1. Which of the following hormones helps regulate blood pressure by affecting kidney function?

A. Insulin
B. Testosterone
C. Renin
D. Estrogen

Correct answer: C

Rationale: The correct answer is C: Renin. Renin is an enzyme produced by the kidneys that plays a crucial role in regulating blood pressure. Renin helps control blood pressure by initiating a series of reactions that ultimately lead to the production of angiotensin, a hormone that constricts blood vessels and increases blood pressure. Insulin is a hormone that regulates blood sugar levels, not blood pressure. Testosterone and estrogen are sex hormones that do not have a direct impact on kidney function or blood pressure regulation. Therefore, the correct hormone that helps regulate blood pressure by affecting kidney function is Renin.

2. What is the formula for calculating density?

A. Density = Volume / Mass
B. Density = Mass Ã— Volume
C. Density = Mass / Volume
D. Density = Volume - Mass

Correct answer: c

Rationale: Density is defined as the mass of a substance divided by its volume. The formula for density is Density = Mass / Volume.

3. The energy absorbed during a chemical reaction is called:

A. Kinetic energy
B. Potential energy
C. Heat energy
D. Endothermic energy

Correct answer: D

Rationale: Endothermic means "inward heat," indicating energy is absorbed during the reaction.

4. She came across a theory which states that the leadership style is effective dependent on the

A. Democratic
B. Authoritarian
C. Laissez faire
D. Bureaucratic

Correct answer: A

Rationale: The correct answer is A: "Democratic" because democratic leadership style is effective dependent on the participation and input of team members. In a democratic leadership style, decisions are made through discussion and consensus building, which can lead to higher levels of job satisfaction and productivity. Authoritarian leadership style emphasizes control and obedience, while laissez-faire leadership style lacks guidance and structure, and bureaucratic leadership style focuses on rules and regulations. Therefore, democratic leadership style is considered effective as it values the opinions and contributions of team members, leading to better outcomes and team cohesion.

5. The Becquerel (Bq) is the designated unit for quantifying:

A. Electron volt (eV) measurements of energy
B. Radioactivity
C. Electric charge (Coulombs)
D. Force (Newtons)

Correct answer: B

Rationale: The Becquerel (Bq) is the designated unit for quantifying radioactivity. Radioactivity is the measure of the rate at which radioactive atoms undergo nuclear decay and emit radiation. One Becquerel is equal to one nuclear decay event per second. This unit is named after Henri Becquerel, the scientist who discovered radioactivity. Therefore, option B, 'Radioactivity,' is the correct answer. Electron volt (eV) measurements of energy are quantified using a different unit, electric charge is measured in Coulombs, and force is quantified in Newtons, making them incorrect choices for this question.

6. The peripheral nervous system can be further divided into which two main parts?

A. Sensory and motor
B. Sympathetic and parasympathetic
C. Myelinated and unmyelinated
D. Central and peripheral

Correct answer: A

Rationale: The correct answer is A: 'Sensory and motor.' The peripheral nervous system is divided into two main parts based on their functions. The sensory division (afferent) transmits sensory information from receptors to the central nervous system, while the motor division (efferent) transmits signals from the central nervous system to muscles and glands to produce a response. Options B, C, and D are incorrect as they do not accurately describe the main divisions of the peripheral nervous system. Understanding this division is crucial in comprehending how information is processed and responses are generated in the body.