Lecture Exam 1 Review

Golgi tendon organs...

• Cause muscular contraction when a muscle overly-stretches

• Cause relaxation when a muscle creates too much tension

• Are located in the muscle belly

• Activates an exhibitory response to the CNS

Identify the muscle fiber type based on the following characteristics:

Motor neuron size = Large

Recruitment threshold = High

Contraction speed = High

Fatigue Resistance = Low

Force Production = HIgh

• Type IIb

• Type I

• Type IIa

• Type III

The mitral valve is found in the heart between the ______ and ______.

• Right atrium and right ventricle

• Left atrium and left ventricle

• Left ventricle and right ventricle

• Right ventricle and left ventricle

Name the arm action performed concentrically during a dumbbell bicep curl:

• Adduction

• Extension

• Flexion

• Horizontal Abduction

What is the primary function of the sinoatrial node in the heart?

• To pump blood to the lungs

• To act as the heart's natural pacemaker

• To separate the left and right atria

• To regulate blood pressure

Which type of muscle fiber is known for high endurance and slow contraction speed?

• Type IIb

• Type I

• Type IIa

• Type III

During the concentric phase of the bench press exercise, the muscle force acting upwards is being displaced upwards. This represents an example of ______.

• Negative Work

• Torque

• Positive Work

• Eccentric Muscle Action

Moving the hips into abduction and adduction takes place in which plane of action?

• Sagittal

• Transverse

• Anteropostierior

• Frontal

True / False: Relative muscle strength is greater in males than females.

• True

• False

The principle that states that if a motor unit is activated, all of it's fibers will be as well.

• All-or-none law

• Goodhearts Law

• Size Principle

• Selective Recruitment