Kerala SCERT Class 9 Biology Simple Nutrients into Cells Question Answer
Kerala SCERT Class 9 Biology Chapter 3 Simple Nutrients into Cells Question Answer Solution Here. Kerala Board Class 9 Students can find Here 3rd Chapter Simple Nutrients into Cells Notes provide by our Teacher. Important Question Answer from Chapter 3 Simple Nutrients into Cells.
- Board- Kerala Board.
- Class – 9.
- Subject – Biology Part 1
- Chapter – 3
- Chapter Name – Simple Nutrients into Cells.
- Topic – Question Answer Solution.
More Notes by Expert Teacher:
1.) What are anti-coagulants? Give an example of an anti-coagulant.
A chemical which is used as blood thinner, this avoids the formation of clumps in blood. EDTA (ethylene diamine tetra acetic acid) is an example of anti-coagulant.
2.) What are the three types of proteins in plasma? Write importance of the proteins
The three types of proteins present in plasma are albumin, globulin, and fibrinogen. Albumin regulates blood pressure, globulin is important in defense mechanisms, fibrinogen in coagulation of blood.
3.) Case base question
Akshay visited a science exhibition in a school on science some students of 12th standard presented the model of lungs and heart. Where they showed the respiration and pumping of blood in the heart. While observing Akshay had some questions. Answer the following
a) Where is heart situated?
b) What is pericardium? State its importance.
a) The heart is situated slightly tilted towards the left in between the two lungs behind the sternum in the thoracic cavity.
b) Pericardium is a double layered membrane that covers the heart. Fluid named pericardium is filled in between the pericardial membrane. It helps to reduce friction between the membranes when the heart beats.
4.) Explain the mechanism of water transport in plants with the help of labeled diagram?
5.) Write the difference between three types of blood vessels
veins |
arteries |
Capillaries |
Carry blood to hear |
Carries blood from heart | Connects veins and arteries |
Have thin wall | Have thick and elastic wall |
Have thin wall of single layers of cell |
Valves are seen inside |
No valves seen | Valves are absent |
Blood flow has low speed | Blood flow has high speed |
Blood flow has low speed |
Blood flow has low pressure |
Blood flow has high pressure |
Blood flow has low pressure |
6) Name the pacemaker of the heart? What is to be done if it has damage in function?
The rate of heartbeat is controlled by Sino atrial node. It is found on the right atrial wall. It functions like an electric cell, hence known as pacemaker. If it does not function properly doctors suggest placing an artificial pacemaker. It has two parts the first part is the pulse generator, the second is the mechanism which transmits electric signals from the first part to the heart.
7) Write about the order of blood from heart to other part of body and again to heart?
The flow of blood through the heart to other body parts and back to heart is divided into right and left side of heart both the parts work together to maintain proper blood flow.
Right part
Co2 rich blood/ oxygen poor blood from different parts of the body reaches the right atrium with the help of two veins inferior vena cava and superior vena cava.
When the right ventricle is full it squeezes and opens the pulmonary valve. Flow flows through your pulmonary artery to your lungs, where it gets oxygen.
Left part
O2 rich blood from the lungs reaches the left atrium through pulmonary veins. The mitral valves open to send blood from the left atrium to the left ventricle.
When the left ventricle is full it squeezes and opens aortic valves. The heart sends through aortic valve to aorta where it flows to the body.
8) Write about the double circulation method for blood?
Double circulation includes systemic circulation and pulmonary circulation.
Systemic circulation starts from the left ventricle and ends in the right atrium.
The circulation that starts from the right ventricle and ends in the left atrium is called pulmonary circulation.
9) Sphygmomanometer is used to measure blood pressure. Explain the terms heartbeat pulse and blood pressure and relation between them if any?
One systole and subsequent diastole together is a heartbeat.
Contraction of the chamber of the heart is termed as systole. During this phase, blood flows from atria to the ventricles and from ventricle to outside along with atria the ventricle relaxes the relaxation stage is termed as diastole.
The wave like movement formed due to the contraction and relaxation of the heart through the walls of arteries. This is called pulse.
70 ml of blood is pumped into the arteries every time the heart contracts. Pressure exerted by this excess blood on the wall of the arteries is systolic pressure. This is 120mmHg.
When the heart dilates fully the same quantity of blood enters the heart. A low pressure felt in the arteries during this time is known as diastolic pressure. This is 80mmHg. This systolic pressure and diastolic pressure is known as blood pressure.
10) Write a short note on spleen?
Most important function of spleen is providing immunity. There are two types of tissue red pulp tissue filter and remove old and damaged RBCs. Iron is protected by the same red pulp tissue.
White pulp cells store T cells and B cells which are the main components of immune system. The lymphocytes which identify and kill pathogen are produced by spleen.
Also See: This Chapter MCQ Question and Answer