Which of the following do carrier proteins often transport?
a. proteins
b. steroid hormones
c. H2O
d. glucose and amino acids
Ans: d. glucose and amino acids
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Also known as the Adam's apple, the cartilage is the largest piece of cartilage in the larynx.
Which of the following statements concerning glial cells is true?
a. Astrocytes are phagocytic cells that remove debris in the central nervous system. b. Schwann cells form sheaths around neurons within the central nervous system. c. Oligodendrocytes regulate the concentration of neurotransmitters in neurons. d. Microglia are involved in the neurological disease multiple sclerosis. e. Ependymal cells help produce and circulate cerebrospinal fluid.
The phase change of an apical meristem from the juvenile to the mature vegetative phase is often revealed by _____
A) a change in the morphology of the leaves produced B) the initiation of secondary growth C) a change in the orientation of preprophase bands and cytoplasmic microtubules in lateral meristems D) the activation of floral meristem identity genes
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Figure 36.6
Use the figure above to answer the following question.
The anatomical structure identified with the letter "D" in the accompanying figure is the ____.
A. myocardium B. pulmonary veins C. inferior vena cava D. right atrium E. heart apex