Regeneration in invertebrates

Question 1

Types of regeneration

Answer 1

1. Compensatory growth
2. Regeneration of lost or damaged part
3. Body remodels into new organism

Question 2

Compensatory growth def

Answer 2

Proliferation of existing tissue (mammalian liver)

Question 3

Regeneration of lost/ damaged part def

Answer 3

Regrowing a limb

Question 4

Body remodels into new organism def

Answer 4

(No def) Hydra

Question 5

Porifera regeneration steps

Answer 5

1. Wound repair
2. Radialization
3. Restoration

Question 6

Platyhelminthes regeneration steps

Answer 6

1. Neoblasts (triggers)
2. Wound repair
3. Blastema
4. Regeneration

Question 7

Cnidarians regeneration steps

Answer 7

1.Wound repair
2. Dedifferentiation (go back to losing function)
3. Blastema
4. Regeneration

Question 8

Echinodermata regeneration steps

Answer 8

1. Wound repair
2. Dedifferentiation
3. Blastema
4. Regeneration

Question 9

Arthropoda regeneration steps

Answer 9

1. Wound repair
2. Molt
3. Regeneration

Question 10

Mollusca regeneration steps

Answer 10

1. Wound repair
2. Blastema
3. Regeneration

Question 11

Annelida regeneration steps

Answer 11

1. Constriction
2. Wound repair
3. Blastema
4. Regeneration

Question 12

Benefits of autonomy

Answer 12

• Increased survival
• Sublethal predation
• Removal of toxins
• Asexual reproduction

Question 13

At what cost?

Answer 13

• Regeneration can be energetically expensive
• Cost of injury
• Fidelity cost

Question 14

Regeneration can be energetically expensive

Answer 14

• Enhance resource allocation to somatic functions
• Decreased resources to sexual reproduction

Question 15

Asexual reproduction types

Answer 15

1. Fission (Division)
2. Fragmentation (piece off)
3. Budding (buds off of another piece)

Question 16

Factors influencing regeneration

Answer 16

(Anything that affects post embryonic development!)
1. Temp
2. Nutrition
3. Salinity
4. pH
5. Level of activity