8.4 Protein Functions Flashcards
What are the main functions of protein?
To provide body structure Transport Speed up chemical reactions Movement Fluid Balance Protection from Disease Energy (not it's main function)
Bones, muscles, skin and every organ contains _______
protein
What is the main structural protein called? (Bones and connective tissue are made of this)
Collagen
What is elastin? What does it permit?
Another key structural protein. Permits elasticity
Why is collagen used for structure?
When it wraps together, it has very good structural integrity
What is a good example of a body part that contains lots of elastin?
Ear
How do protein facilitate transport?
Protein tracks in cells allow substances to walk along them, permitting transport around the cell
Protein channels regulate movement into and out of the cell
The blood protein hemoglobin transports oxygen around the body
Hemoglobin has 4 sites for ____ and ______
iron, oxygen
How do proteins speed up chemical reactions?
Most enzymes are proteins, such as sucrase
How do proteins facilitate movement?
When myosin proteins attach to actin proteins and kink their heads, muscle contractions occurs as actin tracks shorten
What is myosin and actin?
Protein found in muscle that facilitate movement
How do proteins facilitate fluid balance?
Water is attracted to positive and negative charges of the amino acids found in blood proteins.
This draws water into blood and out of extracellular space
What can cause edema?
When blood proteins are low and fluid builds up into the extracellular space
How do proteins protect you against diseases?
Collagen in skin helps to restrict what can enter the body
Y shaped proteins called antibodies stick to infectious agents, promoting their removal and limiting their harm by promoting clumping
What is it a waste to deaminate amino acids for energy?
The body prefers to use protein for all its various other functions
