Unit 10 - Objective 1

What are the contractile proteins?

Actin and Myosin

What is dystrophins purpose?

Anchor various proteins to the cell

What are the 4 basic functions of the muscular system?

Body movement Body position Store and move substances w/in the body Generating heat

What does elastin do?

Give muscles their stretch

What does titin, actin, and nebulin do?

Maintain the structure and shape of muscle fibers.

What is the end result of depolarization?

Muscle contraction (shortening of fibers)

Which of our contractile proteins pull on the other?

Myosin pulls on Actin.

What causes depolarization?

Nervous system, endocrine system, or reaction to intercellular signaling molecules.

What are the 3 types of muscle tissue?

Skeletal, Cardiac, Smooth

What does it mean that muscle tissue is "excitable"

That the electrical state of the plasma membrane can change.

What is depolarization?

The change of the electrical state of the plasma membrane

What are the structural proteins

Titin, Actin, Nebulin, Dystrophin, elastin

What are the regulatory proteins?

Troponin and tropomyosin

What is another word for muscle cells?

muscle fibers

What do regulatory proteins do?

prevent some muscle contraction in the absence of nervous system stimulation.