Anatomy Exam 2

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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


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