Med Term - Ch 2 Flashcards
What does the acronym ROS stand for?
ROS = Review Of Systems (used in diagnosis to determine what me be causing symptoms)
What does the acronym CBC stand for?
CBC = Complete Blood Count
Levels of building blocks for organisms
Chemicals - Cells - Tissues - Organs - Systems - Organism
What is the basic unit of living organisms?
The Cell
Define Metabolism
The sum of all the body’s physical and chemical activities.
What are the main categories of organic compounds contained in cells?
Proteins, which include the enzymes, some hormones, and structural materials.
Carbohydrates, which include sugars and starches. The main carbohydrate is the sugar glucose, which circulates in the blood to provide energy for the cells.
Lipids, which include fats. Some hormones are derived from lipids, and adipose (fat) tissue is designed to store lipids.
How may chromosomes are in a human cell?
There are 46 chromosomes in each human cell, except the sex cells (egg and sperm).
What is Mitosis?
The process of cell division.
A body cell divides by the process of mitosis, the chromosomes are doubled and then equally distributed to the two daughter cells.
What happens during Mitosis?
The chromosomes are doubled and then equally distributed to the two daughter cells.
When a cell is not dividing, what phase is it in?
Interphase
What happens to cells in cancer?
In cancer, cells multiply without control causing cellular overgrowth and tumors.
What is meiosis?
Reproductive cells (eggs and sperm) divide by the process of meiosis, that halves the chromosomes in preparation for fertilization.
Cells are organized into four basic types of tissues. What are they?
Epithelial (ep-ih-THE-le-al) tissue, Connective tissue, Muscle tissue (root: my/o), & Nervous tissue (root: neur/o)
What is the function of Epithelial tissue?
It covers and protects body structures and lines organs, vessels, and cavities.
Describe simple epithelium
Tissue composed of cells in a single layer, functions to absorb substances from one system to another, as in the respiratory and digestive tracts.
Describe stratified epithelium
Tissue with cells in multiple layers, protects deeper tissues, as in the mouth and vagina. Most of the active cells in glands are epithelial cells.
What is the function of connective tissue?
Connective tissue supports and binds body structures.
Describe connective tissue
It contains fibers and other nonliving material between the cells. Included in this category are blood, adipose (fat) tissue, cartilage, and bone.
What is the function of muscle tissue?
It contracts to provide movement.
What are the three types of muscle tissues?
Skeletal, Cardiac, and Smooth or Visceral
Describe skeletal muscle tissue
Skeletal muscle moves the skeleton. It has visible cross-bands, or striations, that are involved in contraction. Because it is under conscious control, it is also called voluntary muscle.
Describe cardiac muscle tissue
Cardiac muscle forms the heart. It functions without conscious control and is described as involuntary.
Describe Smooth or visceral muscle
Smooth or visceral muscle forms the walls of the abdominal organs; it is also involuntary. Many organs described in later chapters on the systems have walls made of smooth muscle. The walls of ducts and blood vessels also are composed mainly of smooth muscle.
Describe nervous tissue?
Nervous tissue (root: neur/o) makes up the brain, spinal cord, and nerves. It coordinates and controls body responses by the transmission of electrical impulses. The basic cell in nervous tissue is the neuron, or nerve cell.