Biology 1006 Self Test 2

All of the following statements are true of the heart pacemaker except

a. it is located in the right atrium; b. the technical name for it is the A-V node; c. it is responsible for sending the impulse out for atrial contraction; d. the electrical impulse spreads out concentrically over the atria

ball-and-socket joint

attachment of leg to pelvic girdle

pivot joint

attachment of vertebrae to skull

nephrons

basic urine-producing structure in kidney

patella

kneecap

insertion

muscle attachment to a moveable part of body

villi

projections inside small intestine

tubules

reabsorption by the kidney of needed materials

pancreas

secretes digestive enzymes

gall bladder

stores bile

alveoli

tiny sacs within the lungs

An example of an extensor is

triceps