MCQ CHAPTER 18 The Endocrine System Flashcards
1) Which of the following is NOT a function of a hormone?
a) Regulates chemical composition and volume of the internal environment
b) Regulates metabolism
c) Regulates glandular secretions
d) Produces electrolytes
e) Controls growth and development
D
2) When a hormone is present in excessive levels, the number of target-cell receptors may decrease. This is called
a) receptor recognition.
b) sensory adaptation.
c) paracrine regulation.
d) up-regulation.
e) down-regulation.
E
3) Which of the choices below is a type of hormone that acts on neighboring cells without entering the bloodstream?
1. Local hormone
2. Paracrine
3. Autocrine
4. Circulating hormone
a) 1 only
b) 2 only
c) 3 only
d) 4 only
e) Both 1 and 2
E
4) Which of the following are a group of lipid-soluble hormones derived from cholesterol?
a) Steroids
b) Thyroid hormones
c) Nitric oxide
d) Amine hormones
e) Peptide hormones
A
5) Which of the following is an eicosanoid?
1. Prostaglandin
2. Leukotriene
3. Glycoprotein
a) 1 only
b) 2 only
c) 3 only
d) Both 1and 2
e) All of these choices
D
6) Which of the following statements correctly compares water-soluble hormones with lipid- soluble hormones?
a) Both types of hormone are carried in the blood attached to a carrier protein.
b) Both types of hormone almost always stimulate increases in mRNA transcription.
c) Only water-soluble hormones use second messengers.
d) Only water-soluble hormones require a receptor.
e) Lipid-soluble hormones are not found in the bloodstream.
C
7) When one hormone opposes the action of another hormone, it is called a(n)
a) synergistic effect.
b) permissive effect.
c) antagonistic effect.
d) circulating effect.
e) local effect.
C
8) Which of the following is NOT a common method of stimulating hormone secretion from an endocrine cell?
a) Signals from the nervous system
b) Chemical changes in the blood
c) Mechanical stretching of the endocrine cell
d) Releasing hormones.
e) Both Signals from the nervous system and Chemical changes in the blood
C
9) What controls hormone release from the anterior pituitary gland?
a) Muscle contraction
b) The peripheral nervous system
c) Hormones released from the hypothalamus
d) Action potentials from the thalamus
e) Chemical changes in the cerebrospinal fluid (CSF)
C
10) Which of the following anterior pituitary hormones stimulates general body growth?
a) Growth hormone
b) Prolactin
c) Thyrotropin
d) Luteinizing hormone
e) Adrenocorticotropic hormone
A
11) Which of the following anterior pituitary hormones stimulates milk production?
a) Luteinizing hormone
b) Prolactin
c) Thyrotropin
d) Melanocyte-stimulating hormone
e) Adrenocorticotropic hormone
B
12) Which of the following anterior pituitary hormones stimulates the adrenal cortex to secrete cortisol?
a) Leutinizing hormone
b) Prolactin
c) Insulin-like growth factors
d) Melanocyte-stimulating hormone
e) Adrenocorticotropic hormone
E
13) Which of the following anterior pituitary hormones stimulates the gonads to secrete progesterone and/or testosterone?
a) Luteinizing hormone
b) TSH
c) Corticotropin
d) Melanocyte-stimulating hormone
e) Growth hormone
A
14) Which type of anterior pituitary cell secretes human growth hormone?
a) Thyrotrophs
b) Gonadotrophs
c) Somatotrophs
d) Lactotrophs
e) Corticotrophs
C
15) Which of the following pairs of hormones are secreted by the posterior pituitary gland?
a) Prolactin and growth hormone
b) Melatonin-stimulating hormone and oxytocin
c) Oxytocin and antidiuretic hormone
d) Follicle-stimulating hormone and thyroid-stimulating hormone
e) Prolactin and ACTH
C
16) The amount of ADH that is secreted by the posterior pituitary glands varies with
a) blood osmotic pressure.
b) blood calcium levels.
c) blood oxygen levels.
d) blood glucose levels.
e) All of these choices.
A
17) Which of the following hormones opposes the action of parathyroid hormone?
a) Thyroid-stimulating hormone
b) Testosterone
c) Insulin
d) Calcitonin
e) Calcitriol
D
18) Which of the following statements does NOT describe a step in the synthesis and secretion of T3 and T4?
a) Iodide trapping
b) Oxidation of iodide
c) Coupling of T1 and T2
d) Synthesis of calcitonin
e) Iodination of tyrosine
D
19) Parathyroid hormone is the major regulator of the plasma concentration of which of the following ions?
a) Calcium
b) Sodium
c) Potassium
d) Chloride
e) Manganese
A
20) Which of the following conditions would result from hyposecretion of aldosterone?
a) Decreased heart rate
b) Decreased airway dilation
c) Dehydration
d) Decreased oxygen delivery to the brain
e) Metabolic acidosis
C
21) Which of the following is NOT a common effect of glucocorticoid stimulation?
a) Protein and fat breakdown
b) Glucose formation
c) Depression of immune responses
d) Reduction of inflammation
e) Increased production of all types of blood cells
E
22) Which blood glucose-lowering hormone is produced by the pancreatic islet cells?
a) Insulin
b) Glucagon
c) Somatostatin
d) Thyroid hormones
e) Calcitonin
A
23) Which of the following hormones promotes increases in the basal metabolic rate (BMR)?
a) Insulin
b) Adrenocorticotropic hormone
c) Glucagon
d) Thyroid hormone
e) Calcitonin
D
24) Which of the following hormones are released in response to decreases in blood glucose concentration?
a) Insulin
b) Luteinizing hormone
c) Glucagon
d) Parathyroid hormone
e) Calcitonin
C
25) Which of the following hormones play key regulatory roles in the body’s long-term response to stress?
a) Insulin, Glucagon, Thyroid hormone
b) hGH, Insulin, Aldosterone
c) Cortisol, hGH, Thyroid hormone
d) Parathyroid hormone, Cortisol, hGH
e) Calcitonin, Thyroid hormone, Insulin
C
26) Which of the following is NOT a common response of the body to long-term stress?
a) Increased lipolysis
b) Increased glycogenesis
c) Increased gluconeogenesis
d) Increased digestive activities
e) Increased breakdown of proteins
D
27) Which of the labeled endocrine glands secretes hGH, TSH, FSH and other hormones?
a) A
b) B
c) C
d) I
e) D
B
28) Which of the labeled endocrine glands secretes hormones that regulate the basal metabolic rate (BMR)?
a) C
b) D
c) A
d) G
e) I
A
29) Which of the following labeled endocrine glands secretes hormones that regulate blood calcium levels?
a) B
b) A
c) H
d) D
e) I
E
30) Which of the labeled endocrine glands secretes steroid hormones in response to long-term stress?
a) D
b) G
c) H
d) I
e) F
C
31) Which of the following is NOT an endocrine gland aging effect?
a) Rise in the blood levels of PTH
b) Less cortisol and aldosterone production
c) Decreased levels of gonadotropins
d) Decreased levels of calcitriol and calcitonin
e) Increase in thymus size
E
32) Which zone of the adrenal gland secretes aldosterone?
a) A
b) B
c) C
d) D
e) None of the zones
A
33) Which zone of the adrenal gland secretes androgens?
a) A
b) B
c) C
d) D
e) None of the zones
C
34) Which labeled structure in the diagram secretes glucagon?
a) A
b) B
c) C
d) D
e) E
B
35) Which labeled structure in the diagram secretes a hormone that stimulates events that lower blood glucose concentration?
a) A
b) B
c) C
d) D
e) E
C
36) Which of the following is an incorrect pairing of a body system and an endocrine contribution to that system?
a) Thyroid hormones promote normal development and growth of the skeleton.
b) Erythropoietin regulates the amount of oxygen carried in blood by adjusting the number of red blood cells.
c) Leptin enhances appetite.
d) Glucocorticoids depress inflammation and immune responses.
e) Epinephrine depresses the activity of the digestive system.
C
42) Which of the following hormones is produced in zone of adrenal gland labeled B?
a) cortisol
b) epinephrine
c) norepinephrine
d) glucagon
e) androgens
A
43) Which of the following describes a function of a hormone produced in zone of the adrenal gland labeled B?
a) enables body to resist stressors and also increases blood glucose
b) intensifies sympathetic responses in other parts of the body
c) accelerates formation of glucose from glycogen (glycogenolysis)
d) stimulates growth of axillary and pubic hair
e) stimulates breast development and milk secretion
A
44) Which of the following conditions could potentially result from hyposecretion of a hormone released by the portion of the marked gland in the diagram?
a) tetany
b) acromegaly
c) diabetes insipidus
d) goiter
e) Cushing’s syndrome
C
45) Identify the stalk-like structure labeled A in the diagram.
a) hypothalamus
b) anterior pituitary
c) posterior pituitary
d) infundibulum
e) hypophyseal fossa
D
46) The endocrine gland shown in the diagram is found in a depression in the sphenoid bone (marked in the diagram) called the
a) maxilla.
b) infundibulum.
c) primary plexus.
d) cribiform plate.
e) hypophyseal fossa
E
47) Which of the following bones (marked in the diagram) contains a depression which houses the endocrine gland shown in the diagram?
a) maxilla
b) sphenoid bone
c) mandible
d) ethmoid bone
e) temporal bone
B
48) Which of the following hormones is produced by the cells marked in the thyroid follicle shown in the histology picture?
a) calcitonin
b) vasopressin
c) triiodothyronine (T3)
d) antidiuretic hormone (ADH)
e) calcitriol
C
49) Which of the following hormones is produced by the cells marked in the thyroid follicle shown in the histology picture?
a) calcitonin
b) vasopressin
c) triiodothyronine (T3)
d) antidiuretic hormone (ADH)
e) calcitriol
A
50) What is the major function of the hormone produced by the cells marked in the thyroid follicle shown in the histology picture?
a) Involved in regulation of calcium homeostasis.
b) Enhances contraction of smooth muscle cells in the uterus during delivery.
c) In females, initiates development of oocytes. In males, stimulates sperm production.
d) Decreases urine volume.
e) Increases blood levels of Na+ and water.
A
51) Which of the following diseases result when the cells marked in the histology image are destroyed by the immune system?
a) Cushing’s disease
b) Addison’s disease
c) Acromegaly
d) Type 1 diabetes
e) Diabetes insipidus
D
52) What endocrine abnormality does the individual on the left in the picture of identical twins have?
a) Goiter
b) Graves’ Disease
c) Type 2 diabetes
d) Cushing’s syndrome
e) Gigantism
E
53) The disorder shown in one of the identical twins seen in this figure is due to a hypersecretion of hormones by which endocrine gland?
a) Thyroid gland
b) Pineal gland
c) Parathyroid gland
d) Pituitary gland
e) Pancreas
D
54) The patient shown is suffering from a disease called _____, caused by a pituitary hypersecretion of hGH during adulthood.
a) Goiter
b) Graves’ Disease
c) Acromegaly
d) Cushing’s syndrome
e) Giantism
C
55) Which of the following endocrine disorders is the individual shown in this picture suffering from?
a) Acromegaly
b) Graves’ Disease
c) Goiter
d) Cushing’s syndrome
e) Giantism
C