When a muscle receives nerve signal contracts and pulls on a tendon.
Answer:
An ionic bond is formed by transfer of electrons between metals and non-metals.
Explanation:
Ions that have opposite charges will form an ionic bond in such a way that total charge on the compound is 0.
Answer: High density lipoproteins (HDL)
High density lipoprotein can transport back cholesterol and sometimes called "good cholesterol". Patient with too low high-density lipoprotein will be considered having dyslipidemia(disturbance in cholesterol concentration) when other cholesterol considered as dyslipidemia if its too high.