Plants Unit Flashcards Preview

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Flashcards in Plants Unit Deck (22):
0

Parenchyma

Make & store organic products
Give rise to new cells

1

Collenchyma cells

Flexible support for young, non-weedy parts of plant shoot (w/o restraining growth)

2

Sclerenchyma cells

Rigid support
Thickened secondary cell walls
Strengthened by lignin

3

Xylem cells

Vascular plant tissue
Tubular dead cells conducting most of the water & minerals upward from roots to the rest of pt

4

Tracheids

Cells interconnected by pits in cell wall
Long, tapered water-conducting cells
Dead @ maturity & found in xylem of all vascular plants

5

Vessel elements

Hollow tube
Short, wide, water-conducting cell found in xylem of most angiosperms & few nonflowering nonvasculars
Vessels aligned end to end, forming micropipes called vessels

6

Dermal tissue system

Cover and protect
Secretes cuticle leaves and stem

7

Vascular tissue system

Xylem and phloem
transport

8

Ground tissue system

Photosynthesis, support, transport

9

Primary growth of plants

Elongation

10

Secondary growth of plants

Thickening

11

Meristems

Areas of cell division
Plant tissue that remains embryonic as long as the plant live, allowing for indeterminate growth

12

Aquaporin

Membrane channel proteins, water moves through

13

Symplast

Movement through cell membranes and plasmodesmata
Tightly regulated

14

Apoplast

Water moves with crossing a membrane
Unregulated

15

Nitrogen

For chlorophyll, amino acids, enzymes, nucleic acid production

16

Phosphorous

Production of nucleic acids, ATP, phospholipids, etc.

17

Potassium

Enzyme activation, water balance, stomatal openjng

18

Phloem cells are...

Living

19

Sieve-tube members

Chains of cells w/o organelles
Route of nutrient passage

20

Sieve plates

Pores that facilitate flow of liquid from cell to cell along sieve tube

21

Companion cell

Non-conducting cell
May help load sugars