Exam 8: A--Muscle Physiology

Complete each of the following statments. The most common need for additional oxygen after rigorous exercise is for the repayment of the ____________________, when activity was being supported by creatine phosphate and glycolysis.

To pick up something heavier than your pencil, your nervous system could

According to the sliding filament mechanism of muscle contraction, the thick filaments slide in closer together to shorten the sarcomere.

The thick filaments in a sarcomere contain cross bridges.

With the type of lever system exemplified by flexion of the elbow joint, when an object is held in the hand, the

Identify the characteristic(s) shared by all types of muscle tissues?

Skeletal muscle fibers

Complete each of the following statments. ____________________ refers to paralysis of the legs resulting from lower spinal cord injury.

Skeletal muscles are capable of limited repair after injury.

Complete each of the following statments. Twitch summation is similar to the ____________________ summation of EPSPs.

Muscular fatigue can be caused by

An action potential rapidly spreads to the central portions of a muscle cell by means of the

A lack of ATP in a skeletal muscle cell would most likely cause

In the body's lever systems, the fulcrums are represented by the

The heart initiates its own action potentials without any external stimulation.

Repaying the oxygen deficit involves the formation of lactate in fatigued muscles.

A functional syncytium of cardiac muscles cells means that they

Complete each of the following statments. After the power stroke, ____________________ binds with the cross bridge, which causes the cross bridge to detach from the ____________________, which is part of the thin filament.

Order the following muscle cell components from larger to smaller 1. troponin 2. myofibril 3. sarcomere 4. thin filament 5. muscle fiber

The H zone of the sarcomere consists of myosin but does not contain actin.