Secretory structures and Intracellular

Question 1

sacs or pouches surrounded by a secretory
epithelium consist of two types: (a) gum cavity; & (b)resin cavity

Answer 1

Intercellular cavities

Question 2

Types of Intercellular cavity

Answer 2

(a) gum cavity; & (b)
resin cavity

Question 3

more or less elongated spaces, surrounded by a secretory epithelium, and being either axial or vertical, radial or horizontal in disposition

Answer 3

Intercellular canals

Question 4

structures containing and producing
latex

Answer 4

Laticifers

Question 5

chains of cells in which the walls separating the cells remain intact, are perforated, or completely dissolved.

Answer 5

Articulated laticiferous tube

Question 6

These structures are often called latex vessels

Answer 6

Articulated laticiferous tube

Question 7

These are originated from single cell, (simple in origin), which through continued growth develop into tube-like often much branched, but typically they undergo no fusion with other similar cells.

Answer 7

Non-articulated laticiferous tube

Question 8

These
types of laticifers are called laticiferous cell

Answer 8

Non-articulated laticiferous tube

Question 9

this term is applied to cells of nearly
normal size, or only somewhat
enlarged, containing oil, resin, or
mucilage

Answer 9

Secretory Cells

Question 10

longitudinally and/or horizontally oriented
openings that are surrounded by cells
secreting resinous, gummy or oily
substance.

Answer 10

Resin ducts; gum and oil ducts

Question 11

may occur as a normal characteristic feature or may arise due to injury.

Answer 11

Resin and gum canals

Question 12

sometimes referred to as resin ducts, are unique to conifers;they are technically not individual cells, but are actually open,

Answer 12

Resin canals,

Question 13

tube-like spaces bordered by special cells that have the ability to secrete pitch or resin into the neighboring opening (canal).

Answer 13

Resin canals,

Question 14

Most Dipterocarp timber species will exhibit resin ducts in ____________ except those seen in Apitong group which are either diffused or in short tangetial series

Answer 14

long tangetial series

Question 15

Resin canals very obvious in __________

Answer 15

Late wood

Question 16

tubular, intercellular spaces of indeterminate length, which serve as repositories for gums or resins, secreted by the epithelium.

Answer 16

Gum canals

Question 17

breakdown or degeneration of cells

Answer 17

Gummosis

Question 18

Normal gum canals are either _______, i.e., longitudinal or horizontal, i.e., _____ in disposition.

Answer 18

axial, radial

Question 19

are a constant feature in all local dipterocarp woods under a trade name “Philippine mahogany.”

Answer 19

Axial gum canals

Question 20

occur as a result of injury or wounding in
woods.

Answer 20

traumatic or pathologic gum canals in
hardwoods

Question 21

are restricted to the longitudinal kind only. They may be formed in three ways: schizogenously, lysigenously, or schizolysigenously.

Answer 21

Traumatic canals,

Question 22

arise in the same manner as normal gum
canals which result from the separation of the cells at the middle lamella.

Answer 22

Schizogenous canals

Question 23

They are provided with excreting parenchymatous tissue surrounding the cavity, known as the epithelium.

Answer 23

Schizogenous canals

Question 24

result from the actual disintegration of cells, are much larger than the schizogenous canals and are devoid of epithelium. An example of this type of canal is the pith fleck, caused by insect damage.

Answer 24

Lysigenous canals

Question 25

the result of both processes. The cavities are formed through cell fission and cell separation at the middle lamella, followed by the enlargement of the cavities through actual disintegration of the cells surrounding them.

Answer 25

Schizolysigenous canals

Question 26

Like the lysigenous canals, they are larger than schizogenous canals.

Answer 26

Schizolysigenous canals

Question 27

This refers to the presence of phloem
(bark) in the xylem (wood). This is a
characteristic feature of the species
Api-api (Avicennia officinalis L.)

Answer 27

included phloem

Question 28

The frequency of pore contents contents, if
present, are described using the relative terms:

Answer 28

sparse, common, and abundant.

Question 29

foam-like or sac-like deposits found in vessels

Answer 29

Tyloses

Question 30

are found in axial parenchyma and ray cells and less frequently in septate fibers in tyloses

Answer 30

Crystals

Question 31

Druce, Raphides Elongated and rod-like
Acicular, Crystal sand Rhomboidal

Answer 31

Types of
crystals

Question 32

globular or star- like in shape; in calcium oxalate they as appear needle- or spear-shaped

Answer 32

DRUSE

Question 33

needle-shaped crystals of calcium
oxalate monohydrate or calcium carbonate as
aragonite, found in more than 200 families of plants

Answer 33

RHAPIDES