Meaning: 'Pressure' refers to the force exerted by the blood against the walls of blood vessels, which is a critical aspect of cardiovascular health.

Wrong options:

• depressor: 'Depressor' is a noun that refers to something that lowers or reduces, but it does not fit contextually as a remedy for blood issues.
• whenever: 'Whenever' is an adverb indicating time, which does not fit grammatically or contextually in this sentence.
• quicker: 'Quicker' is an adjective that describes speed, which is irrelevant in the context of a remedy for blood.

Correct answer: actually

Explanation: The word 'actually' serves as an adverb that emphasizes the truth of the statement regarding blood vessels relaxing, fitting well within the context of the sentence and providing clarity to the action described.

Meaning: 'Actually' means 'in fact' or 'really,' reinforcing the idea that blood vessels do indeed relax as a result of the remedy being discussed.

Wrong options:

• actually: This is the correct answer.
• unfashionably: 'Unfashionably' is an adverb that describes something out of style, which does not relate to the physiological process of blood vessels relaxing.
• anonymously: 'Anonymously' refers to acting without revealing one's identity, which is irrelevant in this context.
• concomitantly: 'Concomitantly' means occurring at the same time, which does not accurately describe the action of blood vessels relaxing in this context.

Correct answer: production

Explanation: The word 'production' is a noun that refers to the process of creating or generating something, which fits grammatically and contextually as it describes the increase of a signaling molecule in the body.

Meaning: 'Production' means the act of producing or generating something, in this case, the signaling molecule nitric oxide.

Wrong options:

• production: This is the correct answer.
• impulsion: 'Impulsion' refers to a driving force or impulse, which does not fit the context of generating a molecule.
• cannon: 'Cannon' is a noun referring to a large gun, which is completely unrelated to the context of blood and signaling molecules.
• bondmen: 'Bondmen' refers to enslaved individuals or laborers, which is irrelevant in this scientific context.

Correct answer: researchers

Explanation: The word 'researchers' is a noun that refers to individuals conducting scientific studies, fitting grammatically and contextually as it describes the people involved in the study mentioned in the sentence.

Meaning: 'Researchers' are individuals who investigate and study a particular subject to gain new knowledge, in this case, about the effects of capsaicin on rats.

Wrong options:

• researchers: This is the correct answer.
• cookers: 'Cookers' refers to individuals who prepare food, which does not relate to the scientific study being discussed.
• supervisors: 'Supervisors' are individuals who oversee others, which does not accurately describe the role of those conducting the study.
• deans: 'Deans' are academic administrators, which is unrelated to the context of conducting research.

Correct answer: substantially

Explanation: The word 'substantially' is an adverb that indicates a significant degree or extent, fitting well in the context of describing the impact of capsaicin on lowering blood pressure.

Meaning: 'Substantially' means to a large extent or degree, indicating that the reduction in blood pressure was significant.

Wrong options:

• mortality: 'Mortality' refers to the state of being subject to death, which does not fit the context of lowering blood pressure.
• bisexuality: 'Bisexuality' refers to sexual attraction to both men and women, which is irrelevant in this context.
• practicality: 'Practicality' refers to the quality of being practical or useful, which does not relate to the effects of capsaicin on blood pressure.

Correct answer: short-term

Explanation: The phrase 'short-term' is an adjective that describes effects occurring over a brief period, fitting grammatically and contextually as it contrasts with the long-term effects being discussed.

Meaning: 'Short-term' refers to a limited duration, indicating that previous studies only examined effects that did not last long.

Wrong options:

• mortem: 'Mortem' refers to death, typically used in the phrase 'post-mortem,' which is irrelevant in this context.
• short-term: This is the correct answer.
• glowworm: 'Glowworm' refers to a bioluminescent insect, which has no relevance to the context of blood pressure studies.
• totem: 'Totem' refers to a symbolic object or emblem, which does not fit the context of scientific research.