Unit 4 cytology - Lab Assignment PDF

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Lab Assignment...

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Name Section

Date

UNIT

4 REVIEW

Check Your Recall 1

Label the following parts of the cell on Figure 4.13. ❑ ❑ ❑ ❑

❑ ❑ ❑ ❑

Centrioles Chromatin Golgi apparatus Microvillus

❑ Plasma membrane ❑ Rough endoplasmic reticulum ❑ Smooth endoplasmic reticulum

Mitochondrion Nuclear envelope Nuclear pore Nucleolus

Chromatin Nuclear Envelope Nucleolus

Microvillus Centrioles

Nuclear pore

Plasma membrane Rough endoplasmic reticulum

Golgi apparatus

Mitochondrion

Smooth endoplasmic reticulum FIGURE

2

4.13

Generalized cell.

Which of the following is the primary component of the plasma membrane? a. Cholesterol. b. Glycolipids.

c. Phospholipids. d. Integral proteins.

3

What are the three basic components of most cells?

The plasma membrane, the nucleus, and the cytoplasm.

4

Fill in the blanks: Diffusion is the movement of solute from a high concentration to a low concentration. Osmosis is the movement of solvent from a low solute concentration to a high solute concentration. Cytology ❘

UNIT

4 ❙ 10

5

Which of the following factors influences the rate at which diffusion takes place? a. Size of the particles. b. Temperature. c. Steepness of the concentration gradient. d. All of the above.

6

7

Matching: Match the following organelles and cell structures with the correct definitions. __E__ Peroxisome

A. Part of the cytoskeleton located along the plasma membrane

__H__ Smooth ER

B. Produce(s) the bulk of the cell’s ATP

__B__ Mitochondria

C. Contain(s) digestive enzymes

__J__ Ribosomes

D. Stack of flattened sacs that modify and sort proteins

__F__ Rough ER

E. Vesicular organelle that detoxifies substances, metabolizes fatty acids, and synthesizes phospholipids

__A__ Actin filaments

F. Series of membrane-enclosed sacs with ribosomes on the surface

__I__

G. Cytoskeletal filament found in cilia and flagella

Nucleolus

__C__ Lysosome

H. Series of membrane-enclosed sacs that detoxify substances and synthesize lipids

__G__ Microtubule

I. The cell’s “ribosome factory”

__D__ Golgi apparatus

J. Granular organelles that are the sites of protein synthesis

How do isotonic, hypertonic, and hypotonic solutions differ?

An isotonic solution has the same osmotic concentration as the cytosol of a cell placed within it and causes no water movement by osmosis; a hypertonic solution’s osmotic concentration is higher than the cytosol and draws water out of the cell by osmosis; and a hypotonic solution’s osmotic concentration is lower than the cytosol and causes water to move into the cell by osmosis.

8

What happens during the S phase of the cell cycle? a. The cell divides. b. The cell undergoes its final preparation for division. c. The cell undergoes its initial growth phase. d. The cell replicates its DNA.

Cytology ❘

UNIT

4 ❙ 11

9

Label the stages of mitosis and the cell cycle on Figure 4.14.

Anaphase

Prophase FIGURE

10

4.14

Telophase

Interphase

Metaphase

Cells in different stages of the cell cycle.

The mitotic spindle fibers are composed of

a. b. c. d.

microtubules. microvilli. intermediate filaments. actin filaments.

Cytology ❘

UNIT

4 ❙ 12...