Answer the following questions true (T) or false (F)
1. The most up-to-date explanation of the structure of the plasma membrane is called the fluid-mosaic model.
2. Water moves freely through a semipermeable membrane.
3. Osmosis is an example of passive transport.
1. TRUE
2. TRUE
3. TRUE
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During neuronal signaling, a change in membrane potential will cause sodium channels to open and let Na+ ions diffuse down their concentration gradient into the cell. Which of the following helps establish the concentration gradient necessary for this process to occur?
A. Na+/K+ channel B. voltage-gated Na+ channel C. Na+ symporter D. Na+/K+ pump
Which of the following statements regarding CAM plants is true?
A) Stomata are open during the day. B) Malate is stored in large vacuoles. C) CO2 is transported directly into mesophyll cells. D) They assimilate 25% less CO2 than C3 plants. E) both choices B and C
A viral capsid is composed of subunits called:
a. Envelopes b. Nucleic Acids c. RNA d. Coats e. Capsomeres, which are in turn made of protomers
A layer of smooth muscle in the wall of this tiny air-conducting tube allows it to regulate its diameter
A) Larynx B) Pharynx C) Alveolus D) Bronchiole E) Trachea