Histology could be defined as a study of: |
c. tissues |
Normal body temperature is _______ degrees centigrade. |
c. 37 |
The purpose of negative feedback is: |
b. to regulate To maintain homeostatsis |
The heart lies in the _________ cavity. |
c. ventral pericardial |
A structure that is composed of two or more tissues would be: |
c. an organ |
Which statement is not true concerning characteristics of life? |
c. each organ system is isolated from all other body systems |
The single most abundant chemical substances of the body, accounting for 60-80% of body weight is: |
d. water |
Which of the following statements is true concerning feedback mechanisms? |
b. negative feedback mechanisms work to prevent sudden severe changes within the body |
A good example of a positive feedback mechanism would be: |
d. enhancement of labor contracting by oxytocin |
The parietal pleural would be represent a serous membrane: |
c. lining the thoracic cavity |
Choose the anatomical topic and definition that is not correctly matched. |
d. Cytology: study of structures in a particular region |
Homeostasis is the condition in which the body maintains: |
d. a relatively stable internal environment, within limits |
Choose the following statement that is not completely correct regarding serous membranes: |
c. visceral pericardium covers the surface of the heart, and parietal pericardium lines the walls of the heart. |
Place the following in correct sequence from simplest to most complex: a. 2-1-3-4-5 |
b. 2. atoms 1. molecules 4. cells 3. tissues 5. organs |
Which of the following are true functional characteristics of human or other complex life forms? |
b. the digestive system breaks down food to simple molecules for distribution to all body cells |
Which of the following statements is most correct of homeostatic imbalance? |
d. it is considered the cause of most diseases |
Subdivisions of anatomy include: |
d. gross, regional, systemic, and surface |
Select the statement that is most correct. |
c. The immune system is closely associated with the lymphatic system. |
One of the functional characteristics of life is irritability. This refers to: |
b. sensing changes in the environment and then reacting or responding to them |
The pancreas and liver work together to maintain homeostasis through: |
a. negative feedback |
Which of the following is necessary for proper conduction of nervous impulses? |
c. Na |
In general, the category of lipids that we refer to as oils have: |
b. a high degree of unsaturated bonds |
The genetic information is coded in DNA by: |
a. the sequence of the nucleotides |
Carbohydrates are stored in the liver and muscles in the form of: |
d. glycogen |
The speed or rate of a chemical reaction is influenced by all of the following except: |
b. the presence or absence of carbon |
Carbohydrates and proteins are built up from their basic building blocks by the: |
c. removal of a water molecule between each two units |
The differences between mixtures and compounds include: |
b. components forming a mixture can be separated by physical means |
Which of the following is necessary for proper conduction of nervous impulses? A) Fe |
D) Na |
A phospholipid is usually ________. A) partially polar and partially nonpolar |
A) partially polar and partially nonpolar |
In general, the category of lipids that we refer to as oils have ________. A) a high water content |
D) a high degree of unsaturated bonds |
The genetic information is coded in DNA by ________. A) the regular alteration of sugar and phosphate molecules B) the sequence of the nucleotides C) the three-dimensional structure of the double helix D) the arrangement of the histones |
B) the sequence of the nucleotides |
Which of the following is not true of proteins? A) They may be denatured or coagulated by heat or acidity. B) Some types are called enzymes. C) They appear to be the molecular carriers of the coded hereditary information. D) Their function depends on the three-dimensional shape. |
C) They appear to be the molecular carriers of the coded hereditary information. |
The single most abundant protein in the body is ________. A) DNA |
C) collagen |
Carbohydrates are stored in the liver and muscles in the form of ________. A) glucose |
C) glycogen |
Coenzymes are ________. A) organic molecules derived from vitamins |
A) organic molecules derived from vitamins |
The speed or rate of a chemical reaction is influenced by all of the following except ________. A) the concentration of the reactants |
D) the presence or absence of carbon |
A chemical reaction in which bonds are broken is usually associated with ________. A) the release of energy |
A) the release of energy |
Salts are always ________. A) ionic compounds |
A) ionic compounds |
The numbers listed represent the first, second, and third energy levels, respectively. On this basis, which of the following is an unstable or reactive atom? A) 2, 8, 8 |
D) 2, 8, 1 |
A solution that has a pH of 2 could best be described as being ________. A) acidic |
A) acidic |
Which of the following is the major positive ion outside cells? A) nitrogen |
D) sodium |
Which of the following would be regarded as an organic molecule? A) H2O |
D) CH4 |
A chain of 25 amino acids would be called a ________. A) polypeptide |
A) polypeptide |
A long chain of simple sugars would be a ________. A) monosaccharide |
B) polysaccharide |
The coiling of the protein chain backbone into an alpha helix is referred to as the ________. A) primary structure |
B) secondary structure |
Carbohydrates and proteins are built up from their basic building blocks by the ________. A) addition of a water molecule between each two units B) addition of a carbon atom between each two units C) removal of a water molecule between each two units D) removal of a nitrogen atom between each two units |
C) removal of a water molecule between each two units |
Which statement about enzymes is false? A) Enzymes raise the activation energy needed to start a reaction. B) Enzymes are composed mostly of protein. C) Enzymes are organic catalysts. D) Enzymes may be damaged by high temperature. |
A) Enzymes raise the activation energy needed to start a reaction. |
Many plasma proteins may function as _________. A) antibodies |
C) buffers |
Which of the following is true regarding the concentration of solutions? A) Percent solutions are parts per 1000 parts. B) Molarity is one mole of solute per 1000 ml of solution. C) To calculate molarity, one must know the atomic number of the solute. D) To calculate molarity, one must know the atomic weight of the solvent. |
B) Molarity is one mole of solute per 1000 ml of solution. |
Select the statement about mixtures that is correct. A) A solution contains solvent in large amounts and solute in smaller quantities. B) Solutions contain particles that settle out in time. C) Suspensions can change reversibly from liquid to solid. D) Suspensions are homogeneous mixtures of two or more components. |
A) A solution contains solvent in large amounts and solute in smaller quantities. |
HCO3- is _________. A) a bicarbonate ion |
A) a bicarbonate ion |
Select which reactions will usually be irreversible regarding chemical equilibrium in living A) glucose to CO2 & H2O |
A) glucose to CO2 & H2O |