Exam 8: Movement

Black widow spider venom affects movement by blocking receptors for acetylcholine in the postsynaptic membrane.

The force of a movement is most directly controlled by 

In addition to its involvement with motor disorders,which of the following structures has been implicated in obsessive-compulsive disorder and attention deficit/hyperactivity disorder? 

Nutrients are moved through the digestive tract by _________ muscle.​ 

Without input from the gamma motor neurons,​ 

Abnormalities in muscle fiber proteins characterize 

What is the function of striated muscles?​ 

Quadriplegia usually results from 

People with spinal cord injuries show a loss of _________ muscle fibers.​ 

A single alpha motor neuron and the muscle fibers it innervate are known as a(n)​ 

An athlete with likely potential in Olympic weightlifting would probably have _________ in the quadriceps muscle.

A Z line is ​ 

Neurons controlling voluntary movement of the head are located in the 

Motor neurons are​ 

In humans,which of the following body parts probably has the greatest corresponding area of primary motor cortex? 

Spinal motor neurons responsible for contracting muscles are known as _________ motor neurons.​ 

Taiwanese cobra venom 

When an Olympic weightlifter uses explosive strength to lift a personal best,the _________ fibers in her legs are probably the most active,but the marathon runner relies on her _________ fibers.​ 

The corticospinal tract crosses the midline at the level of the 

Age-related changes in muscle function​