Which type of cells form new cells with specialized functions?
When does differentiation begin in a human embryo?
The body determines whether certain genes should be expressed or not. Sometimes genes are only turned on once or twice in a lifetime. Which example best illustrates this point?
Fill in the blank below with the word that best completes the sentence. ⇒ Genes, Gene, gene, genes determine how cells are differentiated.
Genes, Gene, gene, genes
Stem cells found in adult tissue, such as in the bone marrow, brain, muscle, skin, and liver, are only capable of .
self-renewal
Where can cells that are able to differentiate be found?
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For each sentence below, select the name of the specialized cells being described.Red blood cellsWhite blood cellsMuscle cells✔ NeuronsEpithelial cells are specialized cells that generate and conduct electrical impulses throughout the body.
Red blood cells✔ White blood cellsMuscle cellsNeuronsEpithelial cells are the components of blood that help protect against pathogens and aid in blood clotting.
Red blood cellsWhite blood cellsMuscle cellsNeurons✔ Epithelial cells are specialized cells that transport, protect, absorb, secrete, and provide sensory signals.
✔ Red blood cellsWhite blood cellsMuscle cellsNeuronsEpithelial cells are the components of blood that carry oxygen throughout the body.
Red blood cellsWhite blood cells✔ Muscle cellsNeuronsEpithelial cells are elongated cells that have the ability to contract.
Complete each sentence below by selecting the type of muscle cell that performs the function described.Skeletal muscle cellsSmooth muscle cells✔ Cardiac muscle cells are used to help the heart beat and pump blood.
Skeletal muscle cells✔ Smooth muscle cellsCardiac muscle cells are used in the digestion of food.
✔ Skeletal muscle cellsSmooth muscle cellsCardiac muscle cells are involved in movements of the skeleton (bones).
When conditions change and cells are not in balance anymore, what has been disrupted?
Several bodily responses are described below. For each response, determine what caused the change in homeostasis. need for waterlack of oxygen✔ change in temperaturebody starts to sweatneed for water✔ lack of oxygenchange in temperaturebreathing rate increases✔ need for waterlack of oxygenchange in temperatureamount of saliva produced changesneed for waterlack of oxygen✔ change in temperaturebody starts to shiver
Scientists studying the same hypothesis about cancer have gotten the same result even though they have examined the hypothesis using different procedures. What could be said about the subject they are studying?
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