Answer the following statements true (T) or false (F)
1. Ion pumps are specialized protein structures in the cell membrane.
2. Ion pumps increase the efficiency of transport of material across the cell membrane because each pump can transport a number of different substances.
3. In the DNA molecule, the fact that adenine always pairs with thymine is an example of complementary base pairing.
4. Transcription occurs at the ribosome.
5. Translation occurs at the ribosome.
1. TRUE
2. FALSE
3. TRUE
4. FALSE
5. TRUE
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The tough layer of waterproof material that makes up the outermost part of the epidermis is the stratum lucidum.
Answer the following statement true (T) or false (F)
A continuous, smooth contraction of muscle in which twitches are fully fused is referred to as _________
Fill in the blank with correct word.
Which of the following would slow down gas exchange between the blood and alveolar air?
A. An increase in membrane thickness B. An increase in alveolar surface area C. An increase in respiratory rate D. A decrease in membrane thickness E. A decrease in nitrogen solubility
Which of the following is not true of the larynx?
A. The thyrohyoid ligament connects the hyoid bone to the larynx. B. The glottis consists of the vocal folds and the opening between them. C. The vestibular folds are the only vocal cords that produce sound. D. All of the air that enters the lungs must go through the larynx first. E. All of these are true of the larynx.