Compare the external and internal body environments
What will be an ideal response?
Basic cell functions include: obtaining food and oxygen, extracting energy from nutrients, eliminating wastes, protein synthesis, controlling exchange between cells and the surrounding environment, internal cellular movement, being able to respond to changes in the surrounding environment, and reproducing.
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The organelles that are flattened sacs that chemically process molecules are the:
a. endoplasmic reticulum b. flagella c. Golgi apparatus d. lysosome
In skeletal muscle and many other cell types, mitochondria exist separately
a. True b. False Indicate whether the statement is true or false
The refractory period of cardiac muscle
a. lasts almost as long as the contraction period. b. is much longer than the refractory period in skeletal muscle. c. allows tetanic contraction of the heart to occur to ensure smooth, coordinated ejection of blood from the ventricles. d. both (a) and (b) above. e. all of these answers.
What is the name of the process that re-isomerizes the all-trans retinal back to the 11-cis form?
A. Dark adaptation B. Dark current C. Bleaching reaction D. Visual cycle of retinal