FSU BSC 1005 Exam 1 questions and
answers graded A+
Ch. 1 - correct answer ✔✔:)
Physiology - correct answer ✔✔The science of biological function
Homeostasis - correct answer ✔✔-refers to the maintenance of a constant internal
environment despite external changes
-changes caused by variation in biological activity within cells, tissues, and organs
Short term and long term homeostatic mechanisms - correct answer ✔✔Deliver enough oxygen
and remove carbon dioxide from tissues
Integrated Physiological Systems- increased oxygen delivery during exercise - correct answer
✔✔-Skeletal Muscles Contract
-ATP used by cross-bridges
-ATP Synthesis
-Requires more O2 and produces more CO2 (mitochondria)
-Lactic acid may also be produced (if not enough O2)
-Blood flow increases in muscle capillaries (Vasodilation)
-CO2 converted to H2CO2 and HCO3 by carbonic anhydrase in RBCs
-Specialized cells in major arteries detect increase in CO2 and HCO3 in blood
-Ventilation of the lungs increases- both breathing rate and volume of air exchange on each
breath increase
-Gas exchange increases between air in alveoli and blood in pulmonary capillaries
,-Cardiac output increases- both HR and SV increase
-More blood delivered to tissues
-Net result is that more d O2 is delivered to working muscles
Examples of homeostatic mechanisms: - correct answer ✔✔maintenance of body temperature
despite changes in environmental temperature
Pathophysiology - correct answer ✔✔Changes in physiology associated with disease
External and internal causes of disease - correct answer ✔✔-External: infection
-Internal: genetic mutations
Why should you understand disease mechanisms and physiological responses to disease? (4) -
correct answer ✔✔-Help us to better relate to and assist, if necessary, relatives or friends who
experience one of these diseases
-Help us to develop a better understanding of normal physiological processes
-Find treatments and cures
-Improve medical practice for human health and reduce death rates for diseases
Ch. 2 - correct answer ✔✔:)
True or False: Our blood is part of the circulatory system - correct answer ✔✔True
Blood is a connective tissue - correct answer ✔✔It connects cells throughout our body as it
continuously circulates within blood vessels
What is blood? - correct answer ✔✔A complex fluid that is more than just a simple liquid
, Cytoplasm - correct answer ✔✔Liquid that is mostly water inside the cell
Two major classes of cells found in human blood - correct answer ✔✔Red blood cells and white
blood cells
Platelets - correct answer ✔✔smaller fragments of cells also present in the blood
Centrifugation - correct answer ✔✔The cells (denser than plasma) collect at the bottom of the
centrifuge tube, which allows us to determine a person's hematocrit
Hematocrit - correct answer ✔✔Percentage of blood volume that is occupied by RBCs
-Measured by centrifugation fo a blood sample
-Typical values for males are 45% and for females 40%
Hematocrit can change in predictable ways - correct answer ✔✔-Increases when people spend
significant amounts of time at elevations when O2 levels are low
-Increases as part of physiological process that produces more RBCs
-Decreases when bleeding
RBCs - correct answer ✔✔-AKA erythrocytes
-Highly specialized for transporting O2
Cytoskeleton - correct answer ✔✔Protein structures inside the cell that provide structural
support in the cell
-Spectrin is one of the main proteins in RBC's cytoskeleton
answers graded A+
Ch. 1 - correct answer ✔✔:)
Physiology - correct answer ✔✔The science of biological function
Homeostasis - correct answer ✔✔-refers to the maintenance of a constant internal
environment despite external changes
-changes caused by variation in biological activity within cells, tissues, and organs
Short term and long term homeostatic mechanisms - correct answer ✔✔Deliver enough oxygen
and remove carbon dioxide from tissues
Integrated Physiological Systems- increased oxygen delivery during exercise - correct answer
✔✔-Skeletal Muscles Contract
-ATP used by cross-bridges
-ATP Synthesis
-Requires more O2 and produces more CO2 (mitochondria)
-Lactic acid may also be produced (if not enough O2)
-Blood flow increases in muscle capillaries (Vasodilation)
-CO2 converted to H2CO2 and HCO3 by carbonic anhydrase in RBCs
-Specialized cells in major arteries detect increase in CO2 and HCO3 in blood
-Ventilation of the lungs increases- both breathing rate and volume of air exchange on each
breath increase
-Gas exchange increases between air in alveoli and blood in pulmonary capillaries
,-Cardiac output increases- both HR and SV increase
-More blood delivered to tissues
-Net result is that more d O2 is delivered to working muscles
Examples of homeostatic mechanisms: - correct answer ✔✔maintenance of body temperature
despite changes in environmental temperature
Pathophysiology - correct answer ✔✔Changes in physiology associated with disease
External and internal causes of disease - correct answer ✔✔-External: infection
-Internal: genetic mutations
Why should you understand disease mechanisms and physiological responses to disease? (4) -
correct answer ✔✔-Help us to better relate to and assist, if necessary, relatives or friends who
experience one of these diseases
-Help us to develop a better understanding of normal physiological processes
-Find treatments and cures
-Improve medical practice for human health and reduce death rates for diseases
Ch. 2 - correct answer ✔✔:)
True or False: Our blood is part of the circulatory system - correct answer ✔✔True
Blood is a connective tissue - correct answer ✔✔It connects cells throughout our body as it
continuously circulates within blood vessels
What is blood? - correct answer ✔✔A complex fluid that is more than just a simple liquid
, Cytoplasm - correct answer ✔✔Liquid that is mostly water inside the cell
Two major classes of cells found in human blood - correct answer ✔✔Red blood cells and white
blood cells
Platelets - correct answer ✔✔smaller fragments of cells also present in the blood
Centrifugation - correct answer ✔✔The cells (denser than plasma) collect at the bottom of the
centrifuge tube, which allows us to determine a person's hematocrit
Hematocrit - correct answer ✔✔Percentage of blood volume that is occupied by RBCs
-Measured by centrifugation fo a blood sample
-Typical values for males are 45% and for females 40%
Hematocrit can change in predictable ways - correct answer ✔✔-Increases when people spend
significant amounts of time at elevations when O2 levels are low
-Increases as part of physiological process that produces more RBCs
-Decreases when bleeding
RBCs - correct answer ✔✔-AKA erythrocytes
-Highly specialized for transporting O2
Cytoskeleton - correct answer ✔✔Protein structures inside the cell that provide structural
support in the cell
-Spectrin is one of the main proteins in RBC's cytoskeleton
