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What does homeostasis mean?
- The maintenance of the same exact conditions in every cell in a body.
- The maintenance of identical conditions in a cell at all stages in the cell cycle.
- The maintenance of stable conditions in the body for optimal cell functioning.
- The maintenance of identical conditions on the inside and outside of a cell.
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Why would a constant supply of glucose and oxygen be important to a cell?
- To fuel the process of anaerobic respiration, which provides the cell with the maximum amount of energy per glucose.
- To enter metabolic reactions that generate the ATP required to fuel cell activities.
- Metabolism in cells is directly fueled by glucose when oxygen is present.
- ATP is a waste product that must be removed by the cells through the metabolism of glucose and oxygen.
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__________ are endotherms and __________ are ectotherms.
- Fish; humans
- Fish; lizards
- Humans; fish
- Humans; monkeys
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How might a fever of 105ºF affect metabolic reactions in a person’s body?
- It will speed up metabolic reactions, making the use of glucose more efficient.
- It will slow down metabolic reactions, making the use of glucose less efficient.
- Heat denatures the catalysts’ three dimensional structure, which will shut down metabolic reactions.
- Heat denatures the catalysts’ three dimensional structure, speeding up metabolic reactions.
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How would falling though ice affect metabolic reactions in a person’s body?
- There would be no change as the cells would generate their own heat through metabolic
- reactions.
- Very cold temperatures would immediately cause the enzymes to denature and all metabolic reactions to halt.
- Very cold temperatures would significantly speed up the reactions, especially the need for oxygen and ATP.
- Very cold temperatures would significantly slow down the reactions, especially the need for oxygen and ATP.
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Why does Cranwell's horned frog estivate (hibernate) in extremely cold temperatures?
- To find and absorb energy from the ground because it is an ectotherm and the air is too cold
- To find and absorb energy from the ground because it is an endotherm and the air is too cold
- To save energy because it is an ectotherm and its metabolism cannot function in the cold
- To save energy because it is an endotherm and its metabolism cannot function in the cold
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From smallest to largest, which is the correct order of levels of organization of living things?
- Subatomic particles, molecules, organelles, atoms, cells, tissues, organs, organ systems
- Organ systems, organs, tissues, cells, organelles, molecules, atoms, subatomic particles
- Subatomic particles, atoms, molecules, organelles, cells, tissues, organs, organ systems
- Molecules, atoms, subatomic particles, organelles, cells, tissues, organs, organ systems
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Where would a single layer of ciliated, mucous-secreting epithelial cells be found?
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You constantly lose epithelial skin cells, and yet your skin remains intact. This is because:
- The connective tissue cells replace the lost epithelial cells.
- You are born with enough epithelial cells to withstand the continuous loss.
- The epithelial skin cells are constantly replaced through meiosis.
- The epithelial skin cells are constantly replaced through mitosis.
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Bone cells form in circles around a central canal. What is in this central canal?
- Cartilage
- Connective tissue
- A blood vessel
- Adipose
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A structure that is made of more than one kind of tissue is:
- Mutated.
- Damaged.
- An organ.
- Undergoing mitosis.
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What is the largest organ in the body?
- Heart
- Large intestine
- Liver
- Skin
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Why do you get “goose bumps” when you are cold and shiver?
- The skin fills with blood to warm the outer surface, making a bumpy appearance.
- The skin fills with tiny warming air pockets causing the bumpy appearance.
- Adipose collects in pockets under the skin to warm the outer surface, making the hairs stand up on end, causing the bumpy appearance.
- Muscles surrounding skin hairs contract. This generates heat, making the hairs stand up on end, causing the bumpy appearance.
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