Health, 30.10.2020 14:00 Dallas3506

Consider what occurs when calcium is present inside a sarcomere. Based on this knowledge, predict what the result would be If calcium entered a sarcomere, but where UNABLE to leave the
sarcomere.

Answers: 1

Show answers

Answers

Since calcium is an ion that allows the contraction of the sarcomere, if the calcium does not leave the sarcomere the muscle contraction is maintained and the sarcomere is unable to relax.

Explanation:

Calcium (Ca²⁺) is necessary for muscle contraction to occur. Once the muscle fiber receives the signal that starts the contraction, cytoplasmic Ca²⁺ levels increase —by intracellular Ca²⁺ release and extracellular Ca²⁺ input—causing muscle contraction.

If for some circumstance the cytoplasmic Ca²⁺ levels do not decrease, muscle contraction would be maintained with no possibility of relaxation. This is a brief summary of the process by which Ca promotes muscle contraction:

Tropomyosin is a molecule that blocks the bond between actin and myosin. Ca²⁺, found in the sarcoplasmic reticulum, exits the sarcoplasm and binds to troponin C, whose interaction with tropomyosin leaves actin and myosin free to bind. Ca²⁺, in a high concentration, promotes the union of the filaments, shortening the muscular fiber and producing the contraction.

The Ca²⁺ pumps of the sarcoplasmic reticulum and the Na⁺/Ca²⁺ exchanger decrease the levels of intracellular Ca, by storing it again in the reticulum or taking it to the extracellular space, respectively. This decreases intracellular Ca²⁺ concentrations.

If this process does not occur properly, Ca²⁺ levels remain elevated and muscle contraction is maintained, without relaxation occurring.

Answer from: Quest

it would be a lot of diff ones. hope this ! < 3 : )

Answer from: Quest

20 times a minute is usually the average respritory rate of an adult. additionally the patient is breathing on his own, is clearly maintaining his airway, and is intaking a sufficient amount of air. you shouldn't use a bag valve mask, cpap, or other form of positive pressure ventilation, unless the patient has lost control of his airway, and is not breathing (apneic) or has rapid breathing or slow and shallow respirations. this patient would most likely and should be put on an non-rebreather mask or nrb attached to 100% high flow oxygen at 15 l/min. don't use a nasal cannula, as the amount of oxygen it provides is limited with a rate of 6 l/min.

Another question on Health

Health, 22.06.2019 11:30

Blood cells bring oxygen to cells and take carbon dioxide away. true or false

Answers: 1

Answer

Health, 23.06.2019 00:00

Which of the following must be treated under the care of a physician and is mainly considered a medical condition? a. scoliosis b. lordosis c. kyphosis d. all of the above

Answers: 1

Answer

Health, 23.06.2019 04:00

Which of the following could use reverse transcriptase to transcribe its genome? a) ssrnab) dsrnac) ssdnad) dsdna

Answers: 1

Answer

Health, 23.06.2019 16:10

Susan’s wrist is tired from typing on her keyboard all day. she moves her wrist in a circle to stretch it out. what type of movement does her hand make around her wrist?

Answers: 2

Answer

You know the right answer?

Consider what occurs when calcium is present inside a sarcomere. Based on this knowledge, predict w...

Questions