Why Are You Able to Repeatedly Contract and Relax Your

question 72

Multiple Choice

Why are you able to repeatedly contract and relax your muscles of respiration, allowing you to breathe in and breathe out?

• A) As soon as all of the Ca²⁺ stored in the lateral sacs of the sarcoplasmic reticulum is used up, muscle relaxation occurs.
• B) After the muscle cell becomes excited, acetylcholinesterase rapidly destroys acetylcholine.
• C) When there is no longer a local action potential in the muscle cell, Ca²⁺ is actively transported back into the lateral sacs of the sarcoplasmic reticulum, and muscle relaxation occurs.
• D) Both (b) and (c) above.
• E) All of these answers.

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Definitions:

Tax Revenues

The income that is gained by governments through taxation, which is then used to fund public services and infrastructure.

Deadweight Loss

The loss of economic efficiency that occurs when the equilibrium outcome is not achievable or not achieved in a market.

Tax Revenue

The financial earnings acquired by governments via taxation.

Deadweight Loss

The shortfall in economic efficiency arising when a market for a good or service does not meet or cannot meet the equilibrium point.