Chapter 4: Biology of the Cell Flashcards Preview

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Flashcards in Chapter 4: Biology of the Cell Deck (310)
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1

What are the functions of Rough ER?

Production of proteins
Formation of transport vehicles
Storage of proteins to be exported from the cell

2

Which of the following describe the general functions of the cell. Choose all that apply.

Dispose of wastes
Maintain shape of the cell
Obtain nutrients

3

Sodium diffusion into the cells occurs _____ to the loss of K+.

before

4

Cells usually die by one of the two mechanisms: chemical/mechanical damage or _____.

apoptosis

5

The two types of organelles found in cells are _____ and _______.

membrane bound
non-membrane bound

6

Both Na+ and K+ are pumped by the Na/K pumps _______ their concentration gradients in maintaining the resting membrane potential.

up

7

Old or worn out organelles in a cell are removed by what organelle?

lysosomes

8

_____ junctions allow small solutes to travel between adjacent cells.

Gap

9

Where might you find tight junctions in the body?

urinary bladder
small intestine

10

The replication of the DNA molecule during Interphase occurs during the ______ phase.

S Phase
or synthesis

11

Peroxisomes break down harmful substances including:

hydrogen peroxide
alcohol
fatty acid molecules

12

Also called intracellular fluid

cytosol

13

It contains many solutes, proteins and carbohydrates.

cytosol

14

Cytosol has a high ____ content.

water

15

A codon can code for:

an anticodon of mRNA

16

True or False:
Peroxisomes are usually smaller in diameter than lysosomes.

True

17

Bulk transport refers to the movement of macromolecules across a selectively permeable membrane are two categories of bulk transport mechanisms, _____ and ______.

endocytosis
exocytosis

18

DNA double helix wound around a cluster of histones

Nucleosome

19

finely filamented mass of DNA and protein

chromatin

20

become visible only when the cell is dividing

chromosomes

21

Internally, cilia and flagella contain cytoplasym and ______. They are enclosed in the plasma membrane.

microtubules

22

the study of cells

cytology

23

the use of a microscope to view small-scale structures

microscopy

24

produces a two dimensional image by passing visible light through the specimen.

light microscope (LM)

25

a beam of electrons to "illuminate" the specimen - high resolution

electron microscope (EM)

26

directs and electron beam through a thin-cut section of the specimen resulting in a 2 dimensional image focused onto a screen for viewing or onto photographic film.

TEM or transmission electron microscope

27

For detailed three-dimensional study of a specimen's surface

scanning electron microscope (SEM)

28

the electron beam is moved across the surface of the specimen, and reflected electrons generate a surface-topography image captured on a television screen.

scanning electron microscope (SEM)

29

Most cells are microscopic in size, but some are large enough to be seen with the _____.

naked eye

30

the shape of red blood cells

bioconcave disc