Ch.2 Cell Structure and more

Question 1

What is a function of the plasma membrane (envelopes entire cell.)

Answer 1

Provides a barrier for the cell; regulates movement of materials in and out of cell.

Question 2

What are desmosomes?

Answer 2

intercellular junctions that provide strong adhesion between cells.

Question 3

Cell junctions providing a channel allowing chemical substances to pass between cells are

Answer 3

gap junctions.

Question 4

Cell junctions providing an impermeable junction encircling the cell, which inhibits movement between cells, are

Answer 4

tight junctions

Question 5

Which is NOT a primary function of cell plasma membranes?

Answer 5

energy storage

Question 6

Organelles are found in the

Answer 6

cytoplasm

Question 7

Which would be diploid? - human eggs, neurons, or sperm

Answer 7

neurons

Question 8

Which would NOT have chromosomes in pairs?
zygote
sperm
liver cells
neurons

Answer 8

sperm

Question 9

Chromosomes go from consisting of one to two chromatids per chromosome during

Answer 9

interphase

Question 10

what are the primary functions of the plasma membrane?

Answer 10

• physical boundary
• transporter of molecules and ions
• signal transduction
• enzymatic activity

Question 11

From the 9th week of pregnancy until birth, the developing human is called a(n) ____.

Answer 11

fetus

Question 12

What are the phases of the cell cycle?

Answer 12

G 1 : Cell growth

S : DNA replication

G 2: Preparation for mitosis

M : Cell Division - Prophase, metaphase, anaphase, telophase - cytokinesis ( not part of cell division)

Question 13

The first major event of organogenesis is called___

Answer 13

neurulation

Question 14

The early blastocyst cells that eventually form the placenta are called ______.

Answer 14

trophoblast

Question 15

Derivatives of the mesoderm include

Question 16

A single layer of tall and narrow cells lining your intestines comprises

Answer 16

simple columnar epithelium.

Question 17

Which tissue provides strength while allowing compression? This tissue is found in your intervertebral disks, holding your vertebrae together but allowing compression when you jump up and down.

Answer 17

fibrocartilage

Question 18

An exocrine gland that accumulates its secretion in a cell’s cytoplasm, with the cell bursting to release the secretion, is a

Answer 18

merocrine

Question 19

Which type of glands produce perspiration on the soles of your feet when your shoes keep your feet too warm?

Answer 19

eccrine sweat glands

Question 20

Cleavage as part of embryonic development is distinctive because it involves

Answer 20

cell division by mitosis with little or no growth between successive divisions.