What level of organization consists of groups of similar looking cells with its surrounding material working together to perform a function?

Homeostasis refers to 

If a solution outside the cell contains a greater concentration of dissolved particles than the contents of the cell, the solution is said to be 

In comparison to the knee joint, the hip joint of the body is said to be

In comparison to the skin, the muscles are

The sodium-potassium pump moves sodium out of the cell three ions at a time and returns potassium ions into the cell two ions at a time.

All of the following refer to a plasma membrane of a cell except

In relationship to the stomach, the spinal cord is

A thrombectomy would be included in which root operation?

Extraperitoneal C-section, low transverse incision