Question 1

Which of the following best describes the concept of 'Conservation of Matter' in chemical reactions within the human body?

Accepted Answer

Matter changes form but the total amount remains constant.

Question 2

Which element is most abundant in the human body and is essential for cellular respiration?

Accepted Answer

Oxygen

Question 3

A patient presents with muscle cramps and irregular heartbeat. Which electrolyte imbalance is most likely responsible?

Accepted Answer

Low potassium (K+)

Question 4

Which type of chemical bond involves the sharing of electrons between atoms?

Accepted Answer

Covalent bond

Question 5

The pH of human blood is tightly regulated. What is the normal range for blood pH?

Accepted Answer

$$7.35 to$$ $$7.45$$

Question 6

Which equation represents the buffer system that helps maintain blood pH?

Accepted Answer

$$CO_2 + H_2O$$ \rightarrow H_2CO_3 \rightarrow $$HCO_3^- + H$$^+$$

Question 7

Which physical state of matter in the body is characterized by a fixed volume but no fixed shape?

Accepted Answer

Liquid

Question 8

A chemical reaction in the body that combines smaller molecules to form a larger molecule is called:

Accepted Answer

Synthesis reaction

Question 9

Which trace element is essential for the synthesis of thyroid hormones?

Accepted Answer

Iodine (I)

Question 10

If a solution has a pH of $$2$$, which of the following best describes its acidity?

Accepted Answer

Strongly acidic

Question 11

Which mineral is most important for the structural integrity of bones?

Accepted Answer

Calcium (Ca++)

Question 12

What is the atomic number of an element with $$6$$ protons, $$6$$ neutrons, and $$6$$ electrons?

Accepted Answer

$$6$$

Question 13

Which of the following best explains why water is vital for life?

Accepted Answer

It acts as a universal solvent, facilitating chemical reactions.

Question 14

Which chemical reaction type is represented by the equation $$AB \rightarrow A + B$$?

Accepted Answer

Decomposition reaction

Question 15

A buffer system in the blood resists changes in pH by:

Accepted Answer

Releasing or absorbing $$H^+$$ ions

Question 16

Which of the following is a correct statement about electrolytes in body fluids?

Accepted Answer

Electrolytes help transmit nerve impulses and muscle contractions.

Question 17

Which of the following is true about the octet rule in atomic structure?

Accepted Answer

Atoms are most stable when their outer shell contains $$8$$ electrons.

Question 18

A patient with blood pH of $$7.2 is $$experiencing which condition?

Accepted Answer

Acidosis

Question 19

Which of the following is a trace element required for hemoglobin synthesis?

Accepted Answer

Iron (Fe)

Question 20

Which equation correctly represents an exchange reaction?

Accepted Answer

$$AB + CD \rightarrow AD + CB$$

The Chemical Level of Organization: Inorganic Chemistry in Anatomy & Physiology

Study Guide - Practice Questions