MOD 3 - COURSE 1 - PT 2 - tissue

Question 1

definition of tissue

Answer 1

• ensemble of similar cells - carry out specific function

Question 2

what is the study of tissue called?

Answer 2

histology/histopathology

Question 3

what are the 4 groups of animal tissue

Answer 3

• connective
• epithelial
• muscle
• nervous

Question 4

what is the overall function of connective tissue

Answer 4

• gives shape to organs - hold them in place - provides metabolic support for other tissues and organs

Question 5

what are the important components of connective tissue

Answer 5

collagen and elastin

Question 6

what are the 4 types of connective tissue

Answer 6

• dense and loose
• adipose
• cartilage
• bone
• technically blood - for histology studies

Question 7

what is the function of epithelial tissue

Answer 7

• cover organ surface - linked with semiimpermeable junctions - provides barrier between external enviornment and organ
• acts protective - can be specialised

Question 8

3 example sof dapations of epithelial tisue that aids certain function

Answer 8

• keratinised - waterproof and strong i.e. skin
• microvilli - finger like extensions - increase absorptive surface area i.e. small intestines
• ciliated surface - move substance along surface tissu e- one directions i.e. trachea

Question 9

what are msucle cells called

Answer 9

• myocytes

Question 10

what are the 2 types of muscle tissue

Answer 10

• smooth muscle
• striated muscle

Question 11

feature of smooth muscle

Answer 11

• involuntary muscle- not conscious controll
• constant state of readiness
• contractions - wavelength - spread throughout organ

Question 12

where is smooth muscle found

Answer 12

• found in walls of some organs - exhibits involuntarty rythmic and tonic contractions - response to immediate environment

Question 13

where is examples of smooth msucle located

Answer 13

• digestive tract, ducts of glands, blood vessels, uterus, urinary bladder

Question 14

what is striated muscle

Answer 14

• cells organised regularly and repeated arrangements of contractile proteins - myofilaments

Question 15

how can you further calssify striated muscle

Answer 15

• skeletal
• cardiac

Question 16

what is skeletal muscle and whats it function

Answer 16

• voluntary muscle contraction
• anchored by tendons to bone
• effect skeletal movement - maintain posture
  bound by tough connective tissue - fascia

Question 17

what is cardiac - function and features

Answer 17

• involuntary msucle - more akin to structure of skeletal muscle - found only in heart

Question 18

what are the main components of nervous tissue

Answer 18

• CNS (brain adn spinal cord)
• PNS (regulated and controls bodily functions and activity)

Question 19

what does nerve tissue composed off (+function)

Answer 19

• composed of neurons which recieve and transmit impulses and neuroglia

Question 20

what are glia

Answer 20

• assist with propogation of nerve impulses and providing nutrients to neuron

Question 21

what are the functions of nervous syetm

Answer 21

• sensory input
• integration
• control of muscle and glands
• homeostasis
• mental activity