Which type of cells form new cells with specialized functions?
When does differentiation begin in a human embryo?
Fill in the blank below with the word that best completes the sentence. determine how cells are differentiated.
Genes, Gene, gene, genes
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?
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?
For each sentence below, select the name of the specialized cells being described. are specialized cells that generate and conduct electrical impulses throughout the body. are the components of blood that help protect against pathogens and aid in blood clotting. are specialized cells that transport, protect, absorb, secrete, and provide sensory signals. are the components of blood that carry oxygen throughout the body. are elongated cells that have the ability to contract.
are the components of blood that help protect against pathogens and aid in blood clotting.
are specialized cells that transport, protect, absorb, secrete, and provide sensory signals.
are the components of blood that carry oxygen throughout the body.
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. are used to help the heart beat and pump blood. are used in the digestion of food. are involved in movements of the skeleton (bones).
are used in the digestion of food.
are involved in movements of the skeleton (bones).
When conditions change and cells are not in balance anymore, what has been disrupted?
Put the following levels of organization in order from least inclusive (1) to most inclusive (5).tissueorganismorgancellorgan system
Several bodily responses are described below. For each response, determine what caused the change in homeostasis. body starts to sweatbreathing rate increasesamount of saliva produced changesbody 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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