Answer:
skeletal, visceral and cardiac muscles are involved in the muscular system
Answer:
Space and stars
Explanation:
You seriously didn't know that.
Receptors detect changes in the environment. For a stimulus to elicit a response, certain cells must have an appropriate receptor. Stimulation of the receptor initiates a specific signal pathway.
Answer:
DNA stands for deoxyribo nucleic acid.
nucleotide is the basic structural and functional unit of DNA.