Question 1

Which may be included in melatonin's actions?

Accepted Answer

A)  regulation of circadian rhythms 
B)  having permissive action with glucorticoids 
C)  induction of calcium reabsorption 
D)  stimulation of melanin pigment production

Question 2

Which statement concerning steroids is correct?

Accepted Answer

A)  They are hydrophilic 
B)  They are derived from cholesterol. 
C)  They initiate the synthesis of second messenger system within their target cells. 
D)  Epinephrine is an example.

Question 3

What can too little activity of a particular hormone arise from?

Accepted Answer

A)  an abnormality within the endocrine gland that produces this hormone 
B)  overactivity of this hormone's tropic hormone 
C)  overstimulation by hypothalamus 
D)  ovver stimulation of pituitary gland

Question 4

____________________ are the bone cell types that dissolve bone.

Accepted Answer

The answer of ____________________ are the bone cell types that...

Question 5

All hormones are first formed as preprohormones then are pruned into active hormones.

Accepted Answer

A) True 
 B)False

Question 6

Indicate which of the features apply to the posterior and anterior pituitary by using the answer code (options may be used more than once or not at all).
-neurally connected to the hypothalamus

Accepted Answer

A) applies to the posterior pituitary 
B) applies to the anterior pituitary 
C) applies to both the posterior and anterior pituitary

Question 7

Indicate which of the features apply to the posterior and anterior pituitary by using the answer code (options may be used more than once or not at all).
-composed of nervous tissue

Accepted Answer

A) applies to the posterior pituitary 
B) applies to the anterior pituitary 
C) applies to both the posterior and anterior pituitary

Question 8

Which class of hormones acts by means of a second-messenger system?

Accepted Answer

A)  proteins 
B)  catecholamines 
C)  steroids 
D)  thyroid hormone

Question 9

Indicate which of the features apply to the posterior and anterior pituitary by using the answer code (options may be used more than once or not at all).
-secretes MSHs in humans

Accepted Answer

A) applies to the posterior pituitary 
B) applies to the anterior pituitary 
C) applies to both the posterior and anterior pituitary

Question 10

The same chemical messenger may be either a hormone or a neurotransmitter,depending on its source and mode of delivery to the target tissue.

Accepted Answer

A) True 
 B)False

Question 11

How does growth hormone exert its effects on growth?

Accepted Answer

A)  by stimulating production of somatomedins 
B)  by directly invoking gene activity 
C)  by elevating blood glucose levels 
D)  by increasing fat metabolism

Question 12

Peptide hormones are often produced as prohormones.

Accepted Answer

A) True 
 B)False

Question 13

With regards to circadian rhythms,which statement is true?

Accepted Answer

A)  The hypothalamus's supraoptic nucleus maintains them. 
B)  Melanin is responsible for generating them. 
C)  They are brought about by fluctuating levels of clock proteins. 
D)  The pituitary gland maintains them.

Question 14

A tropic hormone acts primarily on nonendocrine tissues.

Accepted Answer

A) True 
 B)False

Question 15

Each steroidogenic organ is capable of producing all of the steroid hormones.

Accepted Answer

A) True 
 B)False

Question 16

Negative-feedback control tends to maintain hormone levels at a relatively constant set point,whereas neuroendocrine reflexes usually produce a sudden increase in hormone secretion in response to a specific stimulus.

Accepted Answer

A) True 
 B)False

Question 17

Indicate which characteristics apply to the hormones below by using the answer code.
-synthesized within colloid

Accepted Answer

A) steroids 
B) catecholamines 
C) peptides 
D) thyroid hormone

Question 18

Which statement concerning growth hormone is correct?

Accepted Answer

A)  It directly stimulates bone growth. 
B)  It affects bones via somatomedin release. 
C)  It promotes closure of the epiphyseal plate. 
D)  It promotes low blood glucose level

Question 19

Most hormone secretion is regulated by some form of ____________________ feedback.

Accepted Answer

The answer of Most hormone secretion is regulated by some...

Question 20

Which statement concerning diurnal rhythms is correct?

Accepted Answer

A)  They are inherent cyclical peaks and ebbs of hormone secretion that are a function of time and are entrained to the 24-hour light-dark cycle. 
B)  They are important in maintaining hormone levels at a relatively constant set point, no matter the time of day. 
C)  They occur only with cortisol secretion. 
D)  They occur only with growth hormone secretion.

Exam 5: Principals of Endocrinology; The Central Endocrine Glands

Which may be included in melatonin's actions?

Which statement concerning steroids is correct?

What can too little activity of a particular hormone arise from?

____________________ are the bone cell types that dissolve bone.

All hormones are first formed as preprohormones then are pruned into active hormones.

Indicate which of the features apply to the posterior and anterior pituitary by using the answer code (options may be used more than once or not at all) . -neurally connected to the hypothalamus

Indicate which of the features apply to the posterior and anterior pituitary by using the answer code (options may be used more than once or not at all) . -composed of nervous tissue

Which class of hormones acts by means of a second-messenger system?

Indicate which of the features apply to the posterior and anterior pituitary by using the answer code (options may be used more than once or not at all) . -secretes MSHs in humans

The same chemical messenger may be either a hormone or a neurotransmitter,depending on its source and mode of delivery to the target tissue.

How does growth hormone exert its effects on growth?

Peptide hormones are often produced as prohormones.

With regards to circadian rhythms,which statement is true?

A tropic hormone acts primarily on nonendocrine tissues.

Each steroidogenic organ is capable of producing all of the steroid hormones.

Negative-feedback control tends to maintain hormone levels at a relatively constant set point,whereas neuroendocrine reflexes usually produce a sudden increase in hormone secretion in response to a specific stimulus.

Indicate which characteristics apply to the hormones below by using the answer code. -synthesized within colloid

Which statement concerning growth hormone is correct?

Most hormone secretion is regulated by some form of ____________________ feedback.

Which statement concerning diurnal rhythms is correct?