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Biology 212 Final Exam, Oregon State University

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Interstitial fluid
The fluid filling the spaces between cells in most animals
Epithelial Tissue
Sheets of tightly packed cells that line organs and body cavities as well as external surfaces
Simple squamous Epithelium
is a single layer of flat cells. This type of epithelium is often permeable and occurs where small molecules pass quickly through membranes via filtration or diffusion.
Stratified Squamous Epithelium
consists of squamous (flattened) epithelial cells arranged in layers upon a basement membrane. This type of epithelium is well suited to areas in the body subject to constant abrasion, as it is the thickest and layers can be sequentially sloughed off and replaced
Loose Connective Tissue
It holds organs in place and attaches epithelial tissue to other underlying tissues. Contains collagen
Countercurrent Heat Exchange
The exchange of a substance or heat between two fluids flowing in opposite directions. For example, blood in a fish gill flows in the opposite direction of water passing over the gill, maximinzing diffusion of oxygen into and carbon dioxide out of the blood.
Whole Body BMR
Elephants require much more energy than a mouse when comparing the entire organism.
Mass-Specific BMR
Mice require much more energy than an elephant when comparing individual cells.
Substrate feeder
An animal that lives in or on its food source, eating its way through the food
Fluid feeder
An animal that lives by sucking nutrient rich fluids from another living organism.
Bulk feeder
An animal that eats relatively large pieces of food.
Villi
A finger like projection of the inner surface of the small intestine. Large number of these increase the surface area of an organ
Microvilli
One of many fine, finger like projections of the epithelial cells in the lumen of the small intestine that increase its surface area.
Exocrine glands
These typically include sweat glands, salivary glands, mammary glands, stomach, liver, pancreas
Bile
A mixture of substances that is produced in the liver and stored in the gallbladder, enables formation of fat droplets in water as an aid in the digestion and absorption of fats.
Bicarbonate
Secreted by the pancreas and goes into the small intestine to neutralize the acidic environment. Secretin is the hormone that stimulates this secretion.
Proteases
These are enzymes produced by the pancreas and secreted into the small intestine. CCK is the hormone that stimulates this.
Gastrin
This is produced by the stomach and is used to stimulate the secretion of gastric juices.
Cholecystokinin
This comes from the small intestine and goes to the gall bladder to stimulate the secretion of bile.
Secretin
Comes from the small intestine and stimulates the secretion of bicarbonate.
Ghrelin
Regulates appetite and is found in the stomach wall.
Leptin
Regulates appetite and is found in adipose tissue.
Peptide YY
Regulates appetite and is found in the small intestine.
Dentition
This is the study of how Herbivores, carnivores, and omnivores have different forms of teeth.
Single Circulation
A circulatory system consisting of a single pump and circuit, in which blood passes from the sites of gas exchange to the rest of the body before returning to the heart.
Double Circulation
A circulatory system consisting of separate pulmonary and systemic circuits, in which blood passes through the heart after completing each circuit.
Pulmonary Circuit
The branch of the circulatory system that supplies the lungs.
Systemic circuit
The branch of the circulatory system that supplies oxygenated blood to and carries deoxygenated blood away from organs and tissues throughout the body.
Atrioventricular valve
A heart valve located between each atrium and ventricle that prevents a backflow of blood when the ventricle contracts.
Semilunar valve
A valve located at each exit of the heart where the aorta leaves the left ventricle and the pulmonary artery leaves the right ventricle.
Acetylcholine
Works as an inhibitory neurotransmitter in the heart.
Systolic Pressure
Blood pressure in the arteries during contraction of the ventricles.
Diastolic Pressure
Blood pressure in the arteries when the ventricles are relaxed.
Lymph
A colorless fluid containing white blood cells, which bathes the tissues and drains through the lymphatic system into the bloodstream.
Leukocytes
A blood cell that functions in fighting infections, also called a white blood cell
Platelets
A pinched off cytoplasmic fragment of a specialized bone marrow cell. Circulate in blood and helps with blood clotting.
Erythropoietin
Stimulates the production of erythrocytes. It is secreted by the kidney when body tissues do not receive enough oxygen.
Low Density Lipoprotein
This transports cholesterol from the liver for incorporation into cell membranes.
Gill Arch
This is a bony or cartilaginous support to which gill filaments and gill rakers are attached.
Gill Filaments
Oxygen exchange occurs here in fish
Lamellae
A thin scale, plate, or layer of bone or tissue, as in the gills of fish
Insect Tracheal System
Rigid air tubes that branch throughout the body. The tracheoles reach every cell in the body. Circulatory system not involved.
Bronchi
One of a pair of breathing tubes that branch from the trachea to the lungs.
Bronchioles
A fine branch of the bronchi that transports air to alveoli.
Trachea
Mucus Escalator
Exhalation
Relaxation of the intercostals and diaphragm relaxes
Bird Lung
Entails one way ventilation. Requires an 2 complete sets of inhalation and exhalation for one molecule of air to go through the entire body. 2 air sacs are involved.
Dissociation Curve for Hb
Even a slight change in PO2 causes Hb to unload or load.
Carbonic Acid
Product of cellular respiration and leads to the Bohr Shift
Innate Immunity
A form of defense common to all animals that is active immediately upon exposure to pathogens and that is the same whether or not the pathogen has been encountered previously. lysozyme, phagocytic cells, lysosome
Natural Killer Cells
A type of white blood cell that can kill tumor cells and virus infected cells as part of innate immunity.
LPS
This is used to detect molecules in bacteria and eventually destroy them
Interferons
Secreted by T cells and helps activate macrophages.
Mast Cells
A vertebrate body cell that produces histamine and other molecules that trigger inflammation in response to infection in allergic reactions.
Adaptive Immunity
This is mediated by B lymphocytes (b cells) and T lymphocytes (T cells). Specificity, memory, and self-nonself recognition.
Lymphocyte
Two main classes are B cells and T cells.
B Cell
Utilized in the humoral immune response and are Plasma cells when they have been activated.
T Cell
These include both effector cells for the cell mediated immune response and helper cells required for both branches of adaptive immunity.
Antigen
A substance that elicits an immune response from B and/or T cells.
Antigen presenting cell
A cell that upon ingesting pathogens generates peptide fragments that are bound by class II MHC molecules and then displayed on the surface for T cells.
Opsonization
antigens are bound by antibody or complement molecules
Cytotoxic T Cell
When activated, kills infected cells as well as certain cancer cells. Voluntary sacrifice occurs.
Helper T Cell
Secretes cytokines that promote the response of B Cells and cytotoxic T cells to antigens. Activates the other two lymphocytes so that they can respond to the antigen.
Secondary Immune Response
This response is faster, greater, and longer than primary immune response.
Osmoconformer
An animal that is isosmotic with its environment. i.e. sharks and marine invertebrates
Osmoregulator
An animal that controls its internal osmolarity independent of the external environment. i.e. bony fish, and fish in freshwater
TMAO
sharks use this protein to regulate their osmotic balance.
Chloride Cells
Bony fish will secrete this across their gills to regulate their osmolarity.
Ammonia
no energy needed to make, low N amount, high toxicity, found in bony fish.
Uric Acid
high energy needed to make, high amount of N, low toxicity, found in birds and reptiles
Filtration
The extraction of water and small solutes, including metabolic wastes from the body fluid.
Malphigian Tubules
Organ in insects that empties into the digestive tract, removes nitrogenous wastes from the hemolymph. superb water retention
Proximal Tubule
In this section Sodium is actively pumped out and H2O and Cl follows.
Descending Loop of Henle
In this section H2O is reabsorbed through aquaporins.
Ascending Loop of Henle
In this section NaCl is reabsorbed through passive and active transport
RAAS
This is used when there is a decrease in blood pressure and volume.
ADH
This increases aquaporins in the collecting duct when the body is in need of retaining water.
Interneuron
Found in the CNS, used to analyze and interpret signals.
Reflex
When a signal only goes to the spinal cord and a motor response is performed.
Parasympathetic Division of ANS
Rest and digest. Heart is slowed with acetylcholine. Digestion occurs.
Enteric Division of ANS
Active in digestive tract. Secretion and peristalsis.
Neurotransmitter
Pass information from presynaptic cell to postsynaptic synapse. Binds to ligand gated ion channels.
Ungated Ion Channel
There are many K and few Na of these that allow passive membrane passage.
Gated Ion Channel
These open and close in response to a stimulus
Voltage Gated Ion Channel
Plays a significant role in the depolarization of the membrane.
Sodium Potassium Pump
Largely responsible for the neuron getting back to resting potential.
Saltatory Conduction
This is the jumping of action potentials between nodes
Excitatory Postsynaptic Potential
Depolarizing current
Inhibitory Postsynaptic Potential
Hyperpolarizing current
Temporal Summation
Two EPSP's in one synapse in rapid succession
Spatial Summation
EPSP's produced simultaneously by DIFFERENT synapses