Biology 436 Exam 1 Practice Questions and Correct Answers
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Module
BIO 436
Institution
BIO 436
Physiology The study of how the body works to maintain life
Pathophysiology The study of how the physiological processes are altered in response to disease or injury
How is homeostasis maintained? Negative feedback loops where the product functions to inhibit the beginning of the cellular process...
Biology 436 Exam 1 Practice Questions
and Correct Answers
Physiology ✅The study of how the body works to maintain life
Pathophysiology ✅The study of how the physiological processes are altered in
response to disease or injury
How is homeostasis maintained? ✅Negative feedback loops where the product
functions to inhibit the beginning of the cellular process
What are the pieces of a negative feedback loop? ✅Sensors: detect variation from the
set point (normal)
Integrating Center: site that collects data and determines how to respond to the
deviation
Effectors: carries out the determined response
Systolic Pressure ✅ventricular contraction
first of the Korotkoff sounds
Diastolic Pressure ✅ventricular relaxation
last of the Korotkoff sounds - last point by which turbulent flow causes blood to hit the
artery wall
Korotkoff Sounds ✅caused by the turbulent blood flow in an artery. the blood pressure
cuff (at above systole) cuts off blood flow through the artery, turbulent flow occurs, then
below diastole smooth (laminar) flow continues
Phospholipid Bilayer MakeUp ✅Hydrophilic head (choline + phosphate + glycerol)
Hydrophobic head (2 fatty acids)
What holds a membrane together? ✅Extracellularly: glycolipids, glycoproteins,
carbohydrates
Intracellularly: cholesterol, proteins, and phospholipids
Diffusion ✅concentration gradient drives movement of small molecules across a
membrane
Simple Diffusion ✅small, hydrophobic molecules move freely across the phospholipid
bilayer without the help of integral proteins
Factors that Affect Membrane Permeability ✅3D shape, size, polarity properties
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