Exam 8: Muscular System

What is the product of the anaerobic breakdown of glucose?

What is the main component of thin filaments?

During the motion that extends the upper limb at the elbow, the triceps brachii represents which part of the lever?

Following stenuous exercise, levels of ATP, creatine phosphate, oxygen, and glucose must be returned to normal levels. This situation, called __________, may take several hours to complete.

A broad sheet of dense connective tissue that connects muscle to its origin or insertion is called a(n) ____________.

The enzyme ATPase is located in the heads of myosin molecules.

The muscles of the back that help maintain upright posture while standing still are undergoing what type of contractions?

Consider the components of the lever that causes the flexion of the upper limb at the elbow. The fulcrum of the lever is the __________ and the force to move the rigid bar (the forearm bones) is provided by contraction of the __________.

What is the product of the anaerobic breakdown of glucose?

If frequency of stimulation to a muscle fiber is increased, the force of contraction will increase.

What causes the rigor mortis that occurs in skeletal muscles after death?

Myasthenia gravis is an autoimmune disease in which an individual's own immune system produces antibodies to acetylcholine receptors, blocking or destroying them. What would be a major symptom of this disease?

A(n) __________ is a bundle of dense connective tissue that connects a skeletal muscle to a bone.

What is oxygen debt?

In the initiation ofmuscle contraction, calcium ions bind totropomyosin, exposing active sites on actin for cross-bridge formation.

Which statement describes multiunit smooth muscle?

Troponin, tropomyosin and actin are all parts of the thin filaments.

Muscle fatigue results from a combination of insufficient calcium and an excessof acetylcholine.

In the absence of oxygen, what process is used by muscle cells to generate small amounts of ATP?

Layers of dense connective tissue called __________ separate and support individual muscles.