The level of organization when different primary tissues are combined together and work together to perform a common function is called the _______ level.
A.) cellular
B.) tissue
C.) organ
D.) chemical
E.) organismal
Ans: C.) organ
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At the ________ stage during erythropoiesis the cell has lost all organelles except some ribosomes, but it continues to produce hemoglobin.
Fill in the blank(s) with the appropriate word(s).
What structure do RBCs move through single-file?
A) artery B) arteriole C) capillary D) venule E) vein
What type of neuron, found within the CNS, performs the job of information processing?
A) bipolar neurons B) interneurons (association neurons) C) motor (efferent) neurons D) sensory (afferent) neurons
Movements of the body are usually smooth and occur at differing rates because
A. they are a mixture of isotonic and isometric contractions. B. motor units contract out of phase at their own particular rates. C. most muscle contractions closely resemble individual muscle twitches. D. muscles of different sizes contract at different rates. E. of the all or none principle.