Exam 7: Muscular System

Curare is a poison used by South American Indians. It is known to bind to ACh receptors preventing the binding of ACh. What effect would it have on muscle function?

-All of the following are the effects of aging on the muscular system EXCEPT:

A chemical that is considered an acetylcholine antagonist:

Aerobic respiration:

A muscle fiber will not respond to a stimulus until that stimulus reaches the

Which of the following motor units would allow for greater muscular control?

Actin myofilaments

The anterior hip muscle that flexes the thigh is the

In __________ contraction the amount of tension increases during contraction, but the length of the muscle does not change.

In a neuromuscular junction,

The specific molecules that provide calcium binding sites on actin are __________ molecules.

Cardiac muscle

Muscles that work together to cause movement are called

The normal resting cell membrane is the most permeable to

In a resting cell, K⁺ ions have a higher concentration ______ the cell, which results in the net movement of K⁺ _______ of the cell.

Excitability is the ability of skeletal muscle to

If someone winks at you, they are using their

Satellite cells:

The characteristic that allows muscles to have a slow, smooth, sustained contraction is

Which of the following muscles are used to elevate the larynx?