Coordination and control

What are the two main types of messengers used for coordination and control in living organisms?

• Enzymes and vitamins

• Nerves and hormones

• Proteins and carbohydrates

• DNA and RNA

How do hormones primarily travel throughout the body to reach target cells?

• Through nerve impulses

• Via direct cell-to-cell contact

• In the bloodstream

• Through lymphatic fluid

Which of the following is a characteristic of hormone action?

• Fast-acting and short-lived effects

• Localized effects only

• Slow-acting and long-lasting effects

• Only affects cells without receptors

What type of messages are hormones?

• Electrical

• Electrochemical

• Chemical

• Mechanical

Which type of communication is characterized by fast-acting, short-lived, and highly specific responses?

• Hormonal communication

• Nervous communication

• Endocrine communication

• Chemical communication