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baby bio2
aseir
174
Biology
Undergraduate 1
03/22/2010

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Term
cholesterol
Definition
lipid that is carred by carrier proteins, transport to blood
Term
LDL (low density lipoproteins)
Definition
cholesterol to heart that is associated with blocked blood vessels, high blood pressure, heart attacks, ad correlates with cancer.
Term
HDL (high density lipoproteins)
Definition
cholesterol to liver and lowers risk of cardiovascular disease, exercise increases these, smoking decreases them.
Term
herbivorous
Definition
eat plant material
Term
carnivorous
Definition
eat strictly flesh
Term
omnivorous
Definition
eat both plant and animal material
Term
digestion
Definition
process of converting food into useful energy
Term
ingestion
Definition
taking in food
Term
mechanical digestion
Definition
food physically broken down into smaller pieces
Term
chemical digestion
Definition
enzymes break down food.
proteins--> amino acids
nucleic acids--> nucleotides
polysaccharide/disaccharide--> monosaccharide
Term
body parts in digestion
Definition
1) Mouth, esophagus, stomach, small intestine, large intestine, rectum, anus
Term
glands in digestive system
Definition
salivary glands, liver, gall bladder, pancreas
Term
peristalsis
Definition
waves of smooth muscle contractions
Term
sphincter
Definition
ringlike muscles; act like valves
Term
cardiac sphincter
Definition
Closes off stomach from esophagus
Term
Pyloric sphincter
Definition
Closes off small intestine from stomach
Term
3 phases of respiration
Definition
breathing, transport of gases by the circulatory system, exchange of gases with body cells to the mitochondria
Term
3 caracteristics of respiratory surfaces
Definition
moist, single cell layer, gas diffusion
Term
trcheal respiration
Definition
direct exchange with body cells
Term
trcheal respiration
Definition
direct exchange with body cells
Term
respiration tract
Definition
nasal cavity, pharynx, esophagus, larynx, trachea, lungs, bronchus, bronchiole, alveoli
Term
trachea
Definition
c-shaped cartilage rings
Term
alveoli
Definition
air sacs of the lungs
Term
breathing
Definition
passive process
air inhaled
Rib cage expands as rib musclescontract
Diaphragm contracts (moves down)
Pulling ribs up and out
pulling thoracic cavity down
Term
residual volume
Definition
can never force all air out of the lungs
Term
breathing cntrol centers
Definition
allow us to breathe while sleeping, they are the pons and the medulla oblongata
Term
diastolic blood pressure
Definition
resting blood pressure
Term
systolic blood pressure
Definition
blood pressure whn muscles are contracted
Term
heart murmurs
Definition
when valves do not close completely leads to a backflow of blood
Term
blood pressure
Definition
pushing against arterial walls
Term
hypertension
Definition
high blood pressure (140/90 or more)
Term
heart attack
Definition
Special blood supply to heart--coronary arteries
Blockage leads to muscle cell death--myocardial infarction: 1/3 die; inefficient pumping
Term
stroke
Definition
death of brain tissue due to blockage of head arteries
Term
atherosclerosis
Definition
hardening of arteries because of plaque
Term
blood
Definition
plasma (55%), cells (45%). plasma is 90% water
Term
fibrinogin
Definition
fiber mesh that clots blood
Term
erythrocyte
Definition
red blood cells, Transport oxygen
and help transport carbon dioxide
Term
leukocyte
Definition
white blood cell, attacks viruses and cacer cells by releasing chemicals
Term
phagocytes
Definition
engulf and digest bacteria and cellular debris
Term
platelets
Definition
not cells, help with blood clotting
Term
pathogens
Definition
infection agents that cause disease (viruses-nonliving, bacteria-prokaryotes, protozoans-eukarotes)
Term
two types of immunity
Definition
innate imuunity and aquired immunity
Term
tools of innate immunity
Definition
skin, nostril hairs, mucous membranes, ciliated respiratory lining
Term
interferons
Definition
proteins created by virus-infected cells that help other cells resist the virus
Term
inflammatory response
Definition
histamine release triggered by microorganisms or injury that promotes increased blood flow
Term
anatomy
Definition
the study of the form of an oranism's structures
Term
physiology
Definition
study of the function of structures
Term
epitheliel tissue
Definition
sheets of tightly packed cells that cover body surfaces and line internal organs and cavities
Term
epitheliel tissue
Definition
sheets of tightly packed clls that cover body surfaces and line internal organs and cavities
Term
simple squamous (tiles)
Definition
air sacs of lungs
Term
simple cuboidal epithelium
Definition
screte/exchange
molecules, lines kidneys
Term
simple columnar epithelium
Definition
found in the intestine
Term
pseudostratified ciliated columnar epithelium
Definition
fake appearance of
layering, found in
respiratory tract
Term
stratified squamous epithelium
Definition
can be found in the
esophagus
Term
connective tissue
Definition
sparse population of cells scattere thrugh an extracellular matrix. cells produce the matrix, which is a web of fiber.
Term
loose connective tissue
Definition
can be found underneath the skin
Term
fibrous connective tissue
Definition
is used when forming a tendon
Term
adipose tissue
Definition
fat tissue cells that each have a fat droplet, the size of the fat droplet gives the size of someone's body. Different people are born with different numbers of adipose tissue, when a person gains weight the tissue grows, when people lose weight the tissue shrinks.
Term
msucle tissue
Definition
Long bundles of long cells; cytoplasm contains contractile proteins that are arranged anatomically for contraction, and arranged in parallel
Term
three types of muscle tissue
Definition
skeletal, smooth, cardiac
Term
skeletal muscle
Definition
striated and multi-nucleic
Term
cardiac muscle
Definition
found in the heart
Term
smooth muscle
Definition
(each cell is its own entity) it doesn’t have stripes on it, and has a smooth appearance. It can not be controlled (in the digestive system)
Term
CT scanning
Definition
§ Computed tomography
§ x-ray based
§ Thin cross-sections -- individual or stacked
Term
PET scanning
Definition
Positron emission tomography
Information about metabolic activity
Glucose + radioactive isotope.
Term
integumentary system
Definition
hair, skin, and nails
Term
epidermis
Definition
stratified squamous epithelium that replenishes itself (Rapid cell division near base of epidermis,Keratin and waterproofing glycolipid, Dead cells for 2 weeks ) and have a Waterproof covering (Dehydration & Microbes)
Term
dermis (majority)
Definition
inner layer of dense connective tissue that holds hair follicles, oil and sweat glands, muscles, nerves, sensory receptors, blood vessels
Term
hypodermis
Definition
contains mostly adipose tissue
Term
functions of skin
Definition
waterproof (water in and out), info about weather (pressure, motion, temperature; nervous system), temperature regulation, and synthesis (vitamin D)
Term
function of hair
Definition
Oil at follicle lubricates, conditions (anti-bacterial)
insulation and sensory
Term
function of nails
Definition
protective covering
Term
Negative feed back loops
Definition
a) Stimulus and response are inversely related (i. e. thermostat and temperature control)
b) Decreasing temerperature: furnace kickks on (heat)
c) Increasing temperature: air-conditioner kicks on (cool)
Term
kinds of teeth
Definition
incisors, canines, premolars, molars, wisdom tooth
Term
saliva
Definition
Mucus (glycoprotein)
Buffers Antibacterial Amylase: enzyme, hydrolyzes starch
(Breaks down carbohydrates in the mouth)
Term
pharynx
Definition
throat. trachea is covered by epiglottis. connected to esophagus, which has esophageal sphincter (closes off esophagus to kep food from coming back up)
Term
stomach
Definition
maximum capacity of 2 liters.
linging is replaced every 3 days.
mechanical digestion (smooth muscle contraction), chemical digestion (gastric juice)
Term
gastric juice
Definition
mucus (for lubrication and protection of stomach lining to not be digested), HCL (which converst pepsinogen to pepsin-an active enzyme), and pepsinogen. the meal then turns to chyme.
Term
stomach diseases
Definition
gastric ulcers and peptic ulcers that form because of bacteria (helicobacter pylori) that breech the mucus layer of the stomach
Term
pancreatic juice
Definition
enzymes and bicarbonate
Term
sucrase
Definition
breaks down sucrose
Term
small intestine
Definition
main site of chemical digestion and nutrient absorbtion
Term
liver
Definition
detox and blood glucose level regulation
Term
function of water in plasma
Definition
solvent for carrying other sbstances
Term
blood electrolytes
Definition
Sodium
Potassium
Calcium
Magnesium
Chloride
Bicarbonate
Term
function of blood electrolytes
Definition
Osmotic balance, pH buffering, and
regulation of membrane permeability
Term
pus
Definition
dead WBCs + leaked capillary fluid
Term
Fever
Definition
stimulate phagocytosis and repair
Term
Septic shock
Definition
massive systemic inflammatory
response due to bacterial infection
Term
antigen
Definition
any foreign molecule that triggers response
Term
ntibodies
Definition
protein in plasma that binds to speific antigen
Term
acquired immunity
Definition
defensive responses activated only AFTER the exposure to pathogens
Term
lymphocyte b cells
Definition
mature in bone
marrow; reside in lymphatic
system; secrete antibodies
Term
lymphocyte t cells
Definition
mature in thymus; reside in lymphatic system; attack infected cells, promote
phagocytosis; stimulate B cells to produce antibodies
Term
lymphocyte t cells
Definition
mature in Tymus; reside in lymphatic system; attack infected cell, promote phagocytosis, stimulate B cells to make antibodies
Term
allergies
Definition
hypersensitive responses to antibodies
Term
hormones
Definition
signaling molecules secreted into
circulation that regulate a VAST number of cellular processes
Term
endocrine glands
Definition
hypothalamus, pituitary gland, thyroid gland, adrenal gland, gonad, pancreas
Term
hormone signaling
Definition
Bind to receptor proteins on target cells
Mediate responses to environmental stimuli and regulate growth, development, and reproduction
Term
Protein-type hormones
Definition
are water soluble and polypeptides and amines
Term
steroid hormones
Definition
are not soluble in water but soluble in lipids
Term
reception
Definition
ligand-receptor binding
Term
ligand
Definition
generic term for a molecule
which binds a receptor
Term
signaling transduction
Definition
Binding of a hormone to its receptor initiates a pathway of events, leading to responses in the cytoplasm, enzyme activation, or a change in gene expression
Term
pineal gland
Definition
Pea-sized, near brain center.
Entrains biorhythms to
light-dark cycle, esp sleepwake
cycle
Term
thymus gland
Definition
Peptide hormone that
stimulates T cell
development
Term
posterior pituitary gland
Definition
extension of the hypothalamus, stores and secretes 2 hormones produced by the hypothalamus
Term
oxytocin
Definition
uterine muscle contraction in labor;
mammary gland milk secretion in nursing
Term
anterior pituitary gland
Definition
Synthesize & secrete numerous hormones
into the blood. Hypothalamus controls
it by releasing and inhibiting hormones
Term
TSH
Definition
thyroid stimulating hormone
Term
ACTH
Definition
mediates stress signal and activates adrenals
Term
FSH
Definition
reproductive
Term
LH
Definition
reproductive
Term
GH
Definition
signals entire body, protein synthesis, using fat for energy, growth and development of body parts.
Term
hormone homeostasis
Definition
regulated by negative feedback
Term
thyroid gland
Definition
Just under the larynx. Affect all body tissues. In humans, raises metabolism
Maintains normal bp (blood pressure), heart rate, muscle tone, digestion, reproductive functions
Term
adrenal glands
Definition
Atop the kidneys
Adrenal medulla – “fight-or-flight” hormones. Adrenal cortex “long term stress” hormones
Term
gonads
Definition
○ Produce gametes and produce sex hormones
Term
asexual reproduction
Definition
One parent. One genome. Genetically-identical offspring ("clone")
Term
fission
Definition
type of asexual reproduction in which the parent divides into two daughter cells
Term
budding
Definition
type of asexual reproduction in which the offspring is an outgrowth of the parent
Term
fragmentation
Definition
the parent breaks off into little pieces and voila. babies.
Term
sexual reproduction
Definition
Two parents. Two genomes contribute. Genetic variety: offspring has traits from both parents
Term
Corpus luteum
Definition
produces projesterone (which maintains pregnancy)
Term
oogenesis
Definition
development of a mature ova
i. Produces only one (as opposed to 4 sperm) mature haploid ovum, 2 polar bodies
ii. Long "resting" periods, whereas sperm are produced in uninterrupted sequences
iii. Eggs not produced continuously throughout life
iv. Rest in Meiosis 2 until sperm is present
1) Finishes meiosis then

No egg becomes mature until sperm comes along
Term
spermatogenesis
Definition
production of mature sperm
i. Straightforward
1) Meiosis 1
2) Meiosis 2
3) Produces 4 mature gametes
ii. Produced continuously throughout reproductive life
Term
zygote
Definition
fertilized egg
Term
embryo
Definition
from 2-cell stage til 8 weeks
Term
fetus
Definition
from 8 weeks on
Term
pregnancy
Definition
40 weeks from time of last menstrual cycle
Term
conception
Definition
fertilization of egg by sperm
Term
acrosome
Definition
head of sperm cell, stores enzymes for penetrating egg. has a haploid nucleus
Term
First Trimester
Definition
i. Pregnancy is 38 weeks(fertilization, 40 weeks (menses)
ii. Endometrium grows around blastocyst
iii. Inner cell mass (stem cells)
iv. Forms placenta: part embryonic & part maternal
v. When a lot of genetic mutations can become problematic
vi. Organogenesis
Term
second trimester
Definition
i. Fetal activity
ii. Placenta is sole source of progesterone
1) No longer corpus luteum
2) Mother/baby blood supply almost intertwined
Term
third trimester
Definition
i. Mother's abdominal organs displaced, extreme discomfort
ii. High estrogen levels induce oxytocin receptors in uterine muscle
1) Oxytocin (fetal and maternal) induces labor
iii. Parturition
Term
neuron
Definition
single nerve cell
Term
nerve
Definition
cluster of axons
Term
myelin
Definition
increases conduction velocity
Term
peripheral nervous system
Definition
- Transmits information to and from the central nervous system
- It regulates movement and the internal environment
Term
somatic nervous system
Definition
voluntary movements; skeletal muscle
Term
autonomic nervous system
Definition
involuntary; regulates internal organs. 2 divisions: sympathetic and parasympathetic
Term
action potential
Definition
An electrical impulse that propagates down the axon.Arises from the sequential influx of sodium ions (depolarize)and efflux of potassium ions (repolarize) through ion channels
Term
acetylcholine
Definition
motor neurons --> muscle cells
Term
serotonin
Definition
sleep and wakefulness, mood
Term
dopamine
Definition
motivation and
reward
Term
GABA
Definition
major inhibitory neurotransmitter of CNS
Term
caffeine
Definition
counteracts inhibitory neurotransmitters
Term
alcohol
Definition
possibly increases GABA effects
Term
valium
Definition
activates GABA receptors
Term
ritalin
Definition
thought to block re-uptake of dopamine
Term
ganglia
Definition
cluster of neuron cell bodies
Term
cerebrum
Definition
largest part of the brain, cortex is divided into two parts (gray matter-cell bodies, and white matter-axons of cell bodies)and divided into two sides (right and left)
Term
corpus callosum
Definition
the way the right and left hemispheres of the brain communicate
Term
frontal lobe
Definition
planning, cognitive functions, delaying gratification, speech, MOTOR CORTEX
Term
parietal lobe
Definition
touch, SOMATOSENSORY CORTEX
Term
temporal lobe
Definition
HEARING, smell, auditory association areas
Term
occipital lobe
Definition
visual association areas, VISION
Term
ventricles
Definition
contain cerebrospinal fluid, which cushions the central nervous system
Term
thalamus
Definition
main relay for sensory info to and motor info from cerebrum
Term
hypothalamus
Definition
circadian rhythms, wake/sleep cycles
Term
brainstem consists of
Definition
pons and medulla oblongata
Term
pons
Definition
regulate the breathing centers in the medulla
Term
medulla oblongata
Definition
control centers for breathing, cardiovascualr activity, swallowing, vomiting, and digestion (among others)
Term
cerebellum
Definition
§ Coordination and error checking during motor, perceptual, and cognitive functions

Learning and remembering motor skills
Term
echolocation
Definition
- Produce ultrasonic chirps to lacate prey target, the sound wave bounces off the prey, and the bats measure the delay between the emitted sound pulse and the echo. The pulse rate increases when they approach the target.
Term
electroreceptive animals
Definition
- These animals can detect electric fields through electroreceptors in the skin, but cannot produce an electric discharge (sharks, man other fishes, some amphibians, platypus)
Term
electric animals
Definition
- These animals can produce strong or weak electric discharges (electric eel, electric fish - found in different countries, not the US)
Term
sensory transduction
Definition
turning stimulus energy (from one of the five senses) into an electric signal
Term
pain receptors
Definition
naked nerve endings
• close to the surface
Term
thermoreceptors
Definition
heat, cold
Term
mechanoreceptors
Definition
mechanical stimuli
• touch & pressure
• stretching
• motion
• sound
Term
chemoreceptors
Definition
in nose and taste buds
• chemicals
Term
electroreceptors
Definition
energy of various wavelengths:
• electricity, light, or magnetism
Term
sound pathway
Definition
• outer ear
• tympanic membrane
• middle ear: hammer  anvil  stirrup
• oval window
• cochlea: organ of Corti
• auditory nerve
• brain
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