Anatomy Quiz 1

The spinal cord has:

A core of gray matter surrounded by white matter

Which of the following combinations indicates the correct distribution of spinal nerve pairs?

7 cervical - 12 thoracic - 5 lumbar - 6 sacral - 1 coccygeal

The intermediate radioulnar joint exists between the radius and the ulna. The two bones are joined together by a high-collagen sheet of dense connective tissue. This joint allows slight movements and flexibility between the two bones. What specific type of joint is this?

A fibrous syndesmotic joint

Which of the following correctly pairs the term with its definition?

Abduction - lifting the arm out to the side so it is parallel to the ground

Which of the following is found in the posterior group of forearm muscles?

Abductor pollicis longus

Raising your arm to shoulder level is accomplished almost entirely by the

Deltoid

The branch of a spinal nerve that innervates deep muscles on the dorsal thorax is the

Dorsal ramus

The sensory root of a spinal nerve is also referred to as

Dorsal root

The thickest of the meninges is the

Dura mater

The ventral root of a spinal nerve contains

Only motor fibers

A muscle end attached to a less movable or relatively fixed part is called the

Origin

Which of the following muscles of the chest has its insertion on the humerus?

Pectoralis major

The central nervous system (CNS) consists of

The brain and spinal cord

Classifying joints as synarthrotic, amphiarthrotic, or diarthrotic represents

The degree of movement possible at the joint

Which of the following veins is a superficial vein? Ulnar, basilic, subclavian, radial, or brachial?

basilic

Supination of the forearm and hand is accomplished by the

biceps brachii and supinator.

Blood flow into the deep and superficial palmar arches originates from the ____ and _____

radial; ulnar

Types of fibrous joints

syndesmosis, suture, and gomphosis joints.

The rotator cuff muscles

hold the head of the humerus in the glenoid fossa of the scapula.

The conus medullaris

is a tapered, cone like region immediately inferior to the lumbar enlargement

The nervous system

Controls the movement of muscles

A tendon is ____ whereas an aponeurosis is _______.

Cordlike and connects muscles to bones; a broad sheet of dense CT that connects muscles to muscles

A muscle the extends both the wrist and the index finger is the...

Extensor indicis

Organize the following parts of a muscle from smallest to largest: muscle fiber, fascicle, myofibril, filament, muscle.

Filament, myofibril, muscle fiber, fascicle, muscle

What structure anchors the thecal sac and conus medullaris to the coccyx?

Filum terminale

The act of closing the fingers to make a fist is an example of what type of joint movement (at the interphalangeal joints)?

Flexion

The teres major and teres minor are not involved in

Flexion and abduction of forearm

Movements permitted by the elbow joint between the humerus and ulnar are:

Flexion and extension

A tooth root attached to a jawbone by a periodontal ligament is a____

Gomphosis

Cartilaginous joints are connected by:

Hyaline cartilage or fibrocartilage

Cartilaginous joints are connected by?

Hyaline cartilage or fibrocartilage

The muscle that opposes a particular action is called the____

Antagonist

When someone taps you on your shoulder, they stimulate the _____ nerve:

Axillary

Which of the following veins is a superficial vein:

Basilic vein

Suppose all synarthrotic joints were fused in an individual. Which of the following would be true of this individual?

Braces would not work to straighten the person's teeth because the teeth would not move.

Spinal nerves C5-T1 make up the _____ plexus

Brachial

Tracing the blood from the heart to the right hand, blood leaves the heart, passes through the ascending aorta, aortic arch, right subclavian artery, axillary and brachial arteries, either the radial or ulnar arteries and palmar arches to arrive at the hand. Which artery is missing in this sequence?

Brachiocephalic

Fluid-filled sacs containing synovial fluid are called

Bursae

What is found in the dorsal root ganglion?

Cell bodies of pseudo-unipolar sensory neurons

A vein responsible for draining blood from the upper limb is the

Cephalic

The superficial vessels typically seen in the hand and forearm are tributaries of the ________ and ________ veins.

Cephalic; basilic

Suppose the pubic symphysis did not exist in the pelvic girdle and the two pubic bones were fused in the middle. Which of the following best describes the way the region would be affected if this joint was removed?

Childbirth would have a high mortality risk because the pelvic girdle would be rigid and unmoving.

The anconeus works with the triceps brachii

Extend the forearm

Which of the following muscles is part of the rotator cuff?

Infraspinatus

A joint capsule is reinforced by

Ligaments binding articular ends of bones together.

The spinal cord

Links the peripheral nervous system to the brain

Which of the following veins is NOT involved in draining blood from the brachium?

Median Cubital Vein

Which vessel is often used to draw blood from the patient?

Median cubital vein

An injury to the wrist that results in edema in the carpal tunnel would compress the

Median nerve

Most of the neurons in the brain and spinal cord are:

Multipolar

The brachial plexus supplies nerves that function to contract which of the following?

Muscles of the arm and forearm

Using the biceps brachii to flex the forearm requires innervation of the ___ nerve.

Musculocutaneous

Which muscle retracts, rotates, and fixes the scapula?

Rhomboideus major

Dendrites on unipolar neurons are parts of:

Sensory neurons

The coracohumeral ligament is associated with the

Shoulder joint

A muscle that assists the agonist is a(n)

Synergist

The somatic nervous system consists of nerve fibers that connect the CNS to the ___, whereas the autonomic nervous system consists of fibers that connect the ____.

Skin and skeletal muscles; CNS to the visceral organs

Activities such as distance swimming and distance running will most likely stimulate development of:

Slow fatigue-resistant fibers

During a spinal tap, CSF is obtained from which of the following locations?

Subarachnoid space

The three major arteries of the upper limb that form a continuum are the

Subclavian, axillary, and brachial arteries

Which muscle fixes the clavicle or elevates the first rib?

Subclavius

Of the following muscles of the forearm, which one rotates the forearm to turn the palm upwards?

Supinator

Which of the following is not a synovial joint?

Symphysis

The extensor pollicis brevis moves the

Thumb

As a person is vigorously rowing a boat, they suddenly experience extreme pain in their upper arm and no longer can extend at the elbow joint. Which of the following is probably the injured muscle?

Triceps brachii

If a man exercises by doing push-ups every day, he would strengthen or enlarge which of the following muscles?

Triceps brachii

Which of the following muscles extends the forearm and has its insertion on the ulna?

Triceps brachii

When a person hits their funny bone, they cause temporary damage to the _____ nerve.

Ulnar

In a subdural hematoma resulting from a blow to the head, blood accumulates between the

dura mater and arachnoid mater

Three general functions of the nervous system are

integrative, motor, and sensory.

The arm is attached to the thorax by the

latissimus dorsi and pectoralis major.

If the synovial membrane could not secrete synovial fluid,

the cartilage contained within the capsule would not receive nutrients from synovial membrane blood vessels.