Which of the following will ease the friction between the ends of bones in a movable joint?

A. Serum

B. Tissue

C. Blood plasma

D. Synovial fluid.

Diffusion is most effective in living organisms, when the surface area is

A. large and the thickness is also large

B. small while the thickness is large

C. large while the thickness is small

D. the same as its thickness.

The function of the red blood cells is to

A. engulf invading bacteria

B. aid in protein formation

C. transport oxygen to the cells

D. control blood glucose level

Which of the following is used to measure the rate of water uptake in plants?

A. Potometer

B. Hydrometer

C. Hygrometer

D. aspirator

Which of the following does not occur during inhalation in mammals?

A. Rib cage is raised up

B. Diaphragm contracts and becomes dome shaped

C. Inter-coastal muscle contracts

D. Volume of the thoracic cavity increases.

The oxygen released during photosynthesis is obtained

A. from the catalytic splitting of carbon-dioxide in plant tissues

B. from the breakdown of glucose molecules in cells

C. during the photolysis of water using energy trapped in chlorophyll

D. by the excretion of excess oxygen in plant tissues

In which of the following processes in mammals is liquid passed from blood capillaries to Bowman‘s capsule?

A. Filtration

B. Diffusion

C. Osmosis

D. Reabsorption

Adrenalin is considered as a hormone for “fright and flight” because it

A. controls the fluid content of the body

B. is used in protein metabolism

C. plays a role in the pH balance of the body fluids

D. prepares the body for action.

Which of the following organs in humans is responsible for the removal of excess water?

A. The spleen

B. The kidney

C. Large intestine

D. Small intestine

In humans, which of the following pairs of hormones correspond to male and female respectively?

A. Oestroqen and adrenalin

B. Progesterone and testosterone

C. Testosterone and oestrogen

D. Adrenalin and progesterone