HBIO 202 MIDTERM EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS GRADED

HBIO 202 MIDTERM EXAM QUESTIONS AND ANSWERS

WITH COMPLETE SOLUTIONS GRADED


Digestion

Chemical and mechanical breakdown of food into absorbable units

Absorption

Movement of material from GI lumen to ECF

Motility

Movement of material through the GI tract as a result of muscle contraction.

Secretion

Movement of material from cells into lumen or ECF

Functions of the GI tract

secretion, digestion, absorption, motility

Major Challenges of the GI Tract

Avoid auto-digestion, mass balance, defense

Organs of the GI tract

mouth, pharynx, esophagus, stomach, small intestine, large intestine, rectum

Mouth

Ingestion, mechanical digestion, chemical digestion

pharynx and esophagus

propulsion

Stomach organ of GI tract

, mechanical and chemical digestion and absorption

Small intestine

Mechanical digestion and propulsion, chemical digestion, absorption

Large intestine

Chemical digestion, absorption, propulsion

Rectum

Elimination

tissue

cells of similar structure and function combine to form ______

organs

Tissues combine to form _______, which perform specialized functions.

digestive

Organs work together in organ systems, such as the _________ system.

Mastication

mechanical breakdown of food, mix food with saliva, stimulate taste buds

Saliva

produced by salivary glands, moistening and lubricating food, digestion of carbs

Stomach

muscular organ that continues mechanical digestion. Has a volume of 50 ml, which can

expand up to more than 1L of bolus

HCI

activates enzyme pepsin, enhances absorption of minerals, breaks down connective

tissue of meat