TRANSPORT SYSTEM

Choose the correct order of the chambers through which deoxygenated blood flows in the human heart.

• right atrium-----> right ventricle------> aorta

• right atrium -----> right ventricle------> pulmonary artery

• left atrium------> left ventricle------> aorta

• left atrium-------> left ventricle-------> pulmonary artery

Lymp nodes are widely distributed throughout the body along the lymphatic veins where they filter the _____________before it is returned to the ________________.

• lymph, blood

• lymph, heart

• blood, lymph

• blood, heart

The products of photosynthesis will flow through which part of the phloem tissue?

• collenchyma cells

• vessels

• sieve tube cells

• tracheids

The sound ‘lub’ produced in the cardiac cycle occurs when both

• semilunar valve close simultaneously

• semilunar valve open simultaneously

• atrioventricular valves close simultaneously

• atrioventricular valves open simultaneously

Movement of water up a plant through the xylem vessels is due to?

I Transipration-cohesion-tension mechanism

II Root pressure

III Presure flow

• I only

• I and II only

• II and III only

• I, II and III

Which of the following is NOT true?

• The lymphatic system is an open circulatory system

• The lymphatic system contains one-way valves

• The lymphatic system returns fluid to the bloodstream

• The lymphatic organs are kidney, heart, spleen and lung

Which structures of the human heart receives impulses directly from the sympathetic and parasympathetic system?

• Sinoatrial node

• Atrioventricular node

• Bundle of His

• Purkinje tissue

The basic transpiration-cohesion-tension mechanism involves..

• The entrance of water and ion actively through cell membrane of the root epidermis.

• Water flows in, generating positive pressure

• The formation of weak bonds between water molecules and between water molecules and vessel walls.

• The movement of water into root tissue through stem xylem and leaf xylem, then to the atmosphere

The loading of sucrose into sieve tubes is by ________ transport and consequently, requires ___________.

• Active; ATP

• Passive; energy

• Active; ions

• Passive;ions

Which of the following functions as a source during translocation in plants?

• Merismetic tissue in the root

• Leaves

• Roots

• Fruits and flowers