Tag: biology

Questions Related to biology

In closed circulatory system 

types of circulatory system circulatory pathways transportation in plants and circulation in animals body fluids and circulation biology

  1. The cells and tissues are directly bathed in the blood pumped out by heart

  2. Arteries and veins are lacking

  3. The capillaries are largest blood vessels and closed at their ends

  4. Blood circulates through a series of vessels of varying diameters

Show answer
Correct Option: D
Explanation:

  • Closed circulatory system has blood enclosed all the time within the vessels. In this system, blood is pumped by the heart through vessels.
  • It is more structured and controlled.

So, the correct option is 'Blood circulates through a series of vessels varying diameters'

Which of the following groups of animals have closed circulatory system?

types of circulatory system circulatory pathways transportation in plants and circulation in animals body fluids and circulation biology

  1. Cockroach, Locust, Molluscs

  2. Non-cephalopod molluscs, Cockroach

  3. Cephalopod molluscs and Earthworm

  4. Hemichordates and Non-cephalopd molluscs

Show answer
Correct Option: C
Explanation:

Closed circulatory system has blood closed in all vessels within vessels of different sizes. In this type, the blood is pumped through vessels by heart. This type of circulatory system is more structured and controlled. 

So, the correct option is 'Cephalopod molluscs and earthworm'.

An open circulatory system occurs in the

types of circulatory system circulatory pathways transportation in plants and circulation in animals body fluids and circulation biology

  1. Reptiles

  2. Birds

  3. Insects

  4. Annelids

Show answer
Correct Option: C
Explanation:

An open circulatory system describes a system where blood and interstitial fluid (fluid found between cells in the body) are allowed to mix in an organism. Organisms that have an open circulatory system don't have true blood since it is mixed with other fluids. The blood in these organisms is defined as haemolymph. Two of the largest phyla in the world, arthropoda and mollusca, have an open circulatory system. Arthropods include most insects and sea organisms like crabs and lobsters. Molluscs are organisms with two shells that are hinged together. Examples include clams and oysters. However, not all molluscs have an open circulatory system. Two major members of the mollusc family, octopus and squid, have a closed circulatory system. 

Circulatory system in cockroach is 

types of circulatory system circulatory pathways transportation in plants and circulation in animals body fluids and circulation biology

  1. Open

  2. Closed

  3. Semi-open

  4. Sometimes open and sometimes closed

Show answer
Correct Option: A
Explanation:

Insects have an open circulatory system, which differs in both structure and function from the closed circulatory system found in humans and other vertebrates. In an open system, blood (usually called haemolymph) flows freely within body cavities, where it makes direct contact with all internal tissues and organs.

Which of the following animals has blood as circulating medium?

types of circulatory system circulatory pathways transportation in plants and circulation in animals body fluids and circulation biology

  1. Cockroach

  2. Mussel

  3. Leech

  4. Planaria

Show answer
Correct Option: C
Explanation:

Leeches belong to Phylum Annelida and have closed circulatory systems that carry blood, nutrients etc to all parts of the body.

So, the correct answer is 'Leech'

In a closed circulatory system, blood is completely enclosed with in

types of circulatory system circulatory pathways transportation in plants and circulation in animals body fluids and circulation biology

  1. Sinuses

  2. Vessels

  3. Heart

  4. Skeleton

Show answer
Correct Option: B
Explanation:

In a closed circulatory system, blood is always contained within vessels - arteries, veins, capillaries.

Choose the correct answer from the alternatives given.
Which of the following has a closed type of circulatory system?

types of circulatory system circulatory pathways transportation in plants and circulation in animals body fluids and circulation biology

  1. Cockroach

  2. Fish

  3. Scorpion

  4. Mollusc

Show answer
Correct Option: B
Explanation:
  • In an open circulatory system, the blood is pumped by the heart into the body cavity or the hemocoel. It is found in Arthropoda and Molluscs. Example: Cockroach, Scorpian.
  • In a closed circulatory system, the blood is circulated through blood vessels. It is found in vertebrates and annelids. Example: Fish.
So, the correct option is 'Fish'.

Choose the correct answer from the alternatives given.
Which of the following is the part of a closed, but not an open, circulatory system?

types of circulatory system circulatory pathways transportation in plants and circulation in animals body fluids and circulation biology

  1. Heart

  2. Haemocoel

  3. Capillary beds

  4. Ostia

Show answer
Correct Option: C
Explanation:

In an open circulatory system, the blood is not confined within blood vessels. The blood bathes the organs and tissues directly. Because of this the blood and the interstitial fluid have no distinction. Thus, the term hemolymph is used. The hemolymph is pumped by the heart through the vessels into the sinuses and then to the surrounding cells where the exchange of materials occur. The hemolymph is taken back to the heart through the ostia that close via the valves during heart contraction.

So, the correct option is 'Capillary beds'.

State whether the following statements are true or false.
The oxygen carrying pigments are mostly dissolved in blood plasma in a closed circulatory system.

types of circulatory system circulatory pathways transportation in plants and circulation in animals body fluids and circulation biology

  1. True

  2. False

Show answer
Correct Option: B
Explanation:

Oxygen carrying pigment haemoglobin are present as separate entities and not found dissolved in plasma like inorganic salts. 

So, the correct option is 'False'.

Choose the correct answer from the alternatives given.
In the sinuses of an open circulatory system,-blood is not segregated from:

types of circulatory system circulatory pathways transportation in plants and circulation in animals body fluids and circulation biology

  1. urine

  2. interstitial fluid

  3. digestive cavity

  4. cytoplasm

Show answer
Correct Option: B
Explanation:

The open circulatory system is common to molluscs and arthropods. Open circulatory systems (evolved in crustaceans, insects, mollusks and other invertebrates) pump blood into a hemocoel with the blood diffusing back to the circulatory system between cells. Blood is pumped by a heart into the body cavities, where tissues are surrounded by the blood. So, the blood is not segregated from interstitial fluid.

So, the correct option is 'Interstitial fluid'.