Question 1

Lipids

Accepted Answer

A) form essential structural components of cells. 
B) provide a significant energy reserve. 
C) help to maintain body temperature. 
D) cushion organs against shocks. 
E) All of the answers are correct. 
A) form essential structural components of cells. 
B) provide a significant energy reserve. 
C) help to maintain body temperature. 
D) cushion organs against shocks. 
E) All of the answers are correct.

Question 2

The weakest bond between two atoms is the ________ bond.

Accepted Answer

A) ionic 
B) covalent 
C) polar 
D) nonpolar 
E) hydrogen 
A) ionic 
B) covalent 
C) polar 
D) nonpolar 
E) hydrogen

Question 3

Carbohydrates,lipids,and proteins are classified as

Accepted Answer

A) organic molecules. 
B) inorganic molecules. 
C) acids. 
D) salts. 
E) bases. 
A) organic molecules. 
B) inorganic molecules. 
C) acids. 
D) salts. 
E) bases.

Question 4

Atoms of the same element whose nuclei contain the same number of protons,but different numbers of neutrons,are called ________.

Accepted Answer

The answer of Atoms of the same element whose nuclei...

Question 5

Artificial sweeteners

Accepted Answer

A) are naturally similar to sugars. 
B) are always some form of carbohydrate. 
C) are usually not broken down by the body. 
D) are inorganic sugar substitutes. 
E) provide the same number of calories as an equivalent amount of sucrose. 
A) are naturally similar to sugars. 
B) are always some form of carbohydrate. 
C) are usually not broken down by the body. 
D) are inorganic sugar substitutes. 
E) provide the same number of calories as an equivalent amount of sucrose.

Question 6

Which of the following is not a cation?

Accepted Answer

A) Na⁺ 
B) Cl⁻ 
C) K⁺ 
D) Ca²⁺ 
E) Mg²⁺ 
A) Na⁺ 
B) Cl⁻ 
C) K⁺ 
D) Ca²⁺ 
E) Mg²⁺

Question 7

Which property of water helps keeps body temperature stabilized?

Accepted Answer

A) kinetic energy 
B) lubrication 
C) surface tension 
D) reactivity 
E) thermal inertia 
A) kinetic energy 
B) lubrication 
C) surface tension 
D) reactivity 
E) thermal inertia

Question 8

An unequal sharing of electrons results in what type of chemical bonds?

Accepted Answer

A) polar covalent 
B) covalent 
C) ionic 
D) hydrogen 
E) peptide 
A) polar covalent 
B) covalent 
C) ionic 
D) hydrogen 
E) peptide

Question 9

The actual mass of an atom is known as its ________ ________.

Accepted Answer

The answer of The actual mass of an atom is...

Question 10

In an aqueous solution,cations are attracted toward

Accepted Answer

A) sodium. 
B) salt. 
C) buffers. 
D) anions. 
E) hydrogen ions. 
A) sodium. 
B) salt. 
C) buffers. 
D) anions. 
E) hydrogen ions.

Question 11

Which pH of the following is the most acidic?

Accepted Answer

A) pH 2 
B) pH 6 
C) pH 4 
D) pH 3 
E) pH 1 
A) pH 2 
B) pH 6 
C) pH 4 
D) pH 3 
E) pH 1

Question 12

When a small amount of HCl or NaOH is added to a solution of Na₂HPO₄,the pH of the solution barely changes.Based on these observations,all of the following are true concerning the compound Na₂HPO₄,except

Accepted Answer

A) Na₂HPO₄ is able to accept extra hydrogen ions from the HCl. 
B) Na₂HPO₄ is able to donate hydrogen ions to the OH⁻ from NaOH. 
C) Na₂HPO₄ adsorbs excess H⁺ and OH⁻ directly onto the surface of its crystalline structure. 
D) Na₂HPO₄ is a salt formed from reacting a strong base with a weak acid. 
E) Na₂HPO₄ acts as a buffer. 
A) Na₂HPO₄ is able to accept extra hydrogen ions from the HCl. 
B) Na₂HPO₄ is able to donate hydrogen ions to the OH⁻ from NaOH. 
C) Na₂HPO₄ adsorbs excess H⁺ and OH⁻ directly onto the surface of its crystalline structure. 
D) Na₂HPO₄ is a salt formed from reacting a strong base with a weak acid. 
E) Na₂HPO₄ acts as a buffer.

Question 13

If a pair of electrons is unequally shared between two atoms,a(n)________ occurs.

Accepted Answer

A) single covalent bond 
B) double covalent bond 
C) triple covalent bond 
D) polar covalent bond 
E) hydrogen bond 
A) single covalent bond 
B) double covalent bond 
C) triple covalent bond 
D) polar covalent bond 
E) hydrogen bond

Question 14

A side chain on an amino acid is sometimes called ________.

Accepted Answer

A) fibrous or globular 
B) a polypeptide chain 
C) an R group 
D) an isozyme 
E) nucleic acid 
A) fibrous or globular 
B) a polypeptide chain 
C) an R group 
D) an isozyme 
E) nucleic acid

Question 15

A fatty acid with no double bonds between carbon atoms is

Accepted Answer

A) unsaturated. 
B) polyunsaturated. 
C) dehydrated. 
D) saturated. 
E) denatured. 
A) unsaturated. 
B) polyunsaturated. 
C) dehydrated. 
D) saturated. 
E) denatured.

Question 16

By weight,which element is the most plentiful in the human body?

Accepted Answer

A) sulfur 
B) sodium 
C) oxygen 
D) potassium 
E) carbon 
A) sulfur 
B) sodium 
C) oxygen 
D) potassium 
E) carbon

Question 17

When atoms complete their outer electron shell by sharing electrons,they form

Accepted Answer

A) ionic bonds. 
B) covalent bonds. 
C) hydrogen bonds. 
D) anions. 
E) cations. 
A) ionic bonds. 
B) covalent bonds. 
C) hydrogen bonds. 
D) anions. 
E) cations.

Question 18

Magnesium atoms have two electrons in the outermost shell and chlorine atoms have seven.The compound magnesium chloride would contain

Accepted Answer

A) 1 magnesium and 1 chlorine. 
B) 1 magnesium and 2 chlorine. 
C) 2 magnesium and 1 chlorine. 
D) 2 magnesium and 7 chlorine. 
E) impossible to tell without more information 
A) 1 magnesium and 1 chlorine. 
B) 1 magnesium and 2 chlorine. 
C) 2 magnesium and 1 chlorine. 
D) 2 magnesium and 7 chlorine. 
E) impossible to tell without more information

Question 19

The molecule H₂ is known as

Accepted Answer

A) hydrohydrogen. 
B) hydrogen. 
C) hydroxide. 
D) helium. 
E) semi-water. 
A) hydrohydrogen. 
B) hydrogen. 
C) hydroxide. 
D) helium. 
E) semi-water.

Question 20

One mole of any element

Accepted Answer

A) has the same mass. 
B) has the same weight. 
C) has the same number of atoms. 
D) has the same number of electrons. 
E) All of the answers are correct. 
A) has the same mass. 
B) has the same weight. 
C) has the same number of atoms. 
D) has the same number of electrons. 
E) All of the answers are correct.

Exam 2: The Chemical Level of Organization

Lipids

The weakest bond between two atoms is the ________ bond.

Carbohydrates,lipids,and proteins are classified as

Atoms of the same element whose nuclei contain the same number of protons,but different numbers of neutrons,are called ________.

Artificial sweeteners

Which of the following is not a cation?

Which property of water helps keeps body temperature stabilized?

An unequal sharing of electrons results in what type of chemical bonds?

The actual mass of an atom is known as its ________ ________.

In an aqueous solution,cations are attracted toward

Which pH of the following is the most acidic?

When a small amount of HCl or NaOH is added to a solution of Na₂HPO₄,the pH of the solution barely changes.Based on these observations,all of the following are true concerning the compound Na₂HPO₄,except

If a pair of electrons is unequally shared between two atoms,a(n)________ occurs.

A side chain on an amino acid is sometimes called ________.

A fatty acid with no double bonds between carbon atoms is

By weight,which element is the most plentiful in the human body?

When atoms complete their outer electron shell by sharing electrons,they form

Magnesium atoms have two electrons in the outermost shell and chlorine atoms have seven.The compound magnesium chloride would contain

The molecule H₂ is known as

One mole of any element

An Introduction to Anatomy and Physiology

The Cellular Level of Organization

The Tissue Level of Organization

The Integumentary System

Osseous Tissue and Bone Structure

The Axial Skeleton

The Appendicular Skeleton

Articulations

Muscle Tissue

The Muscular System

Neural Tissue

The Spinal Cord, spinal Nerves, and Spinal Reflexes

The Brain and Cranial Nerves

Neural Integration I: Sensory Pathways and the Somatic Nervous System

Neural Integration Ii: the Autonomic Nervous System and

The Special Senses

The Endocrine System

Blood

The Heart

Blood Vessels and Circulation

The Lymphatic System and Immunity

The Respiratory System

The Digestive System

Metabolism and Energetics

The Urinary System

Fluid, electrolyte, and Acid-Base Balance

The Reproductive System

Development and Inheritance

Filters

The actual mass of an atom is known as its .