The Action of Ca²⁺ in a Second Messenger Scheme

question 21

Multiple Choice

The action of Ca²⁺ in a second messenger scheme

• A) involves the calcium-binding protein calmodulin as the actual second messenger
• B) relies entirely on intercellular reservoirs of Ca²⁺ in the endoplasmic reticulum
• C) does not involve the G protein
• D) produces sustained responses by controlling the flow of Ca²⁺ into the cell

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