Chapter 7.5 anatomy module

which digit is the radius closest to? The radius runs parallel to the ulna on the same side as the thumb (digit 1).

1

how many phalanges are located in the hand? Three phalanges make up each finger (4 x 3) except the thumb which contains 2 phalanges.

14

how many carpals make up the wrist? The wrist is comprised of 8 carpals.

8

what part of this bone articulates wih the ulna? The feature at D forms the primary contact with the ulna in the elbow joint. Processes from the ulna enter the olecranon and coronoid fossae during elbow flexion and extension.

D

the "true wrist" or carpus consists of ________.

a group of eight short bones united by ligaments

which region of the skeleton contains the humerus? The appendicular skeleton consists of all of the bones that make up the arm, hand, leg, and foot.

appendicular

identify the bones that make up the wrist. Eight carpals make up the wrist.

carpals

which of the following is a bone marking of the humerus? The deltoid tuberosity is a marking of the humerus. It is a roughened site where attachment to the deltoid muscle of the shoulder occurs.

deltoid tuberosity

where in the skeleton is the ulna located in reference to the humans? The ulna is a bone in the forearm which is distal to the humerus in the upper arm. The humerus makes up the upper arm.

distal

since a Colles' fracture can occur when a falling person attempts to break the fall outstretched hands, an X ray will typically show that, at the site of the fracture, the hand is displaced in a ____________ direction. Dorsal refers to an object facing backward or directed toward the back.

dorsal

the most common site of fracture in the humerus is the anatomical neck.

false

identify the true statement about the head of the ulna. The head of a bone is typically found at the proximal end. The head of the ulna is at the distal end of the bone near the wrist.

found at the distal end of the bone.

which of the following landmarks found on the proximal end of the humerus? The greater tubercle is adjacent to the head of the humerus. It is the insertion site for some of the rotator cuff muscles.

greater tubercle

identify the region of the radius that articulates with the ulna. The round, flat disc shaped head of the radius pivots around the ulna at the radial notch of the ulna, allowing supination and pronation of the forearm.

head

what part of the humerus articulates with the scapula to form the shoulder joint? The head of the humerus articulates with the glenoid cavity of the scapulae to form the shoulder joint.

head

this bone articulates with the glenoid fossa.

hermus

when you hit your elbow and say that you hit your "funny bone," you have actually hit a nerve that runs across the bone surface. Over which bone can this nerve be found? The ulnar nerve, which runs behind the medial epicondyle of the humerus at its distal end (at the elbow), is responsible for the painful, tingling sensation you experience when you hit your "funny bone" (associate humerus with humorous).

humerus

where is the radius located in reference to the ulna? The radius runs parallel to the ulna on the lateral surface of the forearm.

lateral

which of the following landmarks is found on the distal end of the humerus? The lateral epicondyle of the humerus is on the lateral distal surface of the bone. It serves as a site of muscle attachment.

lateral epicondyle

what type of bones are the phalanges? Although the phalanges are small in size, their elongated shape qualifies them as long bones.

long

which of the following features of the humerus is NOT designated by a letter label? The medial epicondyle is located on the distal humerus on the side toward the body (in anatomical position).

medial epicondyle

identify the bones that make up the palm of the hand. The metacarpals are located between the carpals (the wrist) and the phalanges (the fingers).

metacarpals

idnetify the depression found on the surface of the humerus. The olecranon fossa is the large depression at the distal end of the humerus. The olecranon fossa of the humerus together with the olecranon process of the ulna permit full extension of the forearm.

olecranon fossa

idnetify the region of the ulna that articulates wih the humerus when the forearm is in full extension. When the forearm is in full extension the olecranon process of the ulna fits snuggly into the olecranon fossa of the humerus.

olecranon process

the finers have three of these bones and the thumb has only two.

phalanges

what type of joint is formed between the radius and ulna? The head of the radius pivots around the ulna at the radial notch, allowing supination and pronation of the forearm.

pivot

forearm bone that articulates with most of the carpals.

radius

the feature at letter C articulates with which bone? The head of the humerus articulates with the scapula at the glenoid cavity.

scapula

people who work at computer keyboards all day repeatedly flex their wrists and fingers and therefore become susceptible to carpal tunnel syndrome, a condition in which inflammation of tissue causes tingling and pain. Which one of the following treatments will be least likely to reduce the pain? This action is exactly the same as what causes the initial condition.

squeezing tennis balls in both hands in order to strengthen the wrist and finger muscles

identify the projection found on distal end of the ulna. The styloid process of the ulna makes up the superficial bump seen on lateral surface of the wrist.

styloid process

which of the following regions of the radius help from the wrist joint? The styloid process of the radius is a pointed elongation of the epiphysis at the distal end of the bone. It articulates with the carpals at the wrist.

styloid process

identify the type of movement enabled by the articulation between the radius at the elbow. The head of the radius pivots around the ulna permitting supination and pronation of the forearm.

supination

the antebrachium is composed of which of the following two bones?

the radius and the ulna

which of the following statements is true? The deltoid tuberosity is a marking of the humerus. It is a roughened site where attachment to the deltoid muscle of the shoulder occurs.

the radius is the lateral bone in the forearm.

which forearm bone(s) contribute(s) most heavily to the elbow joint? The olecranon articulates and moves across the humerus to form the elbow joint.

the ulna

which digit is composed of only two phalanges? The thumb contains two phalanges, a proximal and distal phalanx.

thumb

identify the region of the humerus that articulates with the ulna. The trochlear notch of the ulna swings around the trochlea of the humerus forming the hinge joint of the elbow.

trochlea

idnetify the primary region of the ulna that forms the hinge joint with the humerus. The trochlear notch of the ulna swings around the trochlea of the humerus, permitting flexion and extension at the elbow.

trochlear notch

in the anatomical position, the lateral forearm bone is the radius.

true