BIO 212 Exam 1 Study Guide Questions and
Answers 100% Solved
How does the exchange of materials relative to surface area-to-volume ratio influence the size of
organisms in different environments? An organism that needs constant exchange of water
in a dry environment will have a smaller SA:V ratio than an animal who can maintain their water
intake manually.
Identify three adaptations found in animals for increasing surface area. Flattened
(laminae), branching (capillaries), and folding (villi)
Compare strategies for increasing surface area between plants, animals, bacteria, protists, and
fungi. Bacteria= flattened bacteria cells compared to circular
Animals= folding, flattening, and branching of blood supply and intenstines
Protists= small, flattened, cytoplasmic extensions
Fungi= branching networks of extremely thing hyphae
Plants= leaves and roots increase SA:V
Explain how sensor, integrator, and effector work together in negative feedback control of
homeostasis. 1. Stimulus changes variable.
, BIO 212 Exam 1 Study Guide Questions and
Answers 100% Solved
2. Change is detected through receptor.
3. Input into sent from sensor to integrator.
4. Output info sent on efferent pathway to effector.
5. Response of effector returns variable back to homeostasis.
Define convection, conduction, radiation, evaporation. Convection=transfer of heat
through direct contact
Conduction= transfer of heat through a fluid by molecular motion
Radiation= energy radiated through rays, waves, or particles
What are the advantages and disadvantages of endothermy vs ectothermy? Endotherms
maintain constant temp and can live in colder climates but need more food to maintain energy
output.
Ectotherms use less food for temp maintenance but are less active in cooler temps.
Define homeotherm and poikilotherm. Homeotherm= an organism that maintains its body
temp at a constant level normally above the environment by metabolic activity.
Answers 100% Solved
How does the exchange of materials relative to surface area-to-volume ratio influence the size of
organisms in different environments? An organism that needs constant exchange of water
in a dry environment will have a smaller SA:V ratio than an animal who can maintain their water
intake manually.
Identify three adaptations found in animals for increasing surface area. Flattened
(laminae), branching (capillaries), and folding (villi)
Compare strategies for increasing surface area between plants, animals, bacteria, protists, and
fungi. Bacteria= flattened bacteria cells compared to circular
Animals= folding, flattening, and branching of blood supply and intenstines
Protists= small, flattened, cytoplasmic extensions
Fungi= branching networks of extremely thing hyphae
Plants= leaves and roots increase SA:V
Explain how sensor, integrator, and effector work together in negative feedback control of
homeostasis. 1. Stimulus changes variable.
, BIO 212 Exam 1 Study Guide Questions and
Answers 100% Solved
2. Change is detected through receptor.
3. Input into sent from sensor to integrator.
4. Output info sent on efferent pathway to effector.
5. Response of effector returns variable back to homeostasis.
Define convection, conduction, radiation, evaporation. Convection=transfer of heat
through direct contact
Conduction= transfer of heat through a fluid by molecular motion
Radiation= energy radiated through rays, waves, or particles
What are the advantages and disadvantages of endothermy vs ectothermy? Endotherms
maintain constant temp and can live in colder climates but need more food to maintain energy
output.
Ectotherms use less food for temp maintenance but are less active in cooler temps.
Define homeotherm and poikilotherm. Homeotherm= an organism that maintains its body
temp at a constant level normally above the environment by metabolic activity.
