BIO 102 (EXAM 1 PRACTICE
TEST)QUESTIONS WITH DETAILED
ANSWERS 2026
In multicellular animals, homeostatic control results in - ANSWERSrelative constancy in
the composition of the extracellular fluid that surrounds the cells
organisms being able to survive in many different external environments
Which plays the major role in the regulation of body temperature in mammals? -
ANSWERShypothalamus
Which of the following terms is not descriptive of homeostasis or homeostatic
mechanisms? - ANSWERSpositive feedback
Continuous monitoring of a modifiable process, and negative feedback to slow or turn
off a process when a pre-set level is achieved are key homeostatic characteristics.
Positive feedback leads to an increase in a process.
Which of the following is not associated with the cell membrane of the target cell. -
ANSWERSreceptor sites for steroid hormones
Response Feedback:
Receptor sites for amino acid based and protein hormones are located on the plasma
membrane of the cell Receptor sites for steroid hormones are inside the cell
The target cells for releasing hormones produced by the hypothalamus are the cells of
the - ANSWERSanterior pituitary.
Response Feedback:
The hypothalamus is the master control center of the endocrine system. It secretes
hormones which only affect and control the pituitary gland. The posterior pituitary stores
hormones made by the hypothalamus.
Which of the following is an example of negative feedback? - ANSWERShigh levels of
thyroxine inhibit the production of TSH-RH by the hypothalamus.
Which of the following is not a part of the "fight or flight" response? - ANSWERSthe
conversion of glucose to glycogen by liver and muscle cells
Response Feedback:
, The fight or flight response prepares an organism to respond to an emergency. The
heart rate and respiration are increased as is the supply of blood - carrying glucose and
oxygen - to muscles. The conversion of glucose to glycogen would decrease the
availability of glucose
The cells most likely to be injured by low blood sugar are - ANSWERSbrain cells
Response Feedback:
The brain stores little, if any sugar, and with any decrease in its availability through the
blood would provide insufficient amounts to produce the ATP needed for life of the cells.
The other types of cells may have stored glucose available or may be able to use an
alternative energy source.
Which of the following pairs does not show an interaction, for example, the stimulation
of production of a second hormone by the first, or the production of a response by a
gland, or tissue? - ANSWERSTSH - glucocorticoids
Response Feedback:
ACTH stimulates the adrenal cortex to produce glucocorticoids. The adrenal medulla
produces epinephrine. Epinephrine is the hormone responsible for the "fight or flight"
response. TSH stimulates the thyroid gland to produce thyroxine; it does not stimulate
glucocorticoid production.
Digestion takes place in specialized compartments, such as food vacuoles, or various
sections of an intestinal tract, for several reasons. Which one of these is NOT one of
those reasons? - ANSWERSThe environment must protect the food.
Response Feedback:
The objective of digestion is to break food molecules into smaller units. Thus, the
environment of digestion certainly would not protect the food. Rather, it must allow
digestive enzymes to function efficiently, at the same time protecting the tissues of the
organism from being digested by its own enzymes.
Which of the following molecules can cross the cell membrane? - ANSWERSglucose, a
monosaccharide
Response Feedback:
Molecules must be in their monomer form to cross the cell membrane. Starch and
hemoglobin molecules are too large. Only glucose is a monomer.
Which of these best describes digestion? - ANSWERSdecomposition of a
macromolecule into its subunits by adding water to each covalent bond that links the
subunits together
Response Feedback:
TEST)QUESTIONS WITH DETAILED
ANSWERS 2026
In multicellular animals, homeostatic control results in - ANSWERSrelative constancy in
the composition of the extracellular fluid that surrounds the cells
organisms being able to survive in many different external environments
Which plays the major role in the regulation of body temperature in mammals? -
ANSWERShypothalamus
Which of the following terms is not descriptive of homeostasis or homeostatic
mechanisms? - ANSWERSpositive feedback
Continuous monitoring of a modifiable process, and negative feedback to slow or turn
off a process when a pre-set level is achieved are key homeostatic characteristics.
Positive feedback leads to an increase in a process.
Which of the following is not associated with the cell membrane of the target cell. -
ANSWERSreceptor sites for steroid hormones
Response Feedback:
Receptor sites for amino acid based and protein hormones are located on the plasma
membrane of the cell Receptor sites for steroid hormones are inside the cell
The target cells for releasing hormones produced by the hypothalamus are the cells of
the - ANSWERSanterior pituitary.
Response Feedback:
The hypothalamus is the master control center of the endocrine system. It secretes
hormones which only affect and control the pituitary gland. The posterior pituitary stores
hormones made by the hypothalamus.
Which of the following is an example of negative feedback? - ANSWERShigh levels of
thyroxine inhibit the production of TSH-RH by the hypothalamus.
Which of the following is not a part of the "fight or flight" response? - ANSWERSthe
conversion of glucose to glycogen by liver and muscle cells
Response Feedback:
, The fight or flight response prepares an organism to respond to an emergency. The
heart rate and respiration are increased as is the supply of blood - carrying glucose and
oxygen - to muscles. The conversion of glucose to glycogen would decrease the
availability of glucose
The cells most likely to be injured by low blood sugar are - ANSWERSbrain cells
Response Feedback:
The brain stores little, if any sugar, and with any decrease in its availability through the
blood would provide insufficient amounts to produce the ATP needed for life of the cells.
The other types of cells may have stored glucose available or may be able to use an
alternative energy source.
Which of the following pairs does not show an interaction, for example, the stimulation
of production of a second hormone by the first, or the production of a response by a
gland, or tissue? - ANSWERSTSH - glucocorticoids
Response Feedback:
ACTH stimulates the adrenal cortex to produce glucocorticoids. The adrenal medulla
produces epinephrine. Epinephrine is the hormone responsible for the "fight or flight"
response. TSH stimulates the thyroid gland to produce thyroxine; it does not stimulate
glucocorticoid production.
Digestion takes place in specialized compartments, such as food vacuoles, or various
sections of an intestinal tract, for several reasons. Which one of these is NOT one of
those reasons? - ANSWERSThe environment must protect the food.
Response Feedback:
The objective of digestion is to break food molecules into smaller units. Thus, the
environment of digestion certainly would not protect the food. Rather, it must allow
digestive enzymes to function efficiently, at the same time protecting the tissues of the
organism from being digested by its own enzymes.
Which of the following molecules can cross the cell membrane? - ANSWERSglucose, a
monosaccharide
Response Feedback:
Molecules must be in their monomer form to cross the cell membrane. Starch and
hemoglobin molecules are too large. Only glucose is a monomer.
Which of these best describes digestion? - ANSWERSdecomposition of a
macromolecule into its subunits by adding water to each covalent bond that links the
subunits together
Response Feedback:
