A muscle with fascicles that insert into the tendon from both sides is categorized as
answer
bipennate
question
An example of a muscle with this type of fascicle arrangement is the orbicularis oris.
answer
circular
question
The fascicles of the biceps brachii muscle have this type of arrangement.
answer
fusiform
question
The biceps brachii operates in a ________-class lever system.
answer
third
question
A lever system operating at a mechanical advantage can move a large load a short distance with a small amount of effort.
answer
true
question
A synergist muscle can do all of the following except
answer
reverse a particular movement caused by the prime mover
question
The prime mover is also known as the antagonist.
answer
false
question
Which of the following statements is correct regarding muscle position and its related action?
answer
A muscle that crosses on the posterior side of the knee joint produces flexion.
question
Which of the following statements is correct regarding muscle position and its related action?
answer
The teres major crosses on the medial side of the shoulder joint to produce adduction.
question
The extensor muscles of the upper limb lie almost exclusively in the ________ region of that limb.
answer
posterior
question
Which set correctly matches the function of the designated muscle compartment?
answer
lateral leg- foot eversion
question
Which set does not correctly match the function and innervation of the designated muscle compartment?
answer
lateral leg- foot eversion- deep fibular nerve
question
A prime mover for extending the arm at the shoulder is the
answer
latissimus dorsi
question
A prime mover for lateral rotation at the shoulder is the
answer
teres minor
question
A prime mover for leg extension at the knee is the
answer
rectus femoris
question
In anatomical position, the pronator teres, the brachioradialis, and the extensor carpi radialis all lie on the anterior surface of the forearm.
answer
false
question
The cross bridge cycle is a series of molecular events that occur after excitation of the sarcolemma. What is a cross bridge?
answer
a myosin head bound to actin
question
What structure is the functional unit of contraction in a skeletal muscle fiber?
answer
the sacromere
question
Calcium ions couple excitation of a skeletal muscle fiber to contraction of the fiber. Where are calcium ions stored within the fiber?
answer
Calcium ions are stored in the sarcoplasmic reticulum.
question
After a power stroke, the myosin head must detach from actin before another power stroke can occur. What causes cross bridge detachment?
answer
ATP binds to the myosin head.
question
How does the myosin head obtain the energy required for activation?
answer
The energy comes from the hydrolysis of ATP.
question
What specific event triggers the uncovering of the myosin binding site on actin?
answer
Calcium ions bind to troponin and change its shape.
question
When does cross bridge cycling end?
answer
Cross bridge cycling ends when sufficient calcium has been actively transported back into the sarcoplasmic reticulum to allow calcium to unbind from troponin.
question
The two heads of the biceps brachii combine to insert on the __________.
answer
radial tuberosity
question
The latissimus dorsi inserts __________.
answer
on the intertubercular groove of the humerus
question
One of the actions of the latissimus dorsi muscle is to __________
answer
adduct the arm
question
Which compartment of the lower limb is NOT paired correctly with the general action of muscles of that compartment?
answer
posterior compartment of the thigh: Extends the leg and flexes the thigh
question
Damage to the __________ nerve(s) would result in paralysis of the latissimus dorsi muscle and thus the inability to __________.
answer
thoracodorsal; extend, adduct, and medially rotate the arm at the shoulder
question
Which muscle listed below is NOT matched correctly with its origin, insertion, action, or innervation?
answer
serratus anterior: innervated by the medial and lateral pectoral nerves
question
The origins of the lateral head of the gastrocnemius muscle are the __________.
answer
lateral condyle and posterior surface of the femur
question
The gastrocnemius muscle is innervated by the __________.
answer
tibial nerve
question
Part complete
The two heads of the gastrocnemius muscle converge to insert onto __________.
answer
clacaneus
question
The prime mover of hip extension is the __________.
answer
gluteus maximus
question
The tensor fascia latae is involved in hip __________.
answer
abduction
question
To allow for flexion, the __________ unlocks the knee joint.
answer
popliteus
question
Muscles that participate in plantar flexion include which of the following?
answer
gastrocnemius and soleus
question
What is the clinical significance of the triangle of auscultation?
answer
It is the space between the trapezius, latissimus dorsi, and medial border of the scapula where a clinician listens to a patient's heart and lung sounds.
question
The femoral triangle is formed by the inguinal ligament, sartorius, and gracilis muscles.
answer
false
question
The posterior triangle of the neck is bordered by the sternocleidomastoid, the trapezius, and the clavicle.
answer
true
question
Which forearm muscle is absent in about 30% of individuals?
answer
palmaris longus
question
Pain associated with the anatomical snuffbox may indicate
answer
fracture of the scaphoid bone
question
Which blood vessel lies deep to the sternocleidomastoid muscle?
answer
common carotid artery
question
The superior lateral border of the popliteal fossa is formed by the
answer
biceps femoris
question
Shin splints result from damage to which muscle or muscle group?
answer
tibialis anterior
question
the respiratory diaphragm is the prime mover in inspiration.
answer
true
question
The common origin for many of the extensor muscles of the forearm is the medial epicondyle of the humerus.
answer
false
question
The thenar eminence is located at the
answer
base of thumb
question
The deepest muscle of the anterior abdominal wall is the
answer
transversus abdominis
question
The major muscles used in throwing a punch are the
answer
serratus anterior and triceps brachii.
Haven't found what you need?
Search for quizzes and test answers now
Quizzes.studymoose.com uses cookies. By continuing you agree to our cookie policy
