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| Question | Answer |
|---|---|
| cellular communication occurs by means of... | nerve signals and hormones |
| another name for enzyme | catalyst |
| function of enzymes | influence the rate of reactions (speeds reactions up) |
| why will a certain enzyme digest egg white but not starch | enzymes are specific in their action bc they work by shape |
| 2 examples of carbs | sugar and starch |
| organic compound made of 3 fatty acids and glycerol | lipid |
| what process makes enzymes | protein synthesis |
| how do hormones and enzymes work | by specific shape |
| gas that is a waste product of autotrophic nutrition | oxygen |
| structure responsible for maintaining homeostasis in all cells | cell membrane |
| why do we need to digest proteins, fats and carbs | so they are soluble in our blood and can pass easily thru cell membrane |
| what 2 items does a plant have to use for photosynthesis | carbon dioxide and oxygen |
| what part of a neuron secretes neurotransmitters | end of the axon (recognize it in a diagram) |
| substances found on cell surfaces that respond to nerve and hormone signals | receptors |
| to remain healthy, all the life functions must occur, and they all require | energy from ATP |
| what does respiration synthesize | ATP |
| electrochemical message that produces a response | impulse |
| junctions btwn neurons | synapses (recognize in a diagram) |
| why are nerve cells necessary for an animal | provide communication btwn cells |
| why does a plant bend toward light | light affects the distribution of auxins |
| what substances regulate metamorphosis | hormones |
| which system transports hormones from endocrine glands | circulatory |
| when blood sugars rises, insulin is secreted, blood sugar drops, and insulin secretion is decreased, it is an ex of... | feedback mechanism |
| how do white blood cells respond to pathogens | identify invaders, produce antibodies, engulf and destroy |
| function of perspiration | regulate body temp |
| what are allergies | immune responses to usually harmless substances |
| know diagram of antibodies, white blood cells, pathogens with antigens | draw it. |
| reduces sugar level of blood | insulin |
| similarity btwn nervous and endocrine systems | both maintain homeostasis |
| which system involves a gland secreting a chemical that is transported in the blood to an organ or tissue and causes a change | endocrine |
| neurons are to neurotransmitters as endocrine glands are to what | hormones |
| what are feedback mechanisms | processes that keep body in homeostasis |
| why do hormones attach to target cells and not other cells | target cells have the proper shape receptors |
| identify white blood cell in diagram | largest cell with strange shape nucleus |
| name 3 organ systems and describe how they maintain homeostasis | nervous and endocrine - communicate inside body to react to changes, skin - maintain body temp, excretory - get rid of wastes, etc... |