$$\text{Fibrinogen} \xrightarrow{\text{Platelets}} \text{Fibrin}$$

Question 1

Which of the following best describes the role of platelets in wound healing?

Accepted Answer

Platelets stimulate the conversion of fibrinogen into fibrin, forming a network that traps red blood cells and creates a clot.

Question 2

A football is rapidly approaching your head. Which sequence correctly describes the biological pathway from detection to response?

Accepted Answer

Stimulus — receptor — coordination — effector — response

Question 3

Which organ acts as a receptor for detecting the smell of food, and what type of energy does it receive?

Accepted Answer

Nose; chemical energy

Question 4

What is the main function of fibrin in the process of blood clotting?

Accepted Answer

Fibrin forms a network that traps red blood cells, creating a clot to prevent blood loss.

Question 5

Which of the following is TRUE about nerve impulses in neurones?

Accepted Answer

Nerve impulses are tiny electrical signals transmitted along neurones.

Question 6

A person touches a hot surface and quickly withdraws their hand. Which type of receptor and energy conversion is involved?

Accepted Answer

Skin temperature receptor; converts heat energy into nerve impulses

Question 7

Which of the following best explains the role of the central nervous system (CNS)?

Accepted Answer

The CNS consists of the brain and spinal cord, processing and coordinating nerve impulses.

Question 8

Which of the following is an example of an effector organ?

Accepted Answer

Muscle

Question 9

In the context of coordination, what is the correct order of events when a person smells food and begins to salivate?

Accepted Answer

Stimulus — receptor — coordination — effector — response

Question 10

Which of the following statements about genetically engineered harmless bacteria used in medicine is correct?

Accepted Answer

They are engineered to carry antigens of disease-causing microorganisms for vaccine development.

Question 11

Which formula best represents the conversion of soluble plasma protein to insoluble fibrin during blood clotting?

Accepted Answer

$$	ext{Fibrinogen} \xrightarrow{	ext{Platelets}} 	ext{Fibrin}$$

Question 12

Which of the following best describes the function of sensory neurones?

Accepted Answer

They transmit impulses from receptors to the CNS.

Question 13

A person hears a loud sound and turns their head toward it. Which receptor and energy conversion are involved?

Accepted Answer

Ear; converts sound energy into nerve impulses

Question 14

Which of the following is NOT a function of glands in the coordination system?

Accepted Answer

Producing nerve impulses for transmission

Question 15

Which of the following is a plausible consequence if platelets fail to function properly after skin damage?

Accepted Answer

Prolonged bleeding and increased risk of pathogen entry

Question 16

Which of the following best describes the role of mixed nerves?

Accepted Answer

They contain both sensory and motor neurones.

Question 17

Which organ converts light energy into nerve impulses?

Accepted Answer

Eye

Question 18

Which of the following is the biological name for a nerve cell?

Accepted Answer

Neurone

Question 19

Which of the following best explains why a scab forms after a wound?

Accepted Answer

A scab forms to trap pathogens and prevent infection while new skin grows.

Question 20

Which of the following is an example of a stimulus in the coordination system?

Accepted Answer

A change in the animal's surroundings

Coordination and Response in Human Biology: Platelets, Stimulus-Response, and the Nervous System

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