Biological clocks

What is an circadian rhythm?

• Biological rhythm which lasts around 24 hrs

• Biological rhythm which is under 24 hrs

• Biological rhythm which lasts longer than 24 hrs

The correct term for when biological rhythms are matched to environmental triggers

• Entertainment

• Endogenous pacemaker

• Exogenous zetgerbers

• Entrainment

What is the definition of a biological rhythm?

• When you play the drums while thinking about science

• Distinct patterns of changes in body activity that conform to cyclical time periods

• The sleep/wake cycle

• An internal response to a change in your environment

The sleep wake cycle is an example of?

• Circadian Rhythm
• Exogenous Zeitgeber
• Ultradian Rhythm 
• Infradian Rhythm 

a diurnal animal is ..

• active during hours of darkness

• Active during hours of light

• no pattern to activity

• active during dawn and dusk

the combination of the earth orbiting the sun and tilt of the earths axis gives

• tidal rhythm

• semi lunar rhythm

• annual rhythm

• compound rhythm

when a rhythm continues in constant environmental conditions it is said to be

• free-running

• entrained

• exogenous

• circadian

Supra-chiasmatic nuclei (SCN) is..

• the center of the biological clock in mammals

• part of the hypothalamus

• the center of the biological clock in birds

• a zeitgeber that effect the nerves

the period of a tidal rhythm is

• 24 hours

• 15 days

• 12.4 hours

• 28 days

an endogenous rhythm is

• driven by external stimuli

• is internal driven

• requires a internal clock

• stops occurring in constant conditions