Anatomy Exam 2
Origin and insertion:
humorous or radius/ulna; carpals
What neuron has its cell body in the thalamus?
3rd order neuron
What causes abduction of the thigh at the hip?
the gluteal muscle
The muscle that abducts the wrist has an origin on the ____ and an insertion on the ____
radius; carpals and metacarpals
Which muscle inserts on the tibia?
semitendinosus
Which of the following causes extension of the knee?
quadriceps femoris
The orbicularis iris muscle is an example of a:
circular muscle
The spinal cord tapers at a conical tip called the:
conus medullaris
Which ABDUCTS the arm?
deltoid
The _____ is the outermost menix, and forms supportive and protective partitions between some portions of the brain
dura mater
What muscles cause extension of the wrists?
extensor carpi ulnas and extensor carpi radialis
Which at the following is used to straighten out toes?
extensor digitorium longus/extensor hallucis longus
A muscle that flexes the knee would originate on the:
femur or coxal bone
Bony origin; Bony insertion (knee):
femur; tibia/fibula
A muscle in the posterior compartment of the whole leg could possibly:
flex the toe
What occurs when bowing?
flexion
Wrist movement?
flexion and extension
Which of the following would not cause lateral rotation of the thigh at the hip?
gluteus medius
socker kick - movement occurs:
hip extension/knee extension
The median nerve rises from which cord?
lateral and medial cords
Post synaptic membrane belongs to which structure?
neuron, muscle, gland
2 main cell types in nervous system:
neurons and neuroglia
What muscle raises eyebrows?
occipito frontalis
Which muscle flexes the torso?
posts major and rectus abdominis
Which of the following RETRACTS the scapula?
rhomboid minor
What cell is found in the dorsal ganglia?
satellite cells / pseudounipolar type cells too
Which muscle extends the torso?
spinalis
What muscles causes flexion of the neck?
sternocleidomastoid
What muscle causes medial rotation of the shoulder?
subcapularis and pectoralis major
Which of the following branched patterns of nerves is part of the brachial plexus?
superior trunk, lateral cord, musculocutaneous nerve *any correct branch pattern not just this one
During the cross-bridge cycle, after the calcium binds to troponin, what happens next?
tropomyosin rolls away from actin, exposing the active binding sites
Which of the following muscles causes abduction of the arm at the shoulder?
Deltoid
The rectus femoris:
FLEXES the hip and EXTENDS the knee
What muscle causes adduction at the hip?
Gracilis
Which of the following muscles causes flexion of the arm at the shoulder?
biceps brachii
The cell body of a second order neuron will be located in the:
spinal cord
Which of the following muscles is not involved with moving the jaw?
sternocleidomastoid
Which muscle does not cause movement at neck?
sternohyoid
A good example of a third class lever is found?
the arm with the action of the biceps brachia
Which of the following causes flexion of the elbow?
brachioradialis, biceps branch, brachialis
What muscles causes depression?
Digastric
The cervical plexus is comprised of how many nerves?
5 nerves
What neuron has its cell body in the spinal cord?
2nd order neuron
What movement is occur at the jaw when chewing gum?
Depression/Levation
The ____ helps you frown, while the ____ contracts the opening surrounding the eye.
depressor anguli oris; orbicularis oculi
The nodding of the head is....
flexion/extension
ADDUCTION at the wrist involves contraction of the:
flexor carpi ulnaris and extensor carpi ulnaris
When is it that an impulse does not have to reach the brain?
in a reflex arc
What muscle causes the eye to point inward toward the nose?
medial rectus
