21. Identify the gland indicated in the picture and answer the following questions
(a) Name the hormone produced by the part indicated as (i) which slows down the action of defense cells.
(b) Name the two hormones produced by the part indicated as (ii). Give their functions.
(c) Write two important functions of aldosterone.
Answer
a) i)Cortex : Hormone - Cortisole
b) ii) Medulla
c)
Epinephrine's (adrenaline) functions are Epinephrineacts along with the sympathetic nervous system during emergencies. This helps to resist or withdraw ourselves from such situations
Nor Epinephrine (nor-adrenaline) functions are Nor Epinephrineacts along with epinephrine.
22. Explain how body will react to the situations described below :
(a) A foreign antigen reaches one's blood.
(b) The components of vaccines enter the body.
Answer
a) When a foreign antigen reaches a person's blood, the recipient's defense activity is stimulated. Then antigen in the received blood and antibody in the recipient's blood will react with each other. This results will be in clotting of the blood. So a person cannot receive any type of blood. One can receive only the blood that matches correctly.
b) Component of vaccines enter the body it act as antigens that stimulate the defense mechanism of the body. Antibodies are formed in the body against them.These antibodies are retained in the body
which later on protect the body from the pathogen responsible for the same disease
Redraw the picture given below. Identify the name indicated and label the parts.
(a) The part refracts light rays into the eye.
(b) The part that adjusts its size as the intensity of light varies.
(c) The part of Retina where plenty of photo receptors are seen.
Answer
(a) Name the hormone produced by the part indicated as (i) which slows down the action of defense cells.
(b) Name the two hormones produced by the part indicated as (ii). Give their functions.
(c) Write two important functions of aldosterone.
Answer
a) i)Cortex : Hormone - Cortisole
b) ii) Medulla
c)
Epinephrine's (adrenaline) functions are Epinephrineacts along with the sympathetic nervous system during emergencies. This helps to resist or withdraw ourselves from such situations
Nor Epinephrine (nor-adrenaline) functions are Nor Epinephrineacts along with epinephrine.
22. Explain how body will react to the situations described below :
(a) A foreign antigen reaches one's blood.
(b) The components of vaccines enter the body.
Answer
a) When a foreign antigen reaches a person's blood, the recipient's defense activity is stimulated. Then antigen in the received blood and antibody in the recipient's blood will react with each other. This results will be in clotting of the blood. So a person cannot receive any type of blood. One can receive only the blood that matches correctly.
b) Component of vaccines enter the body it act as antigens that stimulate the defense mechanism of the body. Antibodies are formed in the body against them.These antibodies are retained in the body
which later on protect the body from the pathogen responsible for the same disease
Redraw the picture given below. Identify the name indicated and label the parts.
(a) The part refracts light rays into the eye.
(b) The part that adjusts its size as the intensity of light varies.
(c) The part of Retina where plenty of photo receptors are seen.
Answer
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