The Most Important Factor in Decreasing the Intracellular Concentration of Calcium

question 51

Multiple Choice

The most important factor in decreasing the intracellular concentration of calcium ion after contractionis

• 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.

---

Definitions:

Calcium Carbonate

A chemical compound used as a dietary supplement or antacid; it's also the main component of limestone.

Spongin

A fibrous protein that makes up the skeleton of many sponges.

Spicules

Small, spike-like structures found in various organisms, such as sponges and some animals, serving as structural supports or defense mechanisms.

Invertebrate Animals

Animals lacking a vertebral column, including species such as insects, mollusks, and crustaceans.