Ch. 20 Mechanisms of Hormone Regulation Flashcards Preview

Patho Test 2 Evolve/Elsevier > Ch. 20 Mechanisms of Hormone Regulation > Flashcards

Flashcards in Ch. 20 Mechanisms of Hormone Regulation Deck (15)
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1
Q

Which of the following is NOT a characteristic of a hormone?
Hormones have specific rates and rhythms of secretion.
Hormones operate independent of feedback systems.
Hormones affect only cells with appropriate receptors.
Kidneys excrete hormones.

A

Hormones operate independent of feedback systems

2
Q

Which of the following is TRUE regarding thyroid hormone and thyroid-stimulating hormone (TSH)?
Decreased anterior pituitary release of TSH stimulates its secretion.
TSH is secreted in excess when stimulated by T4.
TSH secretion is regulated by thyrotropin-releasing hormone.
TSH secretion is controlled by positive feedback.

A

TSH secretion is regulated by thyrotropin-releasing hormone.

3
Q

Which of the following is NOT one of the three responses of hormones when they interact with the receptor?
Acting on preexisting channel-forming proteins to alter membrane permeability
Activating preexisting proteins through a second-messenger system
Activating genes to cause protein synthesis
Acting on genes for DNA replication

A

Acting on genes for DNA replication

4
Q
Which of the following terms means “obvious changes in cell function that result from stimulation by a particular hormone”?
  Up-regulation
  Down-regulation
  Direct effects
  Permissive effects
A

Direct effects

5
Q
Which of the following is NOT a second messenger?
  DAG
  cAMP
  Norepinephrine
  IP3
A

Norepinephrine

6
Q

Which of the following is a TRUE statement regarding the hypothalamus?
It is divided into two nuclei.
It is connected to the anterior pituitary by a single membrane.
It is connected to the posterior pituitary by blood vessels.
The pituitary gland is located in the sella turcica.

A

The pituitary gland is located in the sella turcica.

7
Q
Which of the following is NOT part of the posterior pituitary?
  Median eminence
  Stalk
  Pars distalis
  Infundibular process
A

Pars distalis

8
Q
Which of the following is secreted by the posterior pituitary?
  Oxytocin
  Calcitonin
  Thyroid-stimulating hormone (TSH)
  Parathyroid hormone
A

Oxytocin

9
Q
Which of the following hormones is secreted by the anterior pituitary?
  Androgen
  Prolactin
  Thyroid
  Oxytocin
A

Prolactin

10
Q
Which of the following is NOT found in the thyroid gland?
  C cells
  Follicles
  Isthmus
  Chromophils
A

Chromophils

11
Q

Which of the following is a TRUE statement regarding the parathyroid gland(s)?
There are at least 6 to 10 pairs of glands.
They are large and make up the majority of the thyroid gland.
They produce thyroid hormone.
Parathyroid hormone (PTH) is the most important factor in Ca++ regulation.

A

Parathyroid hormone (PTH is the most important factor in Ca++ regulation

12
Q
Which of the following is NOT one of the three types of hormone-secreting cells in the pancreas?
  Alpha
  Beta
  F
  Delta
A

F

13
Q
A person is diagnosed with diabetes and is unable to produce insulin. Which of the following cells in the pancreas are most likely damaged in this person?
  Beta
  Alpha
  C peptide
  Delta
A

Beta

14
Q

A person has hyperglycemia (increased blood glucose). Which of the following is a TRUE statement regarding glucagon?
It is produced by beta cells.
Hyperglycemia will inhibit glucagon release.
Glucagon decreases blood glucose.
It inhibits lipolysis.

A

Hyperglycemia will inhibit glucagon release

15
Q
Which of the following is NOT an effect of glucocorticoids?
  Metabolic
  Hypertensive
  Anti-inflammatory
  Growth suppression
A

Hypertensive