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Types of Biological Rhythms: Circadian, Circalunar, and Circannual

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Types of Biological Rhythms: Circadian, Circalunar, and Circannual

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Questions and Answers

What is the primary function of a zeitgeber?

To synchronize an organism's behavior with the environment

To regulate an organism's internal clock (correct)

To alter an organism's circadian rhythm

To generate an organism's endogenous rhythm

Which brain area is responsible for serving as the master internal clock?

Cerebral cortex

Medulla oblongata

Cerebellum

Hypothalamus (correct)

What is the primary advantage of biological rhythms?

Increased energy expenditure

Increased lifespan

Enhanced cognitive function

Improved coordination with the environment (correct)

Which type of biological rhythm is approximately monthly?

Circalunar Signup and view all the answers

What is the term for the daily biological rhythm?

Circadian Signup and view all the answers

Where is the master internal clock, the suprachiasmatic nucleus (SCN), located in the brain?

Above the optic chiasm in the hypothalamus Signup and view all the answers

What is the role of the Clock/Cycle_BMAL dimer in the molecular clock?

It promotes the transcription of the PER and CRY genes Signup and view all the answers

How does light entrain the molecular clock in the SCN?

Through the transmission of signals from retinal ganglion cells Signup and view all the answers

What is the role of melatonin in determining the time of year in animals?

It measures day and night length Signup and view all the answers

How can hormones indirectly affect the SCN?

By modulating the activity of neurons that communicate with the SCN Signup and view all the answers