Biol 1108 Exam #1 Questions with
Correct Answers 2025-2026
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 2025-2026
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
