Histology

Question 1

cell

Answer 1

the basic unit of an organism, maintain life and processes, produce substances and interact with other cells

Question 2

tissues

Answer 2

organized groups of cells and their products, over 200 types of cells, 4 types of tissues

Question 3

organ

Answer 3

self contained, vital function

Question 4

epithelium

Answer 4

lines pretty much everything, consists of lots of cells put together, specialized to interact with the environment it contacts, (cells attached by specialized structures at the top) supported by underlying tissues, over turn rapidly, produce products such as hair, mucus, sweat, oil

Question 5

connective

Answer 5

sparce cells surrounded in cell products, (bone and cartilage, tendons and ligaments, fat and fascia blood)

Question 6

nervous tissue

Answer 6

neurons, and supporting cells; groups of axons look white (because of myelin), groups of cell bodies look gray, peripheral “nerves” are clusters of axons

Question 7

central (nerve tissue)

Answer 7

brain and spinal chord

Question 8

peripheral (nerve tissue)

Answer 8

spinal nerves and their branches

Question 9

somatic (nerve tissue)

Answer 9

“normal” sensory and motor nerves

Question 10

autonomic

Answer 10

sympathetic and parasympathetic nervous system

Question 11

muscle tissue

Answer 11

specialized for contraction

Question 12

skeletal (muscle tissue)

Answer 12

occur in muscles which are attached to the by tendons skeleton, striated in appearance and are under voluntary control; born with all you will have, grow when workout

Question 13

smooth (muscle tissue)

Answer 13

located in walls of hollow visceral organs, appear spindle shaped, and are under involuntary control (stomach and intestines), small cells everywhere

Question 14

cardiac (muscle tissue)

Answer 14

located in the walls of the heart, appear striated, and are under involuntary control

Question 15

we can tell in which direction a muscle will shorten by…

Answer 15

looking at the orientation of its fibers

Question 16

what tells more about a muscles actions

Answer 16

where muscles cross a joint

Question 17

amounts of muscle force?

Answer 17

muscles can exert different amounts of force

Question 18

concentric contractions

Answer 18

force from muscle exceeds opposing forces, muscle shortens

Question 19

isometric contractions

Answer 19

force is exerted, force equals the opposing force, muscle length doesn’t change

Question 20

eccentric contractions

Answer 20

muscle producer less force than opposing force, muscle elongated

Question 21

muscles can only perform what movement?

Answer 21

muscle can only contact, if not opposed by another force, it will remain in contraction

Question 22

agonist

Answer 22

“prime mover”

Question 23

antagonist

Answer 23

opposed the prime mover; controls contraction of the agonist, returns the joint to its original position

Question 24

synergist

Answer 24

may produce the same movement as the agonist, may act as a neutralizer

Question 25

motor neuron

Answer 25

activated more than 1 cell by forming a pathway for impulses to pass from the brain or spinal chord to the rest of your body (such as muscle/gland)

Question 26

muscle fiber

Answer 26

they run straight through center of muscles (rod luke shape) made up of myofibfil

Question 27

myofibril

Answer 27

contraction unit; muscle can only pull, never push

Question 28

sacromere

Answer 28

basic unit of muscle contraction, responsible for the striated appearance in muscle fibers

Question 29

crossing a joint

Answer 29

a muscle is capable of acting when it crosses a joint

Question 30

bicep joint crosses

Answer 30

crosses both the shoulder and elbow joints, main function is at elbow where it flexes and supinated the forearm

Question 31

triceps joint crosses

Answer 31

extensor muscle of the elbow joint and an antagonist of the bicep and brachialis muscles, crosses the elbow joint in the back when forearm and hand are used for fine moves