click below
click below
Normal Size Small Size show me how
Medical Info.
Basic Trivia
Question | Answer |
---|---|
Each hand contains _ bones. | 27 |
Bones are made up of two main types of tissue: _ bone and _ bone. | spongy/ compact |
_ bone is dense and heavy, and gives a bone its strength. | Compact |
Compact bone is constructed from microscopic cylinders called _. | osteons |
At the center of each _ is a cavity containing tiny _ _ that supply bone cells with nutrients. | osteon/ blood vessels |
_ bone is filled with spaces to make bones lighter. | Spongy |
A lattice of struts, or _, run through spongy bone. | trabeculae |
Embedded throughout them are _ that lay down minerals to strengthen the bone. | cells |
In some bones, the spaces between the struts are filled with _ _, a type of tissue that makes blood cells. | bone marrow |
An osteoclast's job is to _ bone to release minerals into the blood or to turn _ into bone. | dissolve/ minerals |
The control center of a cell is its nucleus, with _ pairs of chromosomes- one of each pair from your mother and one from your father. | 23 |
A _ is made up of tightly coiled DNA. | chromosome |
Layer of skin and outer tissue of head including fat and muscle. | scalp |
8 curved bones fixed together enclose the brain. | cranium |
Fixed joint between bones of the skull. | suture |
3 layered protective membranes surround the brain. | meninges |
Mostly nerve fibers (axons) that carry information. | white matter |
Very closely packed nerve cells. | gray matter |
Folds and creases allow for maximum surface area. | gyri and sulci |
Large vein that runs over the top of the brain. | cavernus sinus |
Space within the brain filled with protective fluid. | ventricle |
Carries visual information from the eye to the brain. | optic nerve |
Wall of the orbital cavity, made of bone to protect the eye. | bony orbit |
Sits within bony orbit and is attached to the optic nerve. | eyeball |
The eight different bones of the cranium don't join together until about _ months of age. | 18 |
Before fusing, the bones are separated by membrane-filled gaps called _. | fontanelles |
These enable the skull to be squeezed during _, and allow for rapid _ _. | birth/ brain growth |
The brain's basic component is the _, a spindly, wirelike cell that works by sending electrical signals to other _. | neuron/ neurons |
There are more than _ billion neurons in the brain, and each has up to _ connections. | 100/ 100,000 |
Every second, trillions of electrical signals dart among our neurons at speeds of up to _ mph. | 250 |
The scalp is dotted with about _ tiny openings called _; a hair grows from each one. | 10,000/ follicles |
The main part of the brain, the _, is divided into 2 hemispheres. | cerebrum |
The _ side is usually the best at math and language. | left |
The _ side is better at visual skills. | right |
The cerebrum is where thought process, _, and concious movement are processed. | memory |
The _ _ is the bridge between the two sides of the brain. | corpus callosum |
The _ coordinates movement and balance. | cerebellum |
The _ _ regulates vital functions such as breathing. | brain stem |
The _ _ connects the brain with the rest of the body. | spinal cord |
The _ _ supplies blood to the head. | carotid artery |
Each neuron has one _ that carries away outgoing signals, and up to 100,000 branching _ that carry incoming signals to the cell body. | axon/ dendrites |
The brain takes a _ of the blood pumped by the heart. | fifth |