A & P Ch 6 Muscles Test

What is the main function of the quadriceps group?

• arm flexion

• thigh abduction

• foot inversion

• knee extension

• hand supination

Which of the following muscles closes the jaw?

• frontalis

• buccinator

• sternocleidomastoid

• both masseter and temporalis

• zygomaticus

Which of the following is an example of an isometric contraction?

• shaking the head as to say "no"

• pushing against an immovable wall

• bending the elbow

• rotating the arm

• nodding the head to say "yes"

Endomysium covers

• fascicles of muscle cells

• an entire muscle

• an individual muscle cell

• myofibrils

• smooth muscle only

Striated involuntary muscle tissue is classified as _________ muscle.

• skeletal

• cardiac

• smooth

• either smooth or skeletal

Contractions in which muscles shorten and produce movement are known as ________.

• isotonic contractions

• twitches

• isometric contractions

• resistance exercises

Muscles that perform opposite actions to one another are termed ________.

• synergists

• prime movers

• antagonists

• fixators

The muscle that closes each eye is the _______.

• orbicularis oris

• frontalis

• orbicularis oculi

• zygomaticus

The hamstring group is the prime mover of thigh ______ and knee ______.

• extension; flexion

• dorsiflexion; plantarflexion

• abduction; adduction

• rotation; circumduction

Which type of muscle tissue contracts most quickly upon stimulation?

• skeletal

• visceral

• cardiac

• smooth

• tendons