There are some neurotransmitters, such as acetylcholine, that are used extensively throughout the nervous system. Yet a single type of neurotransmitter can have multiple effects. How is this possible?
What will be an ideal response?
Answer: For neurotransmitters to generate their effects in other cells, they must bind to a receptor. It is possible for a neurotransmitter to bind to a variety of receptors which are typically made up of multiple protein subunits. Each of these subunits may have several isoforms. As a result, there are many combinations of neurotransmitter/receptor bindings, each of which can generate its own unique response in the cell.
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On the basis of structural classification, which is a fibrous joint?
A) pivot B) syndesmosis C) symphysis D) synchondrosis
Which statement about membrane proteins is incorrect?
a. Channels are water-filled pathways. b. Channels are not highly selective. c. Carriers are highly selective. d. CAMs serve as binding sites for specific ions. e. Proteins may work in conjunction with carbohydrates to provide recognition of "self."
A student's dietary intake includes 100 grams of fat and a total of 2000 kilocalories. What percentage of the total kilocalories in this student's diet comes from fat?
A. 50% B. 45% C. 20% D. 37% E. 10%
Glands that have branched ducts and secretory cells that form sacs at one end of the ducts are classified as ________ glands.
A. compound acinar B. areolar C. compound tubuloacinar D. simple acinar E. simple coiled tubular