Calcium in cells acts as second messenger molecule which regulates the very important physiological and cellular process of cell-like neurotransmission, cell migration, secretion, fertilization and many others.

Calcium acts as a messenger by binding to a calcium-binding protein called calmodulin. Calmodulin forms complex with 4 calcium ions through the side amino acids present in the structure of calmodulin.

Thus, calmodulin is the correct answer.

6 0

3 years ago

To be injured by an animal with poisonous spines, you must: Select one: Be within a radius of 3 m/10 ft, as most poisonous anima

Mama L [17]

To be injured by an animal with poisonous spines, you must: be the aggressor and touch the animal first.

<h3>What is the use of spines in animals?</h3>

Spines are hard, needle-like anatomical structures found in both vertebrate and invertebrate species.
The spines of most spiny mammals are modified hairs, with a spongy center covered in a thick, hard layer of keratin and a sharp tip.
Spines on an animal’s body help defend it.
They can be irritating or painful, or difficult to swallow.
Spines are also important tools for communication, shock absorption, and rain protection.
Animals like porcupine shoot their spines (quills) for defense. Some spines can also pass through gloves.
To prevent attacked by an animal with poisonous spines you must remain calm and observe your surroundings.

Learn about plant spines here:

brainly.com/question/823927

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7 0

2 years ago