Ch. 49 Questions Flashcards
Which of the following statements are correct?
I) Hormones often regulate homeostasis through antagonistic functions.
II) Hormones of the same chemical class usually have the same function.
III) Hormones are secreted by specialized cells usually located in exocrine glands.
IV) Hormones are often regulated through feedback loops.
Hormones often regulate homeostasis through antagonistic functions.
Hormones are often regulated through feedback loops.
External chemical signals that coordinate potential reproductive partners are called _____.
A) paracrine signals B) hormones C) gametes D) pheromones E) cytokines
D) pheromones
Which of these glands is located within the abdominal cavity?
A) thyroid
B) parathyroid
C) pituitary
D) pancreas
D) pancreas
Which of these glands is located within the abdominal cavity?
A) thyroid
B) parathyroid
C) pituitary
D) pancreas
D) pancreas
Oxytocin and antidiuretic hormone (ADH) are synthesized in the _____.
A) anterior pituitary B) adenohypophysis C) posterior pituitary D) hypothalamus E) adrenal cortex
D) hypothalamus
Fight-or-flight reactions include activation of the _____.
A) thyroid gland, leading to an increase in the blood calcium concentration
B) anterior pituitary gland, leading to cessation of gonadal function
C) parathyroid glands, leading to increased metabolic rate
D) pancreas, leading to a reduction in the blood sugar concentration
E) adrenal medulla, leading to increased secretion of epinephrine
E) adrenal medulla, leading to increased secretion of epinephrine
Most animal hormones _____.
A) are protein molecules
B) are carried to target cells in the blood or hemolymph
C) elicit the same biological response from all of their target cells
D) are produced by endocrine glands
E) are lipid-soluble molecules
B) are carried to target cells in the blood or hemolymph
Most animal hormones _____.
A) are protein molecules
B) are carried to target cells in the blood or hemolymph
C) elicit the same biological response from all of their target cells
D) are produced by endocrine glands
E) are lipid-soluble molecules
B) are carried to target cells in the blood or hemolymph
What property of steroid hormones allows them to cross the phospholipid bilayer?
A) Steroid hormones act on the same cells in which they are produced and, therefore, are within the cell
they are acting upon.
B) Steroid hormones are lipid soluble and easily cross the phospholipid bilayer.
C) Steroid hormones can act in very small concentrations and very few molecules of steroids need to
cross the lipid bilayer.
D) Steroid hormones act on cells close to where they were produced and very few molecules are required
to travel such a short distance to cross the lipid bilayer.
B) Steroid hormones are lipid soluble and easily cross the phospholipid bilayer.
After drinking alcoholic beverages, increased urine excretion is the result of _____.
A) increased aldosterone production
B) the osmoregulator cells of the brain increasing their activity
C) inhibited secretion of antidiuretic hormone (ADH)
D) increased blood pressure
E) increased reabsorption of water in the proximal tubule
C) inhibited secretion of antidiuretic hormone (ADH)
9) Which of the following best describes the neuroendocrine-to-endocrine pathway of hormone action?
A) A neural organ that produces hormones releases its hormones directly into another gland that it
regulates.
B) A gland releases hormones directly into a neural structure, thus regulating neural functions.
C) A gland exhibits negative feedback on the nervous system by releasing hormones into neural tissue
both directly and indirectly through the circulation .
D) A neural organ that produces hormones regulates another gland through the release of hormones into
the circulation that travel to the affected gland.
D) A neural organ that produces hormones regulates another gland through the release of hormones into
the circulation that travel to the affected gland.
Which of the following hormones does NOT act using a second messenger system?
A) testosterone
B) growth hormone
C) glucagon
D) leptin
A) testosterone
