kinesiology 2

Regarding the angle of pull, a muscle would be most effective in moving a joint when its angle of pull is at _____ degrees.

84

Which of the following is affected by the shape and size of a muscle?

Ability of a muscle to produce force

Muscles provide all of the following except?

Attachment points for other muscles

Which of the following is a true statement regarding agonist muscles?

Causes a joint motion through a specified plane of motion when contracting concentrically

Which of the following is not true regarding concentric muscle contractions?

Commonly described as being a negative type of contraction

Which of the following is true regarding concentric muscle contractions?

Contractions cause movement against gravity or resistance

1. The shape and arrangement of muscle fibers affect the muscle's ability to relax.

FALSE

Eccentric muscle "actions" result from isometric muscle contractions.

FALSE

Fusiform muscle fiber arrangement results in a circular pattern.

FALSE

The synergist muscle of an activity is considered to be the primary mover

FALSE

Which of the following is a proprioceptor associated with muscle tissue?

Golgi Tendon Organ

Which of the following is not true with respect to an isometric muscle contraction?

Is considered to be a dynamic contraction

Which of the following is a true statement regarding synergist muscles?

Known as guiding muscles

Which of the following is not a true statement regarding isokinetic exercise?

Muscular contraction occurs only through part of the movement

43. Which of the following is the basic functional unit of the nervous system responsible for generating and transmitting nervous impulses?

Neuron

Which of the following is not a classification of neuron type?

Peripheral

Each muscle in the human body may be innervated by a single nerve or multiple nerves.

TRUE

Which of the following statements is true regarding isometric muscle actions?

Tension is developed within a muscle but joint angles remain constant

Which of the following is true regarding an eccentric muscle action?

The force developed by the muscle is less than that of the resistance

Which of the following is not true regarding an eccentric muscle action?

Typically called a positive type of muscle contraction

Which of the following is a true statement regarding stabilizer muscles?

are essential in establishing a relatively firm base for the more distal joints to work from when carrying out movements

Which of the following is not a property of skeletal muscle tissue that allows for force production and movement about joints?

constrictability

21. Antagonist muscles are known as primary or prime movers or muscles most involved in a joint action.

false

6. Isokinetic muscle contractions involve a dynamic movement wherein the speed of movement is variable.

false

Contractility is the ability of muscle to contract and develop tension or internal force in the same direction as a resistive force when stimulated.

false

Eccentric muscle contractions are referred to as muscle actions instead of a contraction since the muscle is shortening as opposed to lengthening.

false

It is not possible for a muscle to cause more than one action in an associated joint.

false

The more sudden the activation of a myotatic reflex, the less significant the reflexive contraction.

false

The term "extensibility" refers to the ability of a muscle to return to its original length following stretching.

false

Muscles are usually named due to all of the following except?

nerve

_____ occurs when an antagonistic muscle becomes stretched to the point at which it can no longer lengthen and allow movement.

passive insufficiency

The subconscious mechanism by which the body is able to regulate posture and movement is _____.

proprioception

Which of the following is not a shape by which muscles are categorized?

radial

Which of the following do not result in the contraction of the muscle fibers in a particular motor unit?

sub threshold stimulus

Which of the following is not a true statement regarding antagonist muscles?

these muscles work against agonist muscles by contracting and preventing movement

The pennate type of muscle fiber arrangement may be classified by the following terms except?

tripennate

16. Isotonic contractions are described as either concentric or eccentric on basis of whether shortening or lengthening of the muscle occurs.

true

All muscle contractions are classified as either isometric or isotonic.

true

Generally, as a muscle gets longer, its ability to exert force increases.

true

Skeletal muscles are responsible for movement of the body as a whole and movement within each of the joints of the body.

true

The conscious awareness of the position and movement of the body in space is kinesthesis.

true

The term "action" refers to a specific movement of a joint that occurs as a result from a concentric muscle contraction.

true

The term "innervation" is used to describe a segment of nervous system and is defined as being responsible for providing a stimulus to muscle fibers within a specific muscle or portion of a muscle.

true

The term "intrinsic" usually pertains to muscles within or belonging solely to the body part upon which they act.

true

The term "isokinetics" describes a type of dynamic exercise that uses concentric and/or eccentric muscle contractions.

true

Two different muscles may contract simultaneously at a joint and cause a motion that neither would cause if contracting alone.

true

When antagonist muscles contract concentrically they perform the opposite joint motion of the agonist muscle.

true

joint movement may occur without any muscle contraction.

true

there are two major types of fiber arrangements which are parallel and pennate

true