Which of the following statements about the endocrine system is false?
A) It has target cells that are mainly in distant tissues.
B) It affects only cells with appropriate receptors.
C) It releases secretions directly into body fluids.
D) It is regulated by negative feedback mechanisms.
E) It releases hormones,all of which are lipids,directly into the bloodstream.
Correct Answer:
Verified
Q1: Hormones can be divided into different groups
Q2: Steroid hormones
A)are proteins.
B)cannot diffuse through cell membranes.
C)bind
Q2: The functional organization of the nervous system
Q3: Which of the following substances acts as
Q9: Hormones known as "catecholamines" are
A)lipids.
B)peptides.
C)steroids.
D)amino acid derivatives.
E)derivatives
Q10: Norepinephrine and epinephrine are considered to be
Q11: All of the following are true of
Q11: Extracellular membrane receptors are used by all
Q13: When a catecholamine or peptide hormone binds
Q18: Peptide hormones are
A) composed of amino acids.
B)
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