PSL 310 -Exam 1 Questions with All
Complete Answers 2026 Updated.
Physiology is the study of - Answer how organisms function
Differentiated cells with similar properties aggregate and arrange themselves in various
combinations to form __________. Two or more of these arranged in various proportions and
patterns, such as sheets, tubes, layers, bundles, and strips, are considered __________. -
Answer tissue; organs
The skin is part of the organ system called the _______ system. - Answer integumentary
The branch of biology that investigates how living organisms function is known as - Answer
physiology
The body fluid compartment with the largest volume is the - Answer intracellular fluid
compartment
According to the levels of cellular organization, a kidney is best described as a(n) - Answer
organ
Plasma is the term that refers to - Answer the liquid portion of blood
What is the relationship between organs and tissues? - Answer Organs are made up of
tissues.
______ fluid is any body fluid that is not found inside cells. - Answer Extracellular
The two major aqueous compartments of the body are the ______ fluid compartment and the
________ fluid compartment. - Answer intracellular; extracellular
The liquid portion of blood in which blood cells are suspended is called - Answer plasma
Any fluid of the body that is not contained in the cells is called ______ fluid. - Answer
extracellular
The term that means to maintain a relatively stable internal environment is ________ - Answer
homeostasis
, Approximately what fraction of the body weight in an adult is comprised of water? - Answer
55-60%
A given variable may fluctuate in the body in the short term but is stable and predictable in the
long term. This describes the concept that homeostasis is in a state of _______ _______ -
Answer dynamic; constancy/consistency
The primary component of intracellular and extracellular fluid is - Answer water
A homeostatic control system regulates the activities of cells, tissues and organs so that any
change in the __________ ______ initiates a reaction to correct the change - Answer
extracellular fluid
A homeostatic control system works to return a physiological variable toward its - Answer set
point
To regulate their own activity, cells must maintain the same fluid composition between
intracellular and extracellular fluid compartments. - Answer False. Maintaining differences in
fluid composition between intracellular and extracellular fluid compartments is an important
way in which cells regulate their own activity.
The maintenance of a relatively stable internal environment is termed - Answer homeostasis
At a room temperature of 5°C, the first homeostatic response is that blood vessels to the skin
become ________, ________ the amount of blood flowing through the skin. This ultimately
helps slow the loss of heat from the body - Answer constricted, thus reducing
Which of these best describes the state of homeostatic variables? - Answer Dynamic
constancy within a range
Any change in the internal environment initiates a reaction to correct the change. The
compensating mechanisms that mediate such responses are performed by ______ _______
systems. - Answer homeostatic; control
In a homeostatic control system, the normal target value (or level) of a variable that the system
works to maintain is called the ______ _______ - Answer set point
Body temperature is regulated around a set point of 37o Celsius by a mechanism known as a(n)
______ feedback loop - Answer negative
Complete Answers 2026 Updated.
Physiology is the study of - Answer how organisms function
Differentiated cells with similar properties aggregate and arrange themselves in various
combinations to form __________. Two or more of these arranged in various proportions and
patterns, such as sheets, tubes, layers, bundles, and strips, are considered __________. -
Answer tissue; organs
The skin is part of the organ system called the _______ system. - Answer integumentary
The branch of biology that investigates how living organisms function is known as - Answer
physiology
The body fluid compartment with the largest volume is the - Answer intracellular fluid
compartment
According to the levels of cellular organization, a kidney is best described as a(n) - Answer
organ
Plasma is the term that refers to - Answer the liquid portion of blood
What is the relationship between organs and tissues? - Answer Organs are made up of
tissues.
______ fluid is any body fluid that is not found inside cells. - Answer Extracellular
The two major aqueous compartments of the body are the ______ fluid compartment and the
________ fluid compartment. - Answer intracellular; extracellular
The liquid portion of blood in which blood cells are suspended is called - Answer plasma
Any fluid of the body that is not contained in the cells is called ______ fluid. - Answer
extracellular
The term that means to maintain a relatively stable internal environment is ________ - Answer
homeostasis
, Approximately what fraction of the body weight in an adult is comprised of water? - Answer
55-60%
A given variable may fluctuate in the body in the short term but is stable and predictable in the
long term. This describes the concept that homeostasis is in a state of _______ _______ -
Answer dynamic; constancy/consistency
The primary component of intracellular and extracellular fluid is - Answer water
A homeostatic control system regulates the activities of cells, tissues and organs so that any
change in the __________ ______ initiates a reaction to correct the change - Answer
extracellular fluid
A homeostatic control system works to return a physiological variable toward its - Answer set
point
To regulate their own activity, cells must maintain the same fluid composition between
intracellular and extracellular fluid compartments. - Answer False. Maintaining differences in
fluid composition between intracellular and extracellular fluid compartments is an important
way in which cells regulate their own activity.
The maintenance of a relatively stable internal environment is termed - Answer homeostasis
At a room temperature of 5°C, the first homeostatic response is that blood vessels to the skin
become ________, ________ the amount of blood flowing through the skin. This ultimately
helps slow the loss of heat from the body - Answer constricted, thus reducing
Which of these best describes the state of homeostatic variables? - Answer Dynamic
constancy within a range
Any change in the internal environment initiates a reaction to correct the change. The
compensating mechanisms that mediate such responses are performed by ______ _______
systems. - Answer homeostatic; control
In a homeostatic control system, the normal target value (or level) of a variable that the system
works to maintain is called the ______ _______ - Answer set point
Body temperature is regulated around a set point of 37o Celsius by a mechanism known as a(n)
______ feedback loop - Answer negative
