PNB 2265 Exam 3 Questions + Verified
Answers 100% correct
Serous membrane enclosing the digestive system in the
abdominal cavity - Correct Answers ✅Peritoneum
Fold created by the peritoneum covering the ventral
abdomen, stores a lot of adipose tissue - Correct Answers
✅Greater Omentum
Mucosa, Submucosa, Muscularis Externa, Serosa - Correct
Answers ✅Layers of the GI tract from lumen outwards:
Longitudinal layer (outermost), circular layer (innermost) -
Correct Answers ✅Two layers of the muscularis externa
Smooth layer of nervous tissue between the layers of the
muscularis externa, major site of innervation for the GI tract -
Correct Answers ✅Myenteric Plexus
Muscularis mucosae, lamina propria, epithelium - Correct
Answers ✅Three sublayers of the mucosa, from lumen to
outside
Most external layer of mucosa, small layer of smooth muscle
that helps create villi in the GI tract - Correct Answers
✅Muscularis Mucosae
,PNB 2265 Exam 3 Questions + Verified
Answers 100% correct
Layer of connective tissue with small blood and lymph
vessels - Correct Answers ✅Lamina Propria
Layer of the mucosa that forms the lumen, contains most
secretory and absorption cells - Correct Answers
✅Epithelium of Mucosa
Produces forward movement of food through the GI tract,
common in the esophagus, stomach, and large intestine -
Correct Answers ✅Peristalsis
Method of contracting and relaxing smooth muscle that
allows food the move through the Gi tract - Correct
Answers ✅Distal Relaxation/Proximal Contraction
Produces back and forth movements important for mixing
contents of food with secretion, occurs primarily in the small
intestine - Correct Answers ✅Segmentation
Smooth muscle filaments slide away from each other, rather
than toward - Correct Answers ✅What allows smooth
muscle to contract more than cardiac or skeletal muscle?
Long contractions of smooth muscle, commonly seen in
sphincters - Correct Answers ✅Tonic Contractions
, PNB 2265 Exam 3 Questions + Verified
Answers 100% correct
Quick, acute bursts of smooth muscle contraction, commonly
seen during peristalsis and segmentation - Correct Answers
✅Phasic Contractions
Kinase in smooth muscle that converts myosin into
phosphomyosin, causing contraction - Correct Answers
✅Myosin Light Chain Kinase (MLCK)
Phosphotase in smooth muscle that converts phosphomyosin
into myosin, causing relaxation - Correct Answers ✅Myosin
Light Chain Phosphotase (MLCP)
Lead to decreased cAMP levels in smooth muscle, leading to
calmodulin and MLCK activation (via Gi coupled receptors) -
Correct Answers ✅M2 Muscarinic Receptors
Leads to increased Ca+2 levels in smooth levels, leading to
calmodulin and MLCK activation (via Gq coupled receptors) -
Correct Answers ✅M3 Muscarinic Receptors
Protein in smooth muscle cells that activates MLCK when
activated - Correct Answers ✅Calmodulin
Leads to increased cAMP levels in smooth muscle, leading to
MLCK not being activated (via Gs coupled receptors). Relaxes
smooth muscle - Correct Answers ✅Vasoactive Intestinal
Peptide (VIP)
Answers 100% correct
Serous membrane enclosing the digestive system in the
abdominal cavity - Correct Answers ✅Peritoneum
Fold created by the peritoneum covering the ventral
abdomen, stores a lot of adipose tissue - Correct Answers
✅Greater Omentum
Mucosa, Submucosa, Muscularis Externa, Serosa - Correct
Answers ✅Layers of the GI tract from lumen outwards:
Longitudinal layer (outermost), circular layer (innermost) -
Correct Answers ✅Two layers of the muscularis externa
Smooth layer of nervous tissue between the layers of the
muscularis externa, major site of innervation for the GI tract -
Correct Answers ✅Myenteric Plexus
Muscularis mucosae, lamina propria, epithelium - Correct
Answers ✅Three sublayers of the mucosa, from lumen to
outside
Most external layer of mucosa, small layer of smooth muscle
that helps create villi in the GI tract - Correct Answers
✅Muscularis Mucosae
,PNB 2265 Exam 3 Questions + Verified
Answers 100% correct
Layer of connective tissue with small blood and lymph
vessels - Correct Answers ✅Lamina Propria
Layer of the mucosa that forms the lumen, contains most
secretory and absorption cells - Correct Answers
✅Epithelium of Mucosa
Produces forward movement of food through the GI tract,
common in the esophagus, stomach, and large intestine -
Correct Answers ✅Peristalsis
Method of contracting and relaxing smooth muscle that
allows food the move through the Gi tract - Correct
Answers ✅Distal Relaxation/Proximal Contraction
Produces back and forth movements important for mixing
contents of food with secretion, occurs primarily in the small
intestine - Correct Answers ✅Segmentation
Smooth muscle filaments slide away from each other, rather
than toward - Correct Answers ✅What allows smooth
muscle to contract more than cardiac or skeletal muscle?
Long contractions of smooth muscle, commonly seen in
sphincters - Correct Answers ✅Tonic Contractions
, PNB 2265 Exam 3 Questions + Verified
Answers 100% correct
Quick, acute bursts of smooth muscle contraction, commonly
seen during peristalsis and segmentation - Correct Answers
✅Phasic Contractions
Kinase in smooth muscle that converts myosin into
phosphomyosin, causing contraction - Correct Answers
✅Myosin Light Chain Kinase (MLCK)
Phosphotase in smooth muscle that converts phosphomyosin
into myosin, causing relaxation - Correct Answers ✅Myosin
Light Chain Phosphotase (MLCP)
Lead to decreased cAMP levels in smooth muscle, leading to
calmodulin and MLCK activation (via Gi coupled receptors) -
Correct Answers ✅M2 Muscarinic Receptors
Leads to increased Ca+2 levels in smooth levels, leading to
calmodulin and MLCK activation (via Gq coupled receptors) -
Correct Answers ✅M3 Muscarinic Receptors
Protein in smooth muscle cells that activates MLCK when
activated - Correct Answers ✅Calmodulin
Leads to increased cAMP levels in smooth muscle, leading to
MLCK not being activated (via Gs coupled receptors). Relaxes
smooth muscle - Correct Answers ✅Vasoactive Intestinal
Peptide (VIP)
