Exam 3: Swimming, respiration, scope for activity

Question 1

Oxygen consumption

Answer 1

Body size

temp

activity
- more activity = more oxygen

Question 2

respirometer

Answer 2

measures fish metabolic rate

Question 2

Respiration

Answer 2

Respiration supplies the oxygen needed to produce energy in cellular respiration

Question 3

scope for activity

Answer 3

length between active rate and resting rate

Question 4

Lactic acid

Answer 4

Gas gland secretes acid and CO2 for Bohr and Root effects

reduces pH

Question 5

Co- Current exchange

Answer 5

Flow of water and blood at the gills
less efficiency

water and blood both flowing to the right

Oxygen enters the blood in fish

Question 6

Counter current exchange

Answer 6

Flow of water and blood at the gills

Bohr and Root effects

Higher efficiency

common physiological mechanism

Gillia

Muscle

Gas bladder

Water and blood are parallel goind neg down graph

Tube shape water is top right (flowing right ) and bottom left is blood flowing left

Question 7

Afferent

Answer 7

going to (gas bladder)

goes counter-current at gas bladder and maximises gas transfer

Question 8

Efferent

Answer 8

going from/away (gad bladder)

goes counter-current at gas bladder and maximises gas transfer

Question 9

Primary lamellae

Answer 9

2 rows of gill filaments per branchial arch

Question 10

secondary lamellae

Answer 10

Think of tree
branches coming off of trunk is secondary lamellae

trunk is primary

Question 11

upper lethal temp

Answer 11

Temps at which death occurs when water temperature is raised rapidly

Question 12

diffusion gradient

Answer 12

Blood flows in the opposite direction to the water that flows over the fish’s gills