Biol 1108 Exam #1 Questions with
Correct Answers 2026
Prolactin is a hormone that has evolved over time and is expressed in many different verte
brate species. The primary function of prolactin in salmon, amphibians, and humans is to -
CORRECT ANSWER -aid in reproduction and ensure the continuation of a species
The neurohormones antidiuretic hormone (vasopressin) and oxytocin are produced by the -
CORRECT ANSWER -hypothalamus and released by the posterior pituitary
Which of the following would serve to change the set point of a regulatory system -
CORRECT ANSWER -feed-forward information
Thyrotropin-
releasing hormone (TRH), which is secreted by the hypothalamus, causes the anterior pituit
ary to produce thyroid-
stimulating hormone (TSH). TSH, in turn, leads the thyroid to produce thyroxine, and thyrox
ine eventually causes reduced TRH secretion. This chain of events is an example of
_ feedback - CORRECT ANSWER -long loop negative
Hormones are secreted by - CORRECT ANSWER -
endocrine glands, such as the thyroid gland and individual cells, such as those lining portio
ns of the digestive tract
Progesterone is secreted by the - CORRECT ANSWER -corpus luteum
During the cycle, low levels of cause a negative feedback on the a
nterior pituitary gland - CORRECT ANSWER -ovarian cycle, estrogen
, Which of the following hormones is secreted by the posterior pituitary gland? -
CORRECT ANSWER -oxytocin
A researcher analyzing the likelihood that a cell will be responsive to a lipid-
soluble hormone should search for the presence of - CORRECT ANSWER -
a specific receptor in the cytoplasm or nucleus
Hormones released by the posterior pituitary are produced in the - CORRECT ANSWER -
hypothalamus
Which of the following is not a characteristic of a hormone - CORRECT ANSWER -
secreted from glands into the interstitial fluid
Rising levels of a released hormone may inhibit its further release from the cells that secre
ted it. This is an example of a hormone having - CORRECT ANSWER -
autocrine function in a negative feedback system
An amine hormone contains: - CORRECT ANSWER -cholesterol
an amino acid chain
both cholesterol and an aromatic amino acid
Estrogen has a positive feedback on the anterior pituitary gland during the phase -
CORRECT ANSWER -follicular phase
Where would you find a receptor of a target cell for a peptide hormone? -
CORRECT ANSWER -on the cell surface
Which of the following statements about positive feedback is false - CORRECT ANSWER -
It is more commonly observed than negative feedback
Correct Answers 2026
Prolactin is a hormone that has evolved over time and is expressed in many different verte
brate species. The primary function of prolactin in salmon, amphibians, and humans is to -
CORRECT ANSWER -aid in reproduction and ensure the continuation of a species
The neurohormones antidiuretic hormone (vasopressin) and oxytocin are produced by the -
CORRECT ANSWER -hypothalamus and released by the posterior pituitary
Which of the following would serve to change the set point of a regulatory system -
CORRECT ANSWER -feed-forward information
Thyrotropin-
releasing hormone (TRH), which is secreted by the hypothalamus, causes the anterior pituit
ary to produce thyroid-
stimulating hormone (TSH). TSH, in turn, leads the thyroid to produce thyroxine, and thyrox
ine eventually causes reduced TRH secretion. This chain of events is an example of
_ feedback - CORRECT ANSWER -long loop negative
Hormones are secreted by - CORRECT ANSWER -
endocrine glands, such as the thyroid gland and individual cells, such as those lining portio
ns of the digestive tract
Progesterone is secreted by the - CORRECT ANSWER -corpus luteum
During the cycle, low levels of cause a negative feedback on the a
nterior pituitary gland - CORRECT ANSWER -ovarian cycle, estrogen
, Which of the following hormones is secreted by the posterior pituitary gland? -
CORRECT ANSWER -oxytocin
A researcher analyzing the likelihood that a cell will be responsive to a lipid-
soluble hormone should search for the presence of - CORRECT ANSWER -
a specific receptor in the cytoplasm or nucleus
Hormones released by the posterior pituitary are produced in the - CORRECT ANSWER -
hypothalamus
Which of the following is not a characteristic of a hormone - CORRECT ANSWER -
secreted from glands into the interstitial fluid
Rising levels of a released hormone may inhibit its further release from the cells that secre
ted it. This is an example of a hormone having - CORRECT ANSWER -
autocrine function in a negative feedback system
An amine hormone contains: - CORRECT ANSWER -cholesterol
an amino acid chain
both cholesterol and an aromatic amino acid
Estrogen has a positive feedback on the anterior pituitary gland during the phase -
CORRECT ANSWER -follicular phase
Where would you find a receptor of a target cell for a peptide hormone? -
CORRECT ANSWER -on the cell surface
Which of the following statements about positive feedback is false - CORRECT ANSWER -
It is more commonly observed than negative feedback
