Answer:
All cells are surrounded by a cell membrane. The cell membrane is semipermeable, allowing some substances to pass into the cell and blocking others.
Explanation:
Answer: option C - activating second messengers and stimulating glycogenolysis and gluconeogenesis.
Explanation:
Glucagon is an hormone, produced by the pancreas, that opposes the action of insulin by stimulating the production of SUGAR.
Glucagon is usually released whenever blood glucose levels is detected to be LOW. it works by activating secondary messengers.
Answer:
In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure. ... DNA and histone proteins are packaged into structures called chromosomes.
