Lab Manual Exercise 11 Post-lab Quiz Question 5

What is unique about the brachioradialis muscle of the anterior forearm?

The brachioradialis acts as a flexor, while the majority of the superficial layer muscles act as extensors.

Based on the name gluteus maximus, which of the following statements about the muscle is true?

This is the largest muscle of the gluteal region. Submit

Lateral rotation of the eyeball is facilitated by the ________.

superior rectus, medial rectus, and inferior rectus muscles

Which muscle acts as an antagonist for plantar flexion?

tibialis anterior

Inability to control (stop/start) the flow of urine may suggest ________.

weak intercostal muscles

Identify the muscle or muscles that facilitate the action described in the following situation: During a trip to New York City, you whistle loudly to hail a taxicab.

buccinator, orbicularis oris

The latissimus dorsi ________.

extends, flexes, abducts, and medially and laterally rotates the shoulder

The primary action of the triceps brachii is ________.

extension of the forearm

During a focused breathing exercise, you feel your ribs elevate as you inhale. Which muscle or muscle group is responsible for this action?

external intercostal muscles

Which of the following muscles is NOT involved in mastication?

frontalis

Identify the prime mover that facilitates the action of your nostrils in the following situation: After a particularly vigorous exercise class, your strong breathing is accompanied by flaring of the nostrils.

nasalis

Identify the muscle or muscles responsible for the voluntary tongue movement necessary to facilitate swallowing.

palatoglossus, styloglossus, genioglossus, and hyoglossus

Identify the prime mover that facilitates the action described in the following situation: After receiving positive feedback from your anatomy professor, the corners of your mouth elevate as you smile with delight.

zygomaticus major

The quadriceps femoris muscles are located in the posterior thigh.

False Submit

Identify the prime mover that facilitates the action described in the following situation: When asked to respond to a question in class, you raise your eyebrows and your forehead wrinkles.

frontalis

Upon arriving in your anatomy lab, you drop your pencil. Identify the muscle that allows for flexion of the vertebral column, allowing you to bend at the waist to retrieve the pencil.

rectus abdominis