Biology exam 1

1.

1 point

Physiology is

the study of developmental changes of the body before birth

the study of internal structures as they relate to the skin surface

the study of the operation or function of structures or systems

the study of the structure of body parts and their relationships to one another

2.

1 point

Choose the anatomical topic and definition that is not correctly matched

embryology: the study of the changes in an individual from conception to birth

microscopic anatomy: study of structures too small to be seen by the naked eye

gross anatomy: study of structures visible to the eye

cytology: the study of tissues

3.

1 point

the study of large body structures visible to the naked eye is called:

microscopic

developmental

systemic

gross

4.

1 point

Histology is defined as the study of:

cells

cell chemistry

tissues

the gross structures of the body

5.

1 point

Place the following in correct sequence from simplest to most complex:

1.molecules
2.organ
3.atoms
4.tissues
5.cells

12345

21345

31542

32415

6.

1 point

One of the necessary life functions is responsiveness or irritability. This refers to:

the necessity for all organisms to reproduce

indigestible food residues stimulating the excretory system

the nervous system causing all living things to sometimes experience anger

sensing changes in the environment and then reacting or responding to them

7.

1 point

Which of the following would not be a necessary life function?

maintaining boundaries

movement

normal body temperature

responsiveness

8.

1 point

Survival needs of the body include

nurtrients, water, growth, and reproduction

water, atmospheric pressure, growth, and movement

nutrients, water, atmospheric pressure, and oxygen

nutrients, water, movement, and reproduction

9.

1 point

The ability to maintain a relatively stable internal environment is called?

positive feedback

homeostasis

homeostatic imbalance

metabolism

10.

1 point

which of the following statements is true concerning feedback systems

in positive feedback systems, the output shuts off the original stimulus

blood glucose levels and body temperature are regulated by negative feedback mechanisms

positive feedback mechanisms always result in excessive damage to the host

in negative feedback systems, the output enhances or exaggerates the original stimulus

11.

1 point

an example of a positive feedback mechanism would be:

regulating glucose levels in the blood

body temperature regulation

a disease caused by homeostatic imbalance

regulation of blood clotting

12.

1 point

a control mechanism in which the output of the system enhances the effect of the original stimulus is a:

homeostatic imbalance

negative feedback system

neutral feedback system

positive feedback system

13.

1 point

which of the following statements is correct of homeostatic imbalance

the internal environment is becoming more stable

it is considered the cause of most disease

feedback mechanisms maintain equilibrium

negative feedback mechanisms take over

14.

1 point

The organ system that is composed of the skin, glands, hair, and nails is the

skeletal system

lymphatic system

cardiovascular system

integumentary system

15.

1 point

The atomic number of an element is

equal to the number of protons and neutrons in the nucleus

equal to the number of protons in the nucleus

equal to the average mass of all isotopes of an element

equal to the number of neutrons in the nucleus

16.

1 point

if an atom of an element has 14 protons, 10 neutrons, and 14 electrons, what is its mass number?

10

24

14

28

17.

1 point

If an atom of an element has an atomic number of 8 and a mass number of 20, how many electrons does it have?

28

8

12

20

18.

1 point

The atomic weight of an element is equal to

the weight of the protons in an atom of an element

the average of the mass numbers of all isotopes of an element

the weight of one atom of one isotope of an element

the mass of the protons and neutrons in the nucleus

19.

1 point

Isotopes of the same element have the same

number of neutrons but different numbers of electrons

number of protons but different numbers of neutrons

mass number

number of neutrons but different numbers of protons

20.

1 point

the four elements that make up about 96% of body mass are:

carbon, oxygen, hydrogen, nitrogen

carbon, oxygen, phosphorous, calcium

nitrogen, hydrogen, calcium, sodium

sodium, potassium, hydrogen, oxygen

21.

1 point

select the statement about mixtures that is correct

solutions contain particles that settle out in time

suspensions are homogenous mixtures of two or more components

colloids are homogenous mixtures

a solution contains solvent in large amounts and solute in smaller quantities

22.

1 point

which of the following is true regarding the concentration of solutions

percent solutions are parts solvent per 1000 parts total

one mole of an element is equal to its atomic number

molarity is the number of moles of solute per liter of solution

molarity is the number of moles per 100 mole total

23.

1 point

elements that have their valence shell fully occupied by electrons are

hyperactive elements

electronegative elements

inert (non-reactive) elements

reactive elements

24.

1 point

atoms with 6 or 7 valence shell electrons are

electroneutral

inert

electropositive

electronegative

25.

1 point

select the statement that is correct regarding chemical bonds

ionic bonds involve the sharing of electrons between 2 atoms

covalent bonding involves the transfer of one or more electrons from one atom to another

multiple bonds are not possible with covalent bonding

covalent bonds involve the sharing of electrons forming a chemical bond

26.

1 point

which of the following is true of hydrogen bonds

h bonds form between 2 electronegative atoms on different molecules

h bonds are strong bonds formed by the sharing of electrons between atoms forming a bond

h bonds can also form intramolecular bonds

h bonds involve the transfer of an electron to an electropositive atom

27.

1 point

a chemical reaction involving bond formation forming larger molecules

is a decomposition reaction

involves the addition of a water molecule

always involves the release of energy

is a synthesis reaction

28.

1 point

which of the following is true of endergonic reactions

the products of endergonic reactions contain more potential energy than the reactants

the reactants in endergonic reactions contain more potential energy than the products

endergonic reactions involve the release of energy from the reaction

endergonic reactions are electron acceptors and are thus oxidized

29.

1 point

in a redox reactions, the reactant that gains electrons is said to have been

reduced

cationized

compromised

oxidized

30.

1 point

a reaction that involves the forming of a chemical bond with the loss of a molecule of water is called a ____ reaction

decomposition

dehydration synthesis

hydrolysis

vaporization

31.

1 point

Which of the following is not an important characteristic of water

nonpolar solvent properties

high heat of vaporization

high heat capacity

reactivity

32.

1 point

which of the following is an organic molecule

Na2SO4

NaOH

C6H12O6

H2O

33.

1 point

Salts are:

single covalent compounds

hydrogen bonded

double covalent compounds

ionic compounds

34.

1 point

An acid is a compound which:

removes or accepts protons

releases or donates protons

releases OH- into solution

raises the pH of a solution

35.

1 point

A solution that has a pH of 3 is described as being

acidic

alkaline

neutral

basic

36.

1 point

Buffers are systems that

release hydroxyl ions into solution in response to rising pH

resist abrupt or large changes in pH

always donate protons and lower the pH

form H2O and a salt, neutralizing solution

37.

1 point

Glucose, sucrose, and glycogen are all 3 examples of

disaccharides

polysaccharides

monosaccharides

carbohydrates

38.

1 point

A long chain or polymer of simple sugars would be called a

protein

polypeptide

polysaccharide

monosaccaride

39.

1 point

A phospholipid is composed of

3 fatty acids and glycerol

2 fatty acids and glycerol

2 fatty acids, glycerol, and a phosphorous-containing group

3 fatty acids, glycerol, and a phosphorous-containing group

40.

1 point

Cholesterol is an example of a:

steroid

eicosanoid

neutral fat

phospholipid

41.

1 point

the coiling of the primary structure of a protein into an alpha helix or beta pleated sheet is referred to as

primary structure

secondary structure

tertiary structure

quaternary structure

42.

1 point

fibrous proteins:

are spherical molecules that exhibit tertiary and quaternary structure

include examples as antibodies and enzymes

are also called structural proteins

are also called functional proteins

43.

1 point

which statement about enzymes is false

a holoenzyme is composed of an apoenzyme and a cofactor

enzymes raise the activation energy needed to start a reaction

enzymes are biological catalysts

enzymes and other proteins may be denatured by high temperature

44.

1 point

which of the following would not be part of a DNA nucleotide

thymine

guanine

cytrosine

uracil

45.

1 point

the structural unit of nucleic acids is the

nucleotide

saccharide

peptide

glyceride