Anatomy III Exam Flashcards
Where is TSH secreted from?
Anterior Pituitary
What hormones are released by posterior pituitary?
Oxytocin
ADH
What hormone is released by paraventricular nucleus?
Oxytocin
What hormone is released by supraoptic nucleus?
Antidiuretic Hormone
What are tropic hormones and gives some examples
target other endocrine glands
PRL, GH
What causes increase in IGF-1 from liver?
protein
exercise
fasting
sleep
What causes decrease in IGF-1 from liver?
insulin
stress (cortisol)
estrogen
Age of peak secretion from pineal gland?
1-5 year olds
What does calcitonin do and where is it secreted from?
thyroid
decrease Ca++
What does calcitriol do?
increase Ca++ by:
Inc GI absorption
Dec renal excretion
Inc bone resorption
What is bone resorption
osteoclast break down bone to release Ca++ (Inc Blood Ca++)
What are the three main layers of adrenal gland? (in to out)
Adrenal medulla
Adrenal cortex
connective tissue capsule
What are the layers of adrenal cortex (in to out)?
Zona reticularis
Zona fasciculata
Zona glomrulosa
What does the zona reticularis secrete?
DHEA progesterone estrogen testosterone androstenedione
What does the zona fasciculata secrete?
cortisol
What does the zona glomerulosa secrete?
aldosterone
What does the adrenal medulla secrete?
EPI
NE
What is the action of adrenal medulla?
fight or flight
What is the action of zona fasciculata?
regulate blood sugar anti-inflammatory immune response modification heart and blood vessel toning stimulate CNS stress rxn normalization
What is the action of zona reticularis?
antioxidant tissue repair sex hormones balance cortisol anti-aging
What is the action of zona glomerulosa?
aldosterone: inc Na+, dec K+, conserve water –> increase BP
What cell of pancreas secretes insulin?
Beta cell
where is pancreas located?
retroperiotoneal and
inferior and dorsal to stomach
what are Islets of Langerhans
pancreatic islets
contain alpha and beta cells
what is sphincter of Oddi?
where pancreatic duct opens
what does delta cells of pancreas secrete?
somatostatin –> inhibit insulin
What do Sertoli cells do and where are they?
testis
progress germ cells to spermatozoa
What do Leydig cells do and where are they?
testis
produce testosterone
What are granulosa cells?
ovarian cells that surround eggs to form follicles
What do granulosa cells secrete?
estrogen
progesterone
What does somatostastin do and where is it secreted from?
increase glucose
pancreatic delta cells
What do F cells do?
inhibit somatostatin
What does aldosterone do?
Na/K pump: Na in, K out –> water conservation –> increase BP
What is the alimentary canal?
mouth to anus GI tract
What do accessory digestive organs do?
secretions that contribute to food breakdown
What are the layers of alimentary canal?
Mucosa
Submucosa
Muscularis Externa
Serosa/Adventitia
What are the layers of the Mucosa layer and what do they each do?
lamina propria: nutrient absorption
muscularis mucosae: movement
Where is serosa and adventitia each present?
serosa: below diaphragm, intraperitoneal organs
adventitia: esophagus; retroperitoneal organs
What does the submucosa layer do?
vascular, lymphatics, and nerve supplies
What does the muscularis externa do?
peristalsis
What does the serosa/adventitia do?
reduce friction and lubricate
Mesenteric Adenitis
inflammation of lymph nodes
Meissner’s plexus (Submucosal)
regulates glands (enzymes) and smooth muscle
Auberchach’s plexus (Myenteric)
controls motility (pushes food down)
What are the tongue muscles and what do they each do?
Intrinsic: speech; not attached to bone
Extrinsic: protrude and deviate tongue; attach to bone
Lingual frenulum: tongue to floor of mouth
What layer does stomach have that the rest of the alimentary canal doesnt?
innermost oblique layer in muscular externa
What does the parietal cell of stomach secrete?
HCl
What does the chief cell of stomach secrete?
pepsinogen
What cell secretes gastrin in stomach
G cell (neuroendocrine cell)
What does the intrinsic factor in stomach do?
required for B12 absorption in intestines
What does somatostatin in the stomach do?
inhibit acid secretion
What does gastrin do?
regulates stomach secretion and motility
What does histamine in the stomach do?
help produce acid
What are the phases of gastric secretion?
Cephalic
Gastric
Intestinal
What enzyme increases the pH of chyme and what is it secreted by?
Secretin
GIP
CCK
by duodenum
upper esophageal sphincter blood supply
inferior thyroid artery
vein drains from inferior thyroid vein to brachiocephalic v.
thoracic esophagus blood supply
thoracic aorta, bronchial arteries
veins drain from azygous vein to superior vena cava
lower esophagus blood supply
left gastric and left splenic arteries
veins drain from gastric veins to portal system
What is esophageal varices caused by?
portal hypertension, cirrhosis. liver disease
What arteries supply greater curve of stomach
L/R gastro-omental arteries
What arteries supply lesser curve of stomach
L/R gastric a.
What arteries supply fundus of stomach
short gastric a.
What is caput medusa?
portal hypertension with accumulation of peritoneal fluid
What does secretin stimulate?
secretion of sodium bicarbonate from pancreas and bile in liver
What supplies upper duodenum?
gastroduodenal artery
What supplies most of small intestines?
superior mesenteric artery
What layer of small intestines is villi and microvilli in?
mucosa
What is Crypts of Lieberkuhn?
immune cells and STEM cells in mucosa layer of small intestine
What is the strongest layer of small intestine?
submucosa
Where are Brunners Glands and what does it do
duodenum submucosa increase pH (alkaline secretions and inhibit chief and parietal cells)
What are in the submucosal layer and what does each do?
brunners glands: increase pH
peyers patches: lymph nodules in ILEUM
lacteals: lymph capillary absorbs fats in villi
Where is Peyers patches?
Ileum submucosa