Question 1

Which region of the mammalian brain is viewed as the master clock that organizes all circadian rhythms?

Accepted Answer

A)  Suprachiasmatic nucleus (SCN) 
B)  Hippocampus 
C)  Pineal gland 
D)  Preoptic area (PO
A)  of the hypothalamus 
A)  Suprachiasmatic nucleus (SCN) 
B)  Hippocampus 
C)  Pineal gland 
D)  Preoptic area (PO
A)  of the hypothalamus

Question 2

Which of the following act as negative feedback elements in a cell's circadian loop?

Accepted Answer

A)  CRY-PER 
B)  CLOCK-PER 
C)  CK1-BMAL 
D)  CLOCK-BMAL1 
A)  CRY-PER 
B)  CLOCK-PER 
C)  CK1-BMAL 
D)  CLOCK-BMAL1

Question 3

Serotonin is converted to melatonin

Accepted Answer

A)  by the adrenal glands. 
B)  in the POA. 
C)  by the enzyme tryptophan. 
D)  by the pineal gland. 
A)  by the adrenal glands. 
B)  in the POA. 
C)  by the enzyme tryptophan. 
D)  by the pineal gland.

Question 4

A male and female rat each has free-running circadian rhythms shorter than the normal 24 hours. Their offspring will most likely have a

Accepted Answer

A)  shorter cycle (less than 24 hours) as well, indicating that circadian rhythms have a strong genetic component. 
B)  normal cycle (24 hours), indicating that zeitgebers have the strongest influence on cycle length. 
C)  longer cycle (greater than 24 hours), indicating that circadian rhythms have a strong genetic component. 
D)  longer cycle (greater than 24 hours), indicating that zeitgebers have the strongest influence on cycle length. 
A)  shorter cycle (less than 24 hours) as well, indicating that circadian rhythms have a strong genetic component. 
B)  normal cycle (24 hours), indicating that zeitgebers have the strongest influence on cycle length. 
C)  longer cycle (greater than 24 hours), indicating that circadian rhythms have a strong genetic component. 
D)  longer cycle (greater than 24 hours), indicating that zeitgebers have the strongest influence on cycle length.

Question 5

Melatonin is produced in the

Accepted Answer

A)  testes. 
B)  parathyroid gland. 
C)  renal tubule. 
D)  pineal gland. 
E)  pituitary. 
A)  testes. 
B)  parathyroid gland. 
C)  renal tubule. 
D)  pineal gland. 
E)  pituitary.

Question 6

Reproductive photorefractoriness in Syrian hamsters is best characterized by

Accepted Answer

A)  the spontaneous regression of the hamsters' testes. 
B)  long day typical behavior but short day typical physiology. 
C)  arrhythmic activity rhythms. 
D)  the spontaneous re-activation of the reproductive system. 
A)  the spontaneous regression of the hamsters' testes. 
B)  long day typical behavior but short day typical physiology. 
C)  arrhythmic activity rhythms. 
D)  the spontaneous re-activation of the reproductive system.

Question 7

Explain the concept of photorefractoriness and provide an example of when it may occur in nature.

Accepted Answer

Photorefractoriness is a phenomenon in w

Question 8

Infradian rhythms refer to those rhythms with a period

Accepted Answer

A)  of 24 hours. 
B)  that is less than 24 hours. 
C)  that is more than 24 hours. 
D)  of one year. 
A)  of 24 hours. 
B)  that is less than 24 hours. 
C)  that is more than 24 hours. 
D)  of one year.

Question 9

Photoperiodism is the

Accepted Answer

A)  ability of light to entrain circadian rhythms. 
B)  ability to use day length to time annual cycles. 
C)  stimulation of the pineal gland of birds by light reflecting through the skull. 
D)  ability of light to entrain ultradian rhythms. 
A)  ability of light to entrain circadian rhythms. 
B)  ability to use day length to time annual cycles. 
C)  stimulation of the pineal gland of birds by light reflecting through the skull. 
D)  ability of light to entrain ultradian rhythms.

Which region of the mammalian brain is viewed as the master clock that organizes all circadian rhythms?

Which of the following act as negative feedback elements in a cell's circadian loop?

Serotonin is converted to melatonin

A male and female rat each has free-running circadian rhythms shorter than the normal 24 hours. Their offspring will most likely have a

Melatonin is produced in the

Reproductive photorefractoriness in Syrian hamsters is best characterized by

Explain the concept of photorefractoriness and provide an example of when it may occur in nature.

Infradian rhythms refer to those rhythms with a period

Photoperiodism is the

The Study of Behavioral Endocrinology

The Endocrine System

Sex Differences in Behavior: Sex Determination and Differentiation

Sex Differences in Behavior: Animal Models and Humans

Male Reproductive Behavior

Female Reproductive Behavior

Parental Behavior

Hormones and Social Behavior

Homeostasis and Behavior

Stress

Learning and Memory

Hormones and Affective Disorders

Filters

Exam 10: Biological Rhythms

Which region of the mammalian brain is viewed as the master clock that organizes all circadian rhythms?

Which of the following act as negative feedback elements in a cell's circadian loop?

Serotonin is converted to melatonin

A male and female rat each has free-running circadian rhythms shorter than the normal 24 hours. Their offspring will most likely have a

Melatonin is produced in the

Reproductive photorefractoriness in Syrian hamsters is best characterized by

Explain the concept of photorefractoriness and provide an example of when it may occur in nature.

Infradian rhythms refer to those rhythms with a period

Photoperiodism is the

The Study of Behavioral Endocrinology

The Endocrine System

Sex Differences in Behavior: Sex Determination and Differentiation

Sex Differences in Behavior: Animal Models and Humans

Male Reproductive Behavior

Female Reproductive Behavior

Parental Behavior

Hormones and Social Behavior

Homeostasis and Behavior

Stress

Learning and Memory

Hormones and Affective Disorders

Filters