What is the benefit of having some of the cellular organelles enclosed by a membrane similar to the cell (plasma) membrane?
What will be an ideal response?
The isolation of the internal contents of membrane-bound organelles allows them to manufacture or store secretions, enzymes, or toxins that could adversely affect the cytoplasm in general. Another benefit is the increased efficiency of having specialized enzyme systems concentrated in one place, for example, those necessary for energy production in the mitochondrion. In addition, the membranes themselves serve as "workspace," allowing the anchoring of enzymes or other proteins into a stabilized location.
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Matching
A) Direct phosphorylation B) Anaerobic pathway C) Aerobic pathway 33) Marathons. 34) 25 meter swim. 35) Weight lifting.
Which muscle(s) is (are) contracted to exhale forcibly?
A) diaphragm alone B) external intercostals and diaphragm C) internal intercostals and rectus abdominus D) rectus abdominis and diaphragm
The point during an action potential when the inside of the cell has become more positive than the outside is known as the
A) falling phase. B) rising phase. C) depolarization. D) peak. E) overshoot.
All of the following could be learned from a blood chemistry test except
A. blood urea nitrogen. B. elevated glucose levels. C. elevated cholesterol levels. D. heart rate and blood pressure. E. bilirubin levels.