Transport Systems Questions

Objective Questions

Which of the following is NOT involved in the transport of substances in the body?

(A) Lymph (B) Plasma (C) Leucocytes (D) Erythrocytes

Correct Answer: (C) Leucocytes

Unicellular organisms transport essential nutrients directly to all parts of their bodies by the process of diffusion because they have:

(A) A large volume-to-surface area ratio (B) A large surface area-to-volume ratio (C) Their bodies immersed in the nutrients (D) Their outer membrane made of cellulose

Correct Answer: (B) A large surface area-to-volume ratio

The transportation of oxygen and carbon (IV) oxide in mammals is carried out by:

(A) Leucocytes (B) Thrombocytes (C) Phagocytes (D) Erythrocytes

Correct Answer: (D) Erythrocytes

A circulatory system that does not allow mixing of oxygenated and deoxygenated blood in the mammalian heart is referred to as:

(A) Open (B) Haemocoelic (C) Single (D) Closed

Correct Answer: (D) Closed

The chamber of the mammalian heart with the thickest wall is the:

(A) Right ventricle (B) Left auricle (C) Right auricle (D) Left ventricle

Correct Answer: (D) Left ventricle

Blood platelets are important because they:

(A) Are amoeboid and nucleated (B) Produce antitoxins (C) Produce antibodies (D) Digest harmful bacteria (E) Release thrombin for blood clotting

Correct Answer: (E) Release thrombin for blood clotting

Blood circulation in a mammal is said to be double because:

(A) It passes twice through the heart in the complete circuit (B) It moves in both arteries and veins (C) It circulates in both the heart and other organs (D) The heart contains auricles and ventricles

Correct Answer: (A) It passes twice through the heart in the complete circuit

Fibrinogen and prothrombin play important roles in the:

(A) Deamination of proteins (B) Clotting of blood (C) Detoxification of substances (D) Storage of vitamins

Correct Answer: (B) Clotting of blood

Deoxygenated blood flows into the right and left lungs through the:

(A) Pulmonary vein (B) Vena cava (C) Pulmonary artery (D) Subclavian vein

Correct Answer: (C) Pulmonary artery

The main vein which returns blood from the brain to the heart in animals is:

(A) Portal vein (B) Renal vein (C) Jugular vein (D) Pulmonary vein

Correct Answer: (C) Jugular vein

Which of the following blood components has the greatest affinity for oxygen and carbon (IV) oxide?

A) Lymphocyte B) Erythrocyte C) Blood plasma D) Thrombocyte

Correct Answer: B) Erythrocyte

Which of the following blood vessels carries oxygenated blood into the heart?

A) Pulmonary artery B) Anterior vena cava C) Pulmonary vein D) Posterior vena cava

Correct Answer: C) Pulmonary vein

The blood vessel which carries blood from the alimentary canal to the liver is the ___________.

A) hepatic artery B) hepatic vein C) hepatic portal vein D) mesenteric artery

Correct Answer: C) hepatic portal vein

Circulation of blood to all parts of the body except the lungs is through?

(A) The pulmonary artery (B) Systemic circulation (C) The lymphatic system (D) Pulmonary circulation

Correct Answer: (B) Systemic circulation

The correct pathway for blood flow from the heart to the tissues of mammals is?

(A) Heart-arteriole-artery-tissues (B) Heart-artery-arteriole-tissues (C) Heart-vein-venule-tissues (D) Heart-venule-vein-tissues

Correct Answer: (B) Heart-artery-arteriole-tissues

Which of the following is the primary function of xylem in plants?

(A) Transport of sugars and nutrients (B) Transport of water and minerals (C) Transport of oxygen (D) Transport of hormones

Correct Answer: (B) Transport of water and minerals

Which of the following is a characteristic feature of phloem tissue?

(A) It consists of dead cells (B) It transports water and minerals (C) It contains sieve tubes and companion cells (D) It is made up of only one type of cell

Correct Answer: (C) It contains sieve tubes and companion cells

Water moves through the xylem primarily by which process?

(A) Diffusion (B) Active transport (C) Capillary action and transpiration pull (D) Osmosis

Correct Answer: (C) Capillary action and transpiration pull

Which of the following factors does NOT affect the rate of transpiration?

(A) Temperature (B) Wind speed (C) Light intensity (D) Oxygen concentration

Correct Answer: (D) Oxygen concentration

How does increased humidity affect transpiration?

(A) Increases transpiration (B) Decreases transpiration (C) Has no effect on transpiration (D) Stops photosynthesis

Correct Answer: (B) Decreases transpiration

Theory Questions

A sample of human blood was put in a test tube and allowed to spin in a centrifuge. The components of the blood sample were clearly separated.

List the four main components of blood that would be in the test tube.
Name the components of the blood that:
1. Would form the top layer in the test tube
2. Destroys pathogens
3. Is bi-concave in shape
4. Would be relatively low in a haemophilic condition
5. Is produced in the bone marrow
6. Is a thrombocyte
7. Is nucleated
Mention three chemical substances transported by the blood component named in 1(b)(i)
List four diseases associated with blood.
Explain briefly why a disease of the blood could be dangerous.

Outline the three functions of the blood

List five materials for transportation

State four differences between open and closed circulatory system

Write short note on: Arteries, veins and capillaries