MASTERING AP ASSIGNMENT 1
(EXAM 1) UPDATE 2026 QUESTIONS
AND ANSWERS WITH COMPLETE
SOLUTIONS GRADED A+
What statement best defines homeostasis? - CORRECT ANSWES -- Homeostasis is
the process whereby the body maintains the internal environment in a state compatible
for life.
The process of maintaining the internal environment in a state compatible for life is
called ________, and it occurs primarily through ________. - CORRECT ANSWES --
homeostasis : negative feedback
A ________ detects a change in a regulated variable and sends that information to a(n)
________ which relays signals to a(n) ________, usually a muscle or a gland. -
CORRECT ANSWES -- sensor : integrating center : effector
Which of the following statements about homeostasis is FALSE?
-The organ systems work together to maintain homeostasis.
-The primary mechanism to maintain homeostasis is positive feedback.
-The extracellular fluid is maintained in a state compatible for life.
-Illness can result if homeostasis is disrupted.
-Homeostasis is the maintenance of the internal environment. - CORRECT ANSWES --
The primary mechanism to maintain homeostasis is positive feedback.
Thermoregulation in the body is an example of __________. - CORRECT ANSWES --
negative feedback
If thermoregulation is a feedback process, then the proper temperature set point is
primarily controlled by the __________. It is also this location that will try to maintain the
body at its set point. - CORRECT ANSWES -- integrating center
The __________ for body temperature control is also known as the __________; its
location is in the __________. - CORRECT ANSWES -- integrating center;
thermoregulatory center; brain
Generically, a homeostatic system should consist of at least __________ components. -
CORRECT ANSWES -- 3
, Both heat exhaustion and heat stroke involve a(n) __________ to dissipate (get rid of)
enough heat from the human body. - CORRECT ANSWES -- inability
The main difference between heat exhaustion and heat stroke is that heat stroke
involves a(n) __________. - CORRECT ANSWES -- improper functioning of the
thermoregulatory system, most importantly the integrating center
A normal adult, maintaining a normal body temperature, would temporarily experience a
__________, if some microorganism were to enter the body and suddenly cause the
body to inappropriately (non-homeostatically) reset its proper temperature set point to a
higher level, like 105°. - CORRECT ANSWES -- chill
A healthy individual subjected to extreme environmental heat will get rid of heat by
__________ to the skin and __________. - CORRECT ANSWES -- vasodilating
(opening) blood vessels; sweating
The wall of the alveolus (air sac) in the lung is composed of which type of epithelium?
-transitional, simple squamous, or simple columnar - CORRECT ANSWES -- simple
squamous epithelium (ideal for the diffusion of gases in the lungs)
The proximal tubule of the nephron (kidney tubule) in the kidney is composed of which
type of epithelium?
-simple cuboidal, stratified squamous, or ciliated pseudostratified columnar - CORRECT
ANSWES -- simple cuboidal epithelium (so secretion and absorption can take place)
The epithelium of the esophagus is composed of which type of epithelial tissue?
-stratified squamous, keratinized stratified squamous, or simple columnar - CORRECT
ANSWES -- stratified squamous epithelium (protects underlying tissues from the wear
and tear of constant swallowing in the esophagus)
Which part of the neuron (a specialized nerve cell) receives signals from other cells and
is also the main metabolic region of the neuron?
-dendrites, axon, or soma - CORRECT ANSWES -- soma (receives inputs (signals)
from other cells and sends the information to the axon. But unlike a dendrite, it also is
the main metabolic and nutritional center of the cell)
Which of the three muscle cell types has multiple nuclei?
-skeletal, smooth, or cardiac - CORRECT ANSWES -- skeletal muscle cells (elongated
and many can be quite long; therefore, they have multiple nuclei)
Which muscle cell type has visible striations but is not under voluntary control?
-smooth, cardiac, or skeletal - CORRECT ANSWES -- cardiac cells (like skeletal cells,
have visible striations but are not under voluntary control)
(EXAM 1) UPDATE 2026 QUESTIONS
AND ANSWERS WITH COMPLETE
SOLUTIONS GRADED A+
What statement best defines homeostasis? - CORRECT ANSWES -- Homeostasis is
the process whereby the body maintains the internal environment in a state compatible
for life.
The process of maintaining the internal environment in a state compatible for life is
called ________, and it occurs primarily through ________. - CORRECT ANSWES --
homeostasis : negative feedback
A ________ detects a change in a regulated variable and sends that information to a(n)
________ which relays signals to a(n) ________, usually a muscle or a gland. -
CORRECT ANSWES -- sensor : integrating center : effector
Which of the following statements about homeostasis is FALSE?
-The organ systems work together to maintain homeostasis.
-The primary mechanism to maintain homeostasis is positive feedback.
-The extracellular fluid is maintained in a state compatible for life.
-Illness can result if homeostasis is disrupted.
-Homeostasis is the maintenance of the internal environment. - CORRECT ANSWES --
The primary mechanism to maintain homeostasis is positive feedback.
Thermoregulation in the body is an example of __________. - CORRECT ANSWES --
negative feedback
If thermoregulation is a feedback process, then the proper temperature set point is
primarily controlled by the __________. It is also this location that will try to maintain the
body at its set point. - CORRECT ANSWES -- integrating center
The __________ for body temperature control is also known as the __________; its
location is in the __________. - CORRECT ANSWES -- integrating center;
thermoregulatory center; brain
Generically, a homeostatic system should consist of at least __________ components. -
CORRECT ANSWES -- 3
, Both heat exhaustion and heat stroke involve a(n) __________ to dissipate (get rid of)
enough heat from the human body. - CORRECT ANSWES -- inability
The main difference between heat exhaustion and heat stroke is that heat stroke
involves a(n) __________. - CORRECT ANSWES -- improper functioning of the
thermoregulatory system, most importantly the integrating center
A normal adult, maintaining a normal body temperature, would temporarily experience a
__________, if some microorganism were to enter the body and suddenly cause the
body to inappropriately (non-homeostatically) reset its proper temperature set point to a
higher level, like 105°. - CORRECT ANSWES -- chill
A healthy individual subjected to extreme environmental heat will get rid of heat by
__________ to the skin and __________. - CORRECT ANSWES -- vasodilating
(opening) blood vessels; sweating
The wall of the alveolus (air sac) in the lung is composed of which type of epithelium?
-transitional, simple squamous, or simple columnar - CORRECT ANSWES -- simple
squamous epithelium (ideal for the diffusion of gases in the lungs)
The proximal tubule of the nephron (kidney tubule) in the kidney is composed of which
type of epithelium?
-simple cuboidal, stratified squamous, or ciliated pseudostratified columnar - CORRECT
ANSWES -- simple cuboidal epithelium (so secretion and absorption can take place)
The epithelium of the esophagus is composed of which type of epithelial tissue?
-stratified squamous, keratinized stratified squamous, or simple columnar - CORRECT
ANSWES -- stratified squamous epithelium (protects underlying tissues from the wear
and tear of constant swallowing in the esophagus)
Which part of the neuron (a specialized nerve cell) receives signals from other cells and
is also the main metabolic region of the neuron?
-dendrites, axon, or soma - CORRECT ANSWES -- soma (receives inputs (signals)
from other cells and sends the information to the axon. But unlike a dendrite, it also is
the main metabolic and nutritional center of the cell)
Which of the three muscle cell types has multiple nuclei?
-skeletal, smooth, or cardiac - CORRECT ANSWES -- skeletal muscle cells (elongated
and many can be quite long; therefore, they have multiple nuclei)
Which muscle cell type has visible striations but is not under voluntary control?
-smooth, cardiac, or skeletal - CORRECT ANSWES -- cardiac cells (like skeletal cells,
have visible striations but are not under voluntary control)
