joints and muscles
what does the term " antagonistic " muscle pair mean?
the action of one muscle produces an opposite effect on the other muscle and causes movement in the opposite direction. These muscles work against eachotter. Eg: biceps and tricepts
what is a capillary
a capillry is a small tube which takes blood through the tissues of cells. In the smallest capillaries, the red blood cells line up one after another to move through it
what was democritus' idea which led to the discovery of the atom
democritus came up w the theory that all matter must be made up of an indivisble particle which he later named " atom ", instead of everything being made up of air and water.
False
Name two examples of a hinge joint and ball and socket joint
Two examples of a hinge joint are the elbows and knees two examples of a ball and socket joint are the shoulders and the hip.
whats a blood transfusion?
When a blood donor provides blood to someone with an injury or disease in an emergency
what did rutherford use to fire at gold to find out about its atoms?
alpha particles
knees are a ball and socket joint
false
Whats the difference between a hinge joint and a ball and socket joint?
a hinge joint only provides movement forwards and backwards while a ball and socket joint provides movement backwards, forwards, side to side and in a circular motion.
what are red blood cells and what do they do?
red blood cells are shaped like a biconcave disc with a dip in the center , they transport oxygen from the lungs to all parts of the body.
how did marie-anne help antoine lavoisier?
marie-anne helped antoine by sketching out the new equipments for his investigation and translating the work of other scientists into french for him to read
the plum pudding theory was correct
false
when the bicep contracts what happens to the triceps
what is plasma?
Plasma is a straw colored watery liquid which transports RBC and WBC around the body. It also carries and transports nutrients, vitamins, glucose, fats and minerals which are imp in cell function.
what are cathode ray tubes
cathode ray tubes produce rays when connected into an electrical circuit
WBC defend ur body against pathogens
true
What are joints
the place where two boones meet is called a joint, in some joints such as the skull the bones are fused together and cant move.
what are white blood cells?
white blood cells have an irregular shape and they keep changing as the cytoplasm flows inside them, they defend the body from pathogens by gathering in large numbers and eating them.
atoms combine in ___________ when they form compounds
simple whole numbers
john dalton came up w atomic theory
true