Anatomy Unit 2 Exam

Structures of the sternum

**suprasternal notch not jugular notch

Place the events involved in muscle contraction in the correct order.

-A nerve impulse causes ACh release at a neuromuscular junction. -ACh binds receptors on the motor end plate, initiating a muscle impulse. -Calcium ions bind to troponin, causing tropomyosin to move and expose active sites. -Myosin heads attach to actin and form crossbridges. -A cyclic "attach, pivot, detach, return" event occurs. -Calcium ions are moved back into the sarcoplasmic reticulum by ATP-driven pumps. -Myofilaments passively return to their original state.

Check all that are a function of skeletal muscle tissue. -Regulation of blood pH -Body movement -Maintenance of posture -Heat production -Regulating elimination of materials -Protection and support

-Body movement -Maintenance of posture -Heat production -Regulating elimination of materials -Protection and support

The pad of fibrocartilage between the left and right pubic bones is which type of joint? Check all that apply. -Fibrous joint -Syndesmosis -Cartilaginous joint -Symphysis

-Cartilaginous joint -Symphysis

Place the following excitation-contraction coupling events in the order that they occur.

-End-plate potential reaches threshold -Action potential sent throughout the sarcolemma -Voltage-sensitive DPH receptors are activated -Conformational change opens RyR1 channels -Release of calcium into sarcoplasm

Which of the following are locations where you would find a synchondrosis? Check all that are correct. -Epiphyseal plates in children -Between the bones of the skull in adults -The first sternocostal joint (between the first rib and the sternum) -Between each rib and its costal cartilage

-Epiphyseal plates in children -The first sternocostal joint (between the first rib and the sternum) -Between each rib and its costal cartilage

Check all that are proteins of thin filaments. -Myosin -Actin -Troponin -Titin -Tropomyosin

-actin -troponin -tropomyosin

Which of the following are facial bones: -Maxilla -Nasal -Occipital -Zygomatic -Lacrimal -Sphenoid -Vomer

-maxilla -nasal -zygomatic -lacrimal -vomer

Which of the following is not a function of the vertebral column? -Provide support for the muscles of the arm -Help transfer axial skeleton weight to the lower limbs -Provide vertical support for the body -Support the weight of the head

-provide support for the muscles of the arm

Which of these are auditory ossicles: -stapes -hyoid -malleus -incus

-stapes -malleus -incus

Atlas

C1

Extensibility

ability to extend in length

Conductivity

ability to pass an electrical change along a cell's plasma membrane

Excitability

ability to respond to stimuli

Elasticity

ability to return to original length

Contraction

active generation of force

Coccyx

also called tailbone

Parietal suture

also sagittal suture

The multiaxial joint in which the spherical end of one bone fits into the cuplike socket of the other bone is called a ___________ joint. -plane -pivot -ball-and-socket -condylar

ball-and-socket

Sagittal suture

between parietal bones

Lambdoid suture

between parietal bones and occipital bone

Syndesmosis

between radius and ulna

Suture

between skull bones

Gomphosis

between tooth and jaw

Articular cartilage

covers articulating surfaces

Thoracic vertebrae

each one connects to a rib pair

A bodybuilder exhibits an increase in muscle size, called hyperplasia.

false

Articulations involve only the point of contact between bones and other bones.

false

An anthropologist examines an ancient human pelvis in an attempt to learn more about its lifestyle. She notices that the pelvis has a wide greater sciatic notch, a short, wide sacrum, and a subpubic angle of 110 degrees. Is she inspecting a male or female pelvis?

female

Sacrum

five fused vertebrae

The "soft spots" on an infant's head are caused by what?

fontanelles

Diarthrosis

freely mobile joint

Which of the following joints is the least stable? -Skull suture -Glenohumeral (shoulder) joint -Radioulnar joint -Costochondral joint

glenohumeral (shoulder) joint

In the gluteus maximus, each motor unit controls a(n) _____________ amount of muscle fibers than a motor unit in the eye muscles. -lesser -greater -equal

greater

Synovial joint

has a fluid filled joint cavity

Synarthrosis

immobile joint

Symphyses can be found in the -intervertebral joints. -glenohumeral joints. -knee joints. -joints between the sternum and the ribs.

intervertebral joints

Fibrous joint

joined by dense regular connective tissues

Cartilaginous joint

joined together by cartilage

Synovial membrane

lines the joint cavity

Which of the following is NOT a cranial bone? -ethmoid -frontal -occipital -mandible -parietal

mandible

If you palpate the medial side of your ankle, what prominent process of the tibia are you feeling? -Tibial tuberosity -Medial malleolus -Fibular notch -Medial condyle

medial malleolus

Adductor magnus

muscle action

Triceps brachii

number of muscle heads

Which of the following features is the most proximal feature of the ulna? -Styloid process -Olecranon -Radial tuberosity -Tuberosity of ulna

olecranon

External oblique

orientation of muscle fibers

Cervical vertebrae

seven vertebrae

Amphiarthrosis

slightly mobile joint

Joint cavity

space between bones

Tibialis anterior

specific body region

Cardiac muscle

striated, autorhythmic

Skeletal muscle

striated, multiple nuclei

If you palpate the bony projection on the lateral side of your wrist, just proximal to the thumb, what part of the radius are you feeling?

styloid process

The type of cartilaginous joint that is joined by hyaline cartilage is a ___________, while the type of cartilaginous joint that has a pad of fibrocartilage between the bones is a ___________. -synovial joint; syndesmosis -costochondral joint; synchondrosis -gomphosis; fibrous joint -synchondrosis; symphysis

synchondrosis; symphysis

Which of the following fibrous joints allows for slight movement with articulating bones that are joined by long strands of dense regular connective tissue? -Syndesmosis -Suture -Gomphosis

syndesmosis

Coronal suture

the suture between the parietal and frontal bones of the skull

The component of a muscle fiber that quickly transports a muscle impulse from the sarcolemma throughout the entire muscle fiber is called the -sarcoplasmic reticulum. -transverse tubule (T-tubule). -terminal cisternae. -titin

transverse tubule (T-tubule)

Primary ossification centers begin to form in limb bones during week 8 of development.

true

Synovial joints have these features: an articular capsule, a joint cavity containing synovial fluid, articular cartilage, ligaments, blood vessels, and nerves.

true

Smooth muscle

unstriated, single nucleus