A first-order neuron is
A) the sensory neuron that brings information from the receptor to the CNS.
B) one that projects the motor homunculus to the parietal lobe of the cerebellum.
C) the first neuron in any pathway.
D) a neuron that extends down the spinal cord.
E) None of the answers are correct.
A) the sensory neuron that brings information from the receptor to the CNS.
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The portion of the nasal cavity contained within the flexible tissues of the external nose is the
A) nasopharynx. B) vestibule. C) internal chamber. D) conchae. E) nasal septum.
Answer the following statements true (T) or false (F)
1 Flat sheets of collagen that attach muscle to one another are called tendons. 2 Intercalated discs are found in all muscles tissue types. 3 Long, cylindrical, multinucleate cells are characteristic of skeletal muscle cells. 4 Smooth muscles is typically found on the walls of hollow organs.
In order to accommodate the large liver,
A. the right kidney is about 2 centimeters inferior to the left kidney. B. the left kidney is about 2 centimeters inferior to the right kidney.
In adult humans, most cancers are carcinomas or adenocarcinomas. These include cancers of the skin, lung, colon, breast, and prostate. Which of the four basic tissue types is involved, and why?
a. Connective tissue: it is found everywhere in the body, and is the only tissue common to the skin, lungs, colon, breasts, and prostate. b. Epithelial tissue: it is exposed to the environment and is constantly dividing, both factors allowing more opportunity for damage and overcoming growth control mechanisms. c. Epithelial tissue: it is avascular and composed entirely of cells, both of which inhibit surveillance by the immune system. d. Connective tissue: cancerous cells can move more freely and spread to other tissues more easily due to the high level of vascularization in connective tissue. Connective tissue: cancerous cells require high levels of nutrients, and connective tissue is well vascularized.