NU551 Unit 4 Exam Questions and Answers
with Verified Solutions | Latest Updated 2026
What is the main purpose of the Maintain homeostasis through hormone
endocrine system? signaling.
How does the endocrine system Both systems work together to regulate
interact with the nervous system? homeostasis.
What do hormones do in the Act as chemical messengers that regulate
body? growth,
metabolism, reproduction, and stress
response.
What are the structural types of Single amino acids, proteins,
hormones? carbohydrates, or
lipids.
What are the major endocrine Pituitary, pineal, thymus, thyroid, adrenals,
glands? pancreas.
What is a target cell? A cell with specific receptors for a
hormone.
What happens if a cell does not It cannot be directly influenced by that
have hormone.
receptors for a hormone?
, What is the difference between Intracrine stays inside the cell and binds
intracrine and autocrine signaling? internal
receptors; autocrine exits the cell and
binds to its
own surface receptors.
What is a key rule about hormones A single hormone can affect multiple
and their effects? organs/processes and may act far from
where it is
produced.
What is an example of neural Autonomic stimulation of pancreatic insulin
control secretion.
of hormones?
What is the difference between Negative feedback reduces further
negative and positive feedback? hormone
release; positive feedback amplifies it.
If thyroxine (T4) levels are high, Low.
what
should TSH levels be?
What is an example of a water- Epinephrine.
soluble amine hormone?
What happens when insulin binds Glucose uptake increases.
to
muscle cells?
with Verified Solutions | Latest Updated 2026
What is the main purpose of the Maintain homeostasis through hormone
endocrine system? signaling.
How does the endocrine system Both systems work together to regulate
interact with the nervous system? homeostasis.
What do hormones do in the Act as chemical messengers that regulate
body? growth,
metabolism, reproduction, and stress
response.
What are the structural types of Single amino acids, proteins,
hormones? carbohydrates, or
lipids.
What are the major endocrine Pituitary, pineal, thymus, thyroid, adrenals,
glands? pancreas.
What is a target cell? A cell with specific receptors for a
hormone.
What happens if a cell does not It cannot be directly influenced by that
have hormone.
receptors for a hormone?
, What is the difference between Intracrine stays inside the cell and binds
intracrine and autocrine signaling? internal
receptors; autocrine exits the cell and
binds to its
own surface receptors.
What is a key rule about hormones A single hormone can affect multiple
and their effects? organs/processes and may act far from
where it is
produced.
What is an example of neural Autonomic stimulation of pancreatic insulin
control secretion.
of hormones?
What is the difference between Negative feedback reduces further
negative and positive feedback? hormone
release; positive feedback amplifies it.
If thyroxine (T4) levels are high, Low.
what
should TSH levels be?
What is an example of a water- Epinephrine.
soluble amine hormone?
What happens when insulin binds Glucose uptake increases.
to
muscle cells?
