unit 3

1. Match the following chemical terms with their definition:
(Points : 15)
Potential Matches:
1 : Has lost electrons; indicated by a positive sign, as in Na+
2 : Molecule that dissociates in water to form individual ions, ionic compound
3 : Substances whose molecules have more than one kind of atom
4 : Positively charged particle in nucleus
5 : Function is to store energy for later use M.
6 : Alkaline
7 : Double sugar made up of two monosaccharide units
8 : A group of atoms bound together in a group
9 : Non-charged particle in nucleus
10 : Chemical systems that absorb excess acids or bases maintaining a relatively stable pH
11 : A pure substance, made up of only one kind of atom
12 : Dissociate to form equal amounts of hydrogen ion and hydroxide ion
13 : Number of protons in the nucleus; determines the type of atom
14 : Opposite of base
15 : When acids and bases mix and form salts Answer : Proton : Neutron : Atomic number : Element : Molecule : Compound : Water molecules : Base : Acid : Neutralization : Buffers : Disaccharide : Carbohydrates : Electrolyte : Positive ion

Question 2.2. Skin

Microscopic View of Skin. Type the number in the empty box that corresponds with the appropriate letter in the diagram.

(Points : 15)
Potential Matches:
1 : a
2 : f
3 : b
4 : e
5 : g
6 : k
7 : m
8 : c
9 : j
10 : o
11 : h
12 : n
13 : d
14 : i
15 : l
16 : p Answer : Epidermis : dermis : subcutaneous fatty tissue/hypodermis : sweat gland : arrector pili muscle : Pacinian corpuscle : cutaneous nerve : papilla of hair : hair follicle : sebaceous oil gland : Meissner's corpuscle : dermal papilla : stratum germinativum : stratum corneum : hair shaft : openings of sweat glands

Question 3.3. Cell

General Characteristics of a Cell. Type