Tissues and Cell Structures

Question 1

Simple Pit

Answer 1

Found in primary cell wall. Channels for the transport of water and nutrients between cells. Opens internally to the lumen of the cells. Can also be called the primary pit field. Lack borders.

Question 2

Bordered Pit

Answer 2

Found in secondary cell wall. Usually found in sclerenchyma. Stronger and more complex than simple pit

Question 3

Simple Tissues

Answer 3

Parenchyma
Collenchyma
Sclerenchyma

Question 4

Complex Tissues

Answer 4

A mix of any of these three types of simple tissues
Dermal Tissue system: epidermis/epiderm
Vascular Tissue system: xylem/phloem

Question 5

Parenchyma

Answer 5

only have primary walls that stay thin
the most common type of cell tissue, found in all soft parts of plants: soft leaves, petals, fruits, seeds composed mostly parenchyma
are alive at maturity

Question 6

Chlorenchmya

Answer 6

Subtype of parenchyma. parenchyma cells involved in photosynthesis, contain chloroplasts. Thin walls allow light/CO2 to pass thru to chloroplasts

Question 7

Glandular cells

Answer 7

Subtype of parenchyma. secrete nectar, fragrance, mucilage, resins. Higher amounts of dictyosomes and endoplasmic reticulum. For protection.

Question 8

Transfer cells

Answer 8

Subtype of parenchyma. mediate short distance transport by means of large plasma membranes.

Question 9

Collenchyma

Answer 9

Primary cell walls only
Alternating layers of pectin and cellulose, thicker at corners
Provide support while leaves and stems are expanding
Usually only seen on young petioles and stems
Works together with parenchyma, combining water pressure and resistance

Question 10

Sclerenchyma

Answer 10

Found in secondary walls, derived from parenchyma cells that have stopped growing
Elastic yet retain shape
Dead at maturity

Question 11

Mechanical sclerenchyma

Answer 11

usually have simple pits

• Fibers
• Sclereids

Question 12

Conducting sclerenchmya

Answer 12

usually have bordered pits

• Tracheids
• Vessels