ch. 4 tissues; nervous and muscular

Question 1

nervous tissues are a main component

Answer 1

of the nervous system

Question 2

nervous tissue contains two types of cells

Answer 2

neurons: high specialized cells which generate and conduct impulses.
neuroglia: supporting cells-provide nutrition, insulation, and protection

Question 3

3 types of muscle tissue

Answer 3

skeletal muscle
smooth muscle
cardiac

Question 4

skeletal muscle:

Answer 4

function: pull on bones to generate movements-under voluntary control
location: in skeletal muscles attacked to bones
-has striations

Question 5

smooth muscle

Answer 5

function: propels substances - involuntary
location: walls of hollow organs
-no striations

Question 6

cardiac muscle

Answer 6

function: propels blood to circulation, involuntary
location: walls of the heart.
-junctions: desmosomes, intercalated discs

Question 7

association between the 4 tissues

Answer 7

-epithelium always rests upon or is supported by connective tissue
-peripheral nerves are surrounded by or embedded within connective tissue
-muscle tissue is enmeshed by connective tissue
-blood vessels travel within connective tissue

Question 8

glandular organs:

Answer 8

salivary glands, pancreas, lacrimal gland, liver, kidneys- not hollow
-pack a large number of epithelial cells into a small volume
-allow a large number of secretive epithelial cells to function, without being exposed to the outside environment
-glandular epithelia cells are generally well protected by surrounding tissues
-supported by underlyung CT

Question 9

tubular organs

Answer 9

oral cavity, esophagus, stomach, small intestine, large intestine, rectum, and anal canal, nasal passages, trachea, ureters, bladder, urethra, fallopian tubes, uterus, vas deferens, vessels of the circ system
-hollow
-has smooth muscle in the walls

Question 10

tubular vs glandular organs

Answer 10

in both: epithelium rests upon connective tissue
tubular plan: epithelium forms the internal lining of the organ
glandular plan: the bulk of secretion portion of the organ is epithelium- entire gland is epithelium

Question 11

membrane

Answer 11

layer of epithelium and CT brought together by a basement membrane
function: cover and line the surfaces outside and inside the body

Question 12

3 types of membranes

Answer 12

cutaneous
mucus
serous

Question 13

3 types of membranes
cutaneous

Answer 13

skin, a dry membrane

Question 14

3 types of membranes
mucous

Answer 14

line the internal surface of every hollow organ that opens to the outside of the body
-location: nasal cavity, oral cavity

Question 15

3 types of membranes
serous

Answer 15

slippery membranes that line closed cavities inside the body (pleural, pericardial, peritoneal cavities)- wet, line cavities that are closed to the outside env.
-two layers: parietal (line body wall) and visceral (closest to the surface of an organ)