OSSF - Exam 1 UPDATED Exam Questions
and CORRECT Answers
2 Methods of Digestive System Classification - CORRECT ANSWER - 1. Food source
2. Stomach type
Classification based on Food Source - CORRECT ANSWER - Herbivores (browsers, grazers,
intermediate feeders)
Carnivores
Omnivores
Classification Based on Stomach Type - CORRECT ANSWER - Monogastric
Ruminant
4 Functions Layers of Intestinal Wall - CORRECT ANSWER - 1. One cell separating lumen
from bloodstream (small intestine)
2. Circular and longitudinal muscle
3. Myenteric and submucosal plexuses
4. Villi and microvilli
Countercurrent Effects on Intestinal Villi - CORRECT ANSWER - Hypoxic at intestinal villus
tip due to structure and high metabolic activity
O2 is lost into venous blood
Blood Flow to and from digestive tract - CORRECT ANSWER - Intestines, pancreas, spleen
drain via hepatic portal v into liver
Liver drains via hepatic veins to inferior vena cava (receives more blood from portal circulation
than hepatic a)
, 3 Phases of Digestion - CORRECT ANSWER - 1. Cephalic: sight/thought/smell stimulate
cerebral cortex
2. Gastric: digestion when food enters stomach
3. Intestinal phase: digestion in duodenum
3 Control Systems of GI function - CORRECT ANSWER - 1. Endocrine
2. Paracrine
3. Neuocrine
Neurotransmitters for PNS/SNS - CORRECT ANSWER - ACh (cholingeric): somatic motor
and all preganglionic
PNS: Ach and enteric peptides
SNS: GI tracts uses NE (adrenergic)
Name 4 Enteric Peptides used as Neurotransmitters - CORRECT ANSWER - 1. substance P
2. VIP
3. Neuropeptide Y
4. GRP
PNS/SNS Receptor Types - CORRECT ANSWER - PNS: pre = nicotinic. post = muscarinic
SNS: pre = nicotinic. post = alpha and beta
Enteric Nervous System - CORRECT ANSWER - Submucosal (Meissner) and myenteric
(Auerbach)
Communicate with CNS via vagal, pelvic and splanchnic nn
Draw good overall conceptual slide of enteric nervous system - CORRECT ANSWER -
Lecture 2. Slide 20
and CORRECT Answers
2 Methods of Digestive System Classification - CORRECT ANSWER - 1. Food source
2. Stomach type
Classification based on Food Source - CORRECT ANSWER - Herbivores (browsers, grazers,
intermediate feeders)
Carnivores
Omnivores
Classification Based on Stomach Type - CORRECT ANSWER - Monogastric
Ruminant
4 Functions Layers of Intestinal Wall - CORRECT ANSWER - 1. One cell separating lumen
from bloodstream (small intestine)
2. Circular and longitudinal muscle
3. Myenteric and submucosal plexuses
4. Villi and microvilli
Countercurrent Effects on Intestinal Villi - CORRECT ANSWER - Hypoxic at intestinal villus
tip due to structure and high metabolic activity
O2 is lost into venous blood
Blood Flow to and from digestive tract - CORRECT ANSWER - Intestines, pancreas, spleen
drain via hepatic portal v into liver
Liver drains via hepatic veins to inferior vena cava (receives more blood from portal circulation
than hepatic a)
, 3 Phases of Digestion - CORRECT ANSWER - 1. Cephalic: sight/thought/smell stimulate
cerebral cortex
2. Gastric: digestion when food enters stomach
3. Intestinal phase: digestion in duodenum
3 Control Systems of GI function - CORRECT ANSWER - 1. Endocrine
2. Paracrine
3. Neuocrine
Neurotransmitters for PNS/SNS - CORRECT ANSWER - ACh (cholingeric): somatic motor
and all preganglionic
PNS: Ach and enteric peptides
SNS: GI tracts uses NE (adrenergic)
Name 4 Enteric Peptides used as Neurotransmitters - CORRECT ANSWER - 1. substance P
2. VIP
3. Neuropeptide Y
4. GRP
PNS/SNS Receptor Types - CORRECT ANSWER - PNS: pre = nicotinic. post = muscarinic
SNS: pre = nicotinic. post = alpha and beta
Enteric Nervous System - CORRECT ANSWER - Submucosal (Meissner) and myenteric
(Auerbach)
Communicate with CNS via vagal, pelvic and splanchnic nn
Draw good overall conceptual slide of enteric nervous system - CORRECT ANSWER -
Lecture 2. Slide 20
