When worn-out red blood cells are destroyed, the hemoglobin is degraded to a yellow pigment known as ____________________, which is excreted into the bile
Fill in the blank(s) with correct word
bilirubin
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Myelin
A. is released from a neuron and travels to another neuron. B. is produced in response to bacterial infection. C. is a form of chromatophilic substance that fills Schwann cells. D. consists of layers of lipids and proteins that wrap around an axon.
This receptor responds to acetylcholine from both sympathetic and parasympathetic preganglionic fibers:
a. muscarinic b. alpha c. beta d. nicotinic
Describe the simplest type of unicellular exocrine gland
A) Simple alveolar (acinar) gland; this is found during embryonic development and not in adults. B) Simple tubular gland; this gland has a single duct that does not divide at the straight glandular cells. C) Simple coiled tubular gland; this has a single duct but a coiled secretory area. D) Goblet cell; this cell is scattered among absorptive cells in the intestines. E) Simple holocrine cell; this cell will burst to release its secretions.
Although severing a peripheral axon leads to some degeneration, the neurilemma remains largely intact
Indicate whether this statement is true or false.