Predict which type of channel is associated with ion transport in stereocilia
A. stretch-gated channel
B. ligand-gated channel
C. voltage-gated channel
D. stretch-gated channel and voltage-gated
channel
A
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Substances that can readily pass through the cell membrane are chemically ________ in nature.
Fill in the blank(s) with the appropriate word(s).
A friend asks you how exocrine glands differ from endocrine glands. She knows that both form from invaginated epithelium. How do you respond?
A. The liver is an endocrine gland that secretes directly into epithelial tissues. The pituitary gland is an exocrine gland that secretes into the blood stream. B. Exocrine glands produce hormones that enter the blood stream, while endocrine glands secrete sweat and oil directly to the surface of the skin. C. Exocrine and endocrine glands are essentially the same, both produce products that are secreted to the skin's surface. D. Exocrine glands are found in the thoracic cavity while endocrine glands are located in the pleural cavity. E. Endocrine glands produce hormones that enter the blood stream, while exocrine glands secrete sweat and oil directly to the surface of the skin.
Four of the five answers listed below are related by a common tissue type. Select the exception
a. adipose b. bone c. cartilage d. blood e. epithelium
Which of the following expresses an accurate difference between prokaryotic and eukaryotic cells?
A) Prokaryotes have organelles, but eukaryotes do not. B) Prokaryotic cells are larger than eukaryotes. C) Prokaryotes can be multicellular, but eukaryotes cannot. D) Eukaryotes have a nucleus, but prokaryotes do not.