<h2>Muscle contraction in cytoplasm </h2>

Explanation:

  • Calcium stays in the sarcoplasmic reticulum until discharged by an improvement. Calcium at that point ties to troponin, causing the troponin to change shape and expel the tropomyosin from the coupling destinations. Cross-connect stick proceeds until the calcium particles and ATP are never again accessible.
  • ATP is basic to get ready myosin for official and to "revive" the myosin.
  • When the actin-restricting destinations are revealed, the high-vitality myosin head overcomes any issues, framing a cross-connect. When myosin ties to the actin, the Pi is discharged, and the myosin experiences a conformational change to a lower vitality state. As myosin consumes the vitality, it travels through the "power stroke," pulling the actin fiber toward the M-line.

4 0
3 years ago
The effects of epinephrine are typically observed within
Galina-37 [17]

Answer:

70mins

Explanation:

i don't have one I just know

8 0
3 years ago
Function of plasma membrane​
Yuki888 [10]

Answer:

The plasma membrane, or the cell membrane, provides protection for a cell. It also provides a fixed environment inside the cell. And that membrane has several different functions. One is to transport nutrients into the cell and also to transport toxic substances out of the cell.

3 0
2 years ago
Which of the following would indicate that a person has developed a hereditary form of hypertension
Salsk061 [2.6K]

The hereditary form of hypertension is detected when the adrenal gland produces too much aldosterone.

<u>Explanation:</u>

Hypertension is an important risk factor for several cardiovascular disease. If prolonged it damages the blood vessels causing malfunctioning of the heart, kidneys and brain. Hypertension can be caused due to various genetic or environmental factors.

There are cases where familial hypertension are detected. This is caused due to the mutation in a single gene which is passed on to the generations where even in young age the children are seen affected with hypertension.

This in medical terms is termed as familial hyperaldosteronism type II. This is occurred due to the mutation in CLCN2 gene. It tends to produce too much of aldosterone hormone which causes high blood pressure.

5 0
3 years ago
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