The Four Basic Tissues

Question 1

4 basic tissue types

Answer 1

Epithelia
Muscle
Nervous
Connective

Question 2

Muscle

Answer 2

Tissues that contract
Voluntary and involuntary
Functions: contractility, movement, stature, pressures

Question 3

3 kinds of muscle

Answer 3

Skeletal
Smooth
Cardiac

Question 4

Skeletal muscle

Answer 4

Voluntary
Elongated cells
Large cells
Multi-nucleated (at periphery)
Packed full of contractile proteins (actin and myosin)

Question 5

Cardiac muscle

Answer 5

Centrally placed nucleus
Branching fibers
Intercalated discs

Question 6

Intercalated discs (function)

Answer 6

Anchorage
Conduction (have gap junctions to make a functional syncytium)

Question 7

Smooth muscle

Answer 7

Small cells
1 central nucleus
Not easy to distinguish cell borders

Question 8

Structure of a peripheral nerve

Answer 8

Composed of bundles of nerve fibers (fascicles)

Each fascicle is a mix of efferent and afferent nerves

Question 9

2 types of epithelium

Answer 9

Lining

Glandular

Question 10

Lining epithelium

Answer 10

Covers or lines all body surfaces, cavities, and tubes

Question 11

Glandular epithelium

Answer 11

Forms functional units of glands

Question 12

General functions of epithelium

Answer 12

Protection
Dehydration
Absorption
Secretion

Question 13

3 components of connective tissue

Answer 13

Cells

ECM (ground substance and fibers)

Question 14

3 types of CT

Answer 14

Loose
Dense irregular
Dense regular

Question 15

Where does collagen live?

Answer 15

Extracellularly

It is made by the fibroblasts, but then released and assembled outside of the cells

Question 16

Pacinian corpuscles

Answer 16

Pressure/touch/vibration receptors
Composed of a central nerve ending that is surrounding by lamellae
Pushing down displaces the fluid in the lamellae and transmits a signal