final exam review Flashcards
define physiology
the study of homeostasis and how the body maintains it
define homeostasis
an attempt to maintain a constant, steady balance, within and around the body
4 GI tract layers (out to in)
serosa
muscular layer
submucosa
mucosa
serosa
connective tissue to hold organs together and epithelial tissue to protect against friction and lubricate
muscular layer
smooth muscle tissue
2 layers (3 in stomach)
layers of muscular layer
circular - mixing
longitudinal - peristalsis
oblique - mixing (stomach)
submucosa
lots of blood vessels and nerves
mucosa
epithelial tissue, changes thru out tract, cells secrete mucus, enzymes, and hormones
parotid salivary gland
ant and inf to ears
submandibular salivary gland
below and medial to mandible
sublingual salivary gland
ant and under tongue
gross anatomy of stomach
cardiac sphincter
fundus
body
pylorus
pyloric sphincter
lesser curve
greater curve w greater omenta
parietal peritoneum
covers all organs
visceral peritoneum
covers each organ (serosa)
rugae
folds in mucosa that allow for distension
4 gastric glands
g cells
chief cells
parietal cells
mucus cells
gastrin
hormone from g cell that causes release of all other cells and their products
pepsinogen
enzyme released by chief cells in inactive form to break protein bonds
HCl
acid produced by parietal cells to kill pathogens
intrinsic factor
allows absorption of Vitamin B12
mucus
made from mucus cells to protect the stomach lining from acid
duodenum
10 in of small int, enzymes and secretions from accessory organs enter here
jejunum
8 ft of small int, digestion and absorption
ileum
12 ft of small int, absorption, joins large int @ ileocecal valve
small intestine physiology
completion of digestion and majority of absorption
cecum
2-3 in pouch of large int, has appendix attch.
ascending colon
vertical part of large int on right of liver
transverse colon
horizontal part of large int, below liver, above small int
descending colon
vertical part of large int, left side of iliac crest
sigmoid colon
“S” shaped part of of large int, goes posterior
rectum
7-8 in of large int, midline of body, tapered
anal canal
last inch of rectum
internal anal sphincter
smooth muscle
external anal sphincter
skeletal muscle, anus
teniae coli
replaces longitudinal muscle, form haustra
haustra
pouches in large int
large int physiology (chem digestion)
NONE, only water and electrolytes absorbed, only mucus produced
haustral churning
mech digestion in large int, pouches distend and push poop to next pouch
peristalsis (due to teniae coli)
2-3 mass peristaltic waves a day (POOPING)
4 lobes of liver
right, left, caudate (post sup), quadrate (post inf)
porta
inf area where hepatic artery, portal vein, and duct are
liver lobules
functional unit of liver, made up of portal triad
portal triad
branch of hepatic artery, portal vein, and duct
hepatocytes
liver cells
sinusoids
micro spaces for blood btwn hepatocytes
central veins
merge into larger veins
bile canaliculi
tiny channels that carry bile to hepatic duct
kupffer cells
phagocytes that line sinusoids and remove foreign particles from blood
main functions of liver
converts substances into usable forms
detox alcohol and drugs
makes bile
basic function of gallbladder
concentrates and stores bile
basic function of pancreas (exocrine)
produce and release enzymes into duodenum for digestion
basic function of pancreas (endocrine)
produce and release hormones into blood
disorder of pancreas
diabetes mellitus
upper respiratory tract
nose, pharynx, larynx
lower respiratory tract
trachea, bronchial tree, lungs
erythrocytes
adult RBCs, no nucleus, kamikaze O2 transporters
reticulocytes
young RBCs with nucleus, lose nuc when mature
neutrophils
phagocytes, reach infection first
eosinophils
responsible for parasitic infections and allergic reactions
basophils
responsible for allergic and antigen responses
t-lymphocytes
directly attack infected cells, no antibodies
b-lymphocytes
produce antibodies that bind to pathogen
monocytes
phagocytes, finish job started by neutrophils, “vacuum cleaner”
hemostasis (vasoconstriction)
smooth muscle in vessel walls contracts & restricts blood flow, platelets accumulate and secrete serotonin to prolong contraction
hemostasis (platelet plug formation)
collagen in tissue attracts more platelets and they accumulate in the damaged area, blocks the opening in blood vessel
hemostasis (coagulation)
prothrombin is in blood, PA is released by platelets and damaged tissue, PA & Ca2+ turn prothrombin –> thrombin which turns fibrinogen –> fibrin which gauzes up on the cut to form good clot
hemostasis (final steps)
after clot forms fibrin contracts, fibroblasts migrate to area and form new connective tissue to repair damage, as healing occurs clot is dissolved thru fibroblasts
type a blood
rbc: A agglutinogens
plasma: anti B agglutinins
type b blood
rbc: B agglutinogens
plasma: anti A agglutinins
type ab blood
rbc: A&B agglutinogens
plasma: no agglutinins
type o blood
rbc: no agglutinogens
plasma: A&B agglutinins
pericardium
double layer membrane surrounding heart
epicardium
outermost layer, contains blood vessels that nourish heart, connective tissue
myocardium
middle layer, responsible for contraction, cardiac muscle tissue
endocardium
innermost layer, forms heart valves, smooth connective tissue
superior chambers of heart
right and left atrium, receive blood and pump to ventricles
auricles of atria
incr volume of blood atria can receive
inferior chambers of heart
right and left ventricles, right pumps blood to lungs, left pumps blood to rest of body
sulcus
external groove for blood vessels to rest
coronary sulcus
external groove separating the atria and the ventricles
interventricular sulcus
external groove separating the R&L ventricles
septum
wall of tissue for separation
interatrial septum
internal wall btwn atria
interventricular septum
internal wall btwn ventricles
heart valves
prevent backflow of blood
atrioventricular valves
btwn atrium and ventricle
tricuspid av valve
btwn R atrium and R ventricle
bicuspid av valve
btwn L atrium and L ventricle
chordae tendineae
connects av valves to papillary muscle in ventricle
semilunar valves
btwn ventricles and main arteries
pulmonary sl valve
btwn R ventricle and pulmonary artery
aortic sl valve
btwn L ventricle and aorta
blood flow (low O2)
low O2 blood from body comes in from the sup and inf vena cava to the right atrium, thru the tricuspid valve, into the right ventricle, thru pulmonary sl valve, into the pulmonary artery to the lungs
blood flow (high O2)
high O2 blood comes back from lungs comes in from pulmonary veins to the left atrium, thru bicuspid valve, into the left ventricle, thru aortic sl valve, into the aorta to the rest of the body
agglutinins
specific antibodies produced in response to foreign antigens
agglutinogens
specific blood antigens, proteins that cause antibodies to respond
bile
emulsifies saturated fats
hemostasis
reactions that stop bleeding & minimize blood loss & tissue damage (good clotting)
hematopoiesis
formation of all blood cells
diaphram
produces pressure gradients that cause respiration
swaying villi
tiny finger-like projections that mix chyme with enzymes and aid in absorption
distension
able to expand in shape and return due to rugae
phagocytes
surrounds and engulfs infection
Thin section of Nephron loop diffuses
Only water