BIOLOGY HIGH SCHOOL

He most important factor in decreasing the intracellular concentration of calcium ion after contraction is A) active transport of calcium across the sarcolemma.
B) active transport of calcium into the sarcoplasmic reticulum.
C) active transport of calcium into the synaptic cleft.
D) diffusion of calcium out of the cell.
E) diffusion of calcium into the sarcoplasmic reticulum

Answers

Answer 1
Answer:

Answer:

B. Active transport of calcium into the sarcoplasmic reticulum.

Explanation:

Calcium ions (Ca2+) are released from sarcoplasmic reticulum during the onset of muscle contraction. This increases the intracellular concentration of calcium ions.

The propagation of last action potential through T tubule is followed by active pumping of calcium ions from sarcoplasm to back to the sarcoplasmic reticulum by Ca2+-ATPase pumps. This pumping of calcium ions back to the sarcoplasmic reticulum lower down the intracellular calcium ion concentration after muscle contraction.


Related Questions

COLLEGE

There are at least two things related to barb's medical history that may be of interest to a doctor. what are those two things? answer

Answers

The two things that the doctor may be of interest to barb’s medical history is her hip replacement procedure and her asthma. Although her hip replacement procedure was done long ago but she should still be cautious on her movements especially carrying her grandchildren or bringing heavy load. Moreover, her asthma attack must also be carefully monitored particularly her labored breathing pattern.

COLLEGE

How does the presence of a cavity containing fluid influence the amount of friction generated?

Answers

The more fluid there is in the cavity, the less fluid there is generated. This is because the water cushions the force and lessens the friction. For instance, you will notice that if you rub your hands over a balloon filled with water, there isn't much friction at all.

Answer:

The more fluid there is in the cavity, the less fluid there is generated. This is because the water cushions the force and lessens the friction. For instance, you will notice that if you rub your hands over a balloon filled with water, there isn't much friction at all.

Read more on Brainly.com - brainly.com/question/5711576#readmoreExplanation:

MIDDLE SCHOOL

Most of the fossils found in Virginia are in the Coastal Plain, Valley, Ridge, and Appalachian Plateau regions, BEST suggesting that these geographic provinces A) were once covered by seawater.
B) are the oldest parts of Virginia.
C) have a great deal of karst topography.
D) have large amounts of sedimentary rock.

Answers

The BEST suggesting that these geographic provinces have large amounts of sedimentary rock.

D) have large amounts of sedimentary rock.

Explanation:

Examples can be found in a few geologic regions in Virginia, including the Coastal Plain, the Mesozoic Basins, the Valley and Ridge, and the Appalachian Plateaus. Virginia likewise consolidates exceptional and bizarre fossils in Piedmont and Saltville.

Resorts directly got from this district are limestone, dolostone, sandstone, gypsum, iron oxides, earth, oil, characteristic fume and rock. These Appalachian and Cumberland Plateaus limit the Valley and Ridge with a great part of the western edge of the state.

Answer:

the answer is d

Explanation:

MIDDLE SCHOOL

Why don't roots photosynthesise?

Answers

they don't consist of chlorophyll which adds to the green colour of leaves as well as helps in trapping sunlight (in leaves)..........spores under leaves help in taking in air from atmosphere (also give out )........and roots basically transport water and important minerals from soil to leaves.

All these structures  help in obtaining components necessary for photosynthesis BUT DO NOT UNDERGO PHOTOSYNTHESIS.........it is the leaves which do this.

so to conclude, roots just help in completing  the required components necessary for photosynthesis but do not perform it.

HOPE IT HELPED !!!!!

In order to photosynthesise, there must be light. Since the roots are under the ground, they can't see the light and use it to generate energy. 

Therefore the roots don't have chlorophyll and can't photosynthesise
HIGH SCHOOL

The site of DNA replication is called A. a replicon
B. a double helix
C. DNA polymerase
D. a replication bubble

Answers

The correct answer is D. a replication bubble. Hope this helps!
MIDDLE SCHOOL

PLEASE HELP!! :) Many body systems work together for proper functioning of the body and to maintain internal homeostasis.

The ___________ works to break down food eaten before exercising. The ___________ takes in the nutrients obtained from the food. The body sweats as a mechanism to cool off, because the _____________ is working to flush out toxins.


1.

a) circulatory system
b) digestive system
c) excretory system


2.

a) circulatory system
b) digestive system
c) excretory system


3.

a) circulatory system
b) digestive system
c) excretory system

Answers

Answer: Digestive system, circulatory system, excretory system

Explanation:

The body works in a proper condition by the coordination of different types of system that is present in the body. The food that we eat is broken down into simpler forms to be utilized by the body.

This is the function of digestive system

The nutrients, vitamins and minerals are absorbed and circulated to every part of the body by Circulatory system. The body sweats as a mechanism to cool down the body temperature in response to the outer environment.

This is done in order to maintain homeostasis. This is controlled by excretory system of the body.

Answer:

Every number gives the same result - it should be B) - A) - C).

Explanation:

This answer needs no elaboration, unless you have more questions regarding it.

COLLEGE

Which term defines a well-tested, scientifically supported statement that explains how something works?

Answers

The term is called THEORY.
In scientific investigation, a theory is a well substantiated explanation of how a particular phenomenon works based on the set of facts which had been repeatedly confirmed through observations and experiments. A scientific theory gives reliable account of a phenomenon.

The answer is d.theory

HIGH SCHOOL

What type of flora can be found in a tropical wet climate zone

Answers

Tall, dense, with broad leaf trees
HIGH SCHOOL

Made when sediments fill in a cavity made when an object decayed and the sediments harden into rock

Answers

Answer:

A fossil is formed when a plant, animal or other organism dies. The soft tissues of these organisms gets decomposed and degraded by decomposers present in the soil. The remaining hard and undecayed part like wood, shells, skeleton are left. These remains are covered by layers of soils. These layers of soil gets compacted to produce rocks. The rocks exhibit the dead remains are called as cast. A cast is also termed as mould fossil. It is the general form of the original organism.  

Therefore, the description: Made when sediments fill in a cavity made when an object decayed and the sediments harden into rock is cast.

The Answer to this question is Cast

Random Questions
Was the United States justified in going to war against Mexico in 1846? Please review my answer. Answer: I would say that Yes, the United States was and is justified for going to war against Mexico in 1846. The reason for this is because in 1884, Mexico started the War when they attacked the Army that was led by General Zachary Taylor who was order by the United States to defend the territory on the Rio Grande that was in fact claimed by the United States of America. But, it was owned as a consequence because of the treaty between Texas and Mexico when Texas first became independent. The United States of America tried to be peaceful and negotiate the disputed territory that had once been part of Texas. The United States of America did this by sending John Slidell to Mexico City that was empowered at that time to offer Mexico substantial amounts of money for the disputed territory. IF, big IF, the United States of America had seriously provoked the war and would have taken advantage of the fuzziness that was going on with the relevant treaties, then the people in the relevant regions which included Texas and Alta California, would have been better off under the control of America then they would if they were under control of Mexico. And the reason for this is because while this was all going on, Mexico was corrupt and confused at the time because of the Presidency changing hands rapidly and also because of the democratic traditions being abandoned along the way. AND, in some cases but very few, there were settlers that were originally Americans, had asked to be part of the United States of America!! Now, the only basis that Mexico could claim was any superior lands right to rule that piece of land was that they had to conquer that piece of land first. Now the Spanish aristocracy of Mexico didn’t even have an “original village settler” to claim the lands. The reason for that is Mexico had already acquired them by conquering and displacing the Indian and Mesoamerican inhabitants.