Liver is the largest gland in human body. It is also the largest (internal) organ in our body and can weigh up to 1.5-1.6 kg for a human adult. That is, about 1/50th of the body weight is because of liver.
Answer: Substances that are protein based cannot cross the lipid cell membrane, but can exert their effect by binding to the proteins based receptors present on the lipid bilayer.
Explanation:
Hormones such as calcitonin , Parathyroid hormone and pituatry horomones are proteins and water soluble.They cannot cross lipid bilayer but can bind to ligand binding protein receptors.
These receptors are protein macromolecules that are specific in nature for specific hormones.
After binding to the receptors, these hormone-recpetor complexes activate second messengers and regulate the downstream effects.
Polaris (aka the North Star) has a radius of around 22 million miles, which is about 50 times the size of our sun!
False. A chemical change needs to occur in order for a new substance to be created.
Electron Transport Chain located in the Mitochondria.
I don't see any answer options so that's my best guess
