ZOOL 320 - CH 20 Word Scramble
|
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Question | Answer |
example of altricial young | tree swallow |
example of precocial young | snowy plover |
eyes open, covered with feathers or down, leave nest after one or two days. | precocial |
eyes closed, little or no down, unable to leave nest, fed by parents: passerines | altricial |
covered with down, unable to leave nest, fed by parents | semialtricial |
eyes open, covered with down, able to walk but remain at nest are fed by parents: gulls, terns | semiprecocial |
Greater amount of yolk in eggs, yolk remaining at hatching, size of eyes and brain, and development of muscles | precocial |
greater size of gut and rate of growth after hatching | altricial |
characteristics of siblicidal birds: | competition for food food provisioned in small packets weaponry competitive disparities spatial confinement |
occurs when there is potential for uneven consumption of parental resources. | sibling competition |
killing a brother or a sister may be a common adaptive strategy among nestling birds, benefiting both the surviving offspring and the parents. | avian sublicide |
In Spring the birds orient toward the | North |
In Autumn the birds orient toward the | South |
migratory restlessness | zugunruhe |
Migrating birds orient by | postion of Sun polarized light Earth's magnetic field infrasound |
How songs influence male bird. | identifies their species, sex, and occupancy of a territory. |
usually the longest and most complex vocalization produced by a bird | song |
short, simple, stereotyped bird songs | territorial songs |
long, complex, variable bird songs | sexual songs |
birds are unique among sauropsids in having | one-way flow of air through the lungs |
avian air sac system: | infraorbital sinus clavicular air sac axillary diverticulum into humerus sternal diverticulum cervical air sac cranial thoracic air sac caudal thoracic air sac abdominal air sac lung(only left side is shown) |
leads to abdominal air sac | mesobronchus |
dorsobronchus and ventrobronchus are connected by this within lungs | parabronchus |
Air route is from bronchus to mesobronchus to abdominal air sac to | dorsobronchus through parabronchi to ventrobronchus |
breath of air stays in system for two complete cycles. new breath occurs with each inspiration. results in continuous one-way flow of air through the lungs | two-cycle ventilation in birds |
into lungs during ( ) out of lungs during ( ) | expiration inspiration |
occurs in each air capillary because gases in air capillary continuously encounter new supply of deoxygenated blood | countercurrent |
occurs because there is less oxygen in the distal air capillaries | cross current |
produced by ventral movement of sternum by contraction of intercostal muscles, and pulling up of ilium by contraction of longissimus dorsi | inspiration |
produced by relaxation of intercostal muscles, contraction of suprapubic and infrapubic abdominal muscles which pull the pelvis and tail downward | expiration |
furcula and coracoid spread and restore during | wingbeat |
sternum moves up and down during | wingbeat |
furcula spreads to inflate clavicular air sac, sternum elevates to compress posterior air sacs (anterior air sacs expanded, posterior collapsed) | wing depressed |
furcula collapses medially and sternum descends (posterior air sacs expanded, anterior collapsed) | upstroke |
Anatomic dead air space is that in which air is only pumped back and forth, about 30% in humans. Birds have about this amount | much less |
Created by:
dominatrix
Popular Science sets