chap 4 tissues, organ systems, homeostasis

Question 1

4 major tissue types:

Answer 1

Epithelial, connective, muscle, nervous

Question 2

Epithelial:

Answer 2

Protects body surfaces.

Question 3

Connective:

Answer 3

Supports and binds organs.

Question 4

Muscle:

Answer 4

Moves body parts.

Question 5

Nervous:

Answer 5

Transmits electrical signals.

Question 6

Connective tissue components:

Answer 6

Cells, fibers, ground substance

Question 7

Ground substance:

Answer 7

Gel-like material in connective tissue, supports cells and fibers.

Question 8

Fibers in connective tissue:

Answer 8

collagen, reticular, elastic

Question 9

Collagen:

Answer 9

Strong fibers found in tendons.

Question 10

Reticular:

Answer 10

Network fibers found in lymphoid organs.

Question 11

Elastic:

Answer 11

Stretchable fibers found in skin and lungs.

Question 12

Loose tissue

Answer 12

In organs, provides flexibility.

Question 13

Dense tissue

Answer 13

In tendons/ligaments, provides strength.

Question 14

Cartilage healing:

Answer 14

Slow due to limited blood supply

Question 15

Types of cartilage:

Answer 15

hyaline, elastic, fibrocartilage

Question 16

Hyaline:

Answer 16

Found in joints.

Question 17

Elastic:

Answer 17

Found in ears.

Question 18

Fibrocartilage:

Answer 18

Found in intervertebral discs.

Question 19

Bone rigidity:

Answer 19

Caused by mineral salts around collagen fibers.

Question 20

Bone tissue types:

Answer 20

compact and spongy

Question 21

Compact:

Answer 21

Dense, forms outer layer.

Question 22

Spongy:

Answer 22

Lighter, found in ends of bones.

Question 23

Blood components:

Answer 23

Plasma, red blood cells, white blood cells, platelets.

Question 24

Lymph function:

Answer 24

Transports immune cells and waste.

Question 25

Muscle tissue types:

Answer 25

skeletal, cardiac, smooth (organs)

Question 26

Cardiac muscle disks:

Answer 26

Allow synchronized heart contractions.

Question 27

Neuron functions:

Answer 27

Sensory input, integration, motor output.

Question 28

Neuron parts:

Answer 28

Dendrites: Receive signals. Cell body: Processes signals. Axon: Sends signals.

Question 29

Neuroglia:

Answer 29

Support and nourish neurons.

Question 30

Epithelial tissue:

Answer 30

Covers body surfaces, forms glands.

Question 31

Integumentary system:

Answer 31

Protects, regulates temperature.

Question 32

Subcutaneous layer:

Answer 32

Below skin, not considered part of the skin.

Question 33

Keratinocytes:

Answer 33

Skin cells found in the epidermis.

Question 34

Melanocytes:

Answer 34

Skin cells producing melanin, protect against UV.

Question 35

Accessory organs:

Answer 35

Nails, hair

Question 36

Gland types:

Answer 36

endocrine and exocrine

Question 37

Endocrine:

Answer 37

secretes hormones.

Question 38

Exocrine:

Answer 38

Secretes through ducts (e.g. sweat)