Timing Responses (animals)

Question 1

Nocturnal

Answer 1

Active at night

Question 2

Diurnal

Answer 2

Active during the day

Question 3

Crepuscular

Answer 3

Active at dawn and dusk

Question 4

Activity cycles controlled by a biological (internal) clock

Answer 4

Endogenous rhythms

Question 5

Activity cycles controlled by external environmental cues

Answer 5

Exogenous rhythms

Question 6

Light and dark
Temperature
Length of day

Answer 6

Environmental cues

Question 7

Internal clock being ‘re-set’ by environmental cues

Answer 7

Entrainment

Question 8

What is a zeitgeber? (3 things)

Answer 8

External environmental cue
Cause of entrainment
Can re-set internal clocks

Question 9

Circannual

Answer 9

Endogenous rhythm with a cycle of about 1 year (365 days)

Question 10

Circadian

Answer 10

Endogenous rhythm with a period of about 24 hours (daily)

Question 11

Circatidal

Answer 11

Endogenous rhythm with a period of about 12 hours (half day)

Question 12

Circalunar

Answer 12

Endogenous rhythm with a period of about 30 days (month)

Question 13

Circasemilunar

Answer 13

Endogenous rhythm with a period of about 15 days (half month)

Question 14

All timing responses are…?

Answer 14

Innate (genetically programmed, not learnt)

Question 15

In an actogram when a forward phase shift is shown it is called…?

Answer 15

A phase advance

Question 16

In an actogram when a backwards phase shift is shown it is called…?

Answer 16

A phase delay

Question 17

In an actogram endogenous shows what?

Answer 17

Shows rhythm

Question 18

In an actogram exogenous shows what?

Answer 18

Shows no rhythm