Question

1. Which of the following describes a correct order of structures in the respiratory
passageways?
a. pharynx, trachea, larynx, bronchi, bronchioles
b. larynx, pharynx, trachea, bronchioles, bronchi
c. trachea, pharynx, larynx, bronchi, bronchioles
d. pharynx, larynx, trachea, bronchi, bronchioles

2. Most oxygen in the blood is transported
a. as gas dissolved in plasma
b. as oxyhemoglobin
c. as carboxyhemoglobin
d. as bicarbonate

3. Which of the following events in the mouth cavity will be affected if salivary amylase is
lacking in the saliva?
(a) Starch breaking down into sugars.
(b) Proteins breaking down into amino acids.
(c) Absorption of vitamins.
(d) Fats breaking down into fatty acids and glycerol.

4. The contraction and expansion movement of the walls of the food pipe is called:
(a) translocation
(b) transpiration
(c) peristaltic movement
(d) digestion

5. When a few drops of iodine solution are added to rice water, the solution turns blue-black in colour. This indicates that rice water contains:
(a) fats
(b) complex proteins
(c) starch
(d) simple proteins

Answer 1

Answer:

A child is guileless. He /she is innocent. He multiplies his joy and halves his sorrow by sharing them with friends. A child does not have lasting anger and is quick to forgive and forget wrongs done to him. His friendship is genuine and laughter natural and spontaneous.

Answer 2

1. Which of the following describes a correct order of structures in the respiratory  passageways?

• Option D) pharynx, larynx, trachea, bronchi, bronchioles is correct answer.
• The respiratory system is a collection of organs and tissues that assist in breathing.
• Your airways, lungs, and blood vessels are all part of it.
• The breathing system includes the muscles that power your lungs.
• These components work together to transport oxygen throughout the body while also removing waste gases such as carbon dioxide.

2. Most oxygen in the blood is transported

• Option B) as oxyhemoglobin is correct answer.
• Oxyhemoglobin is the oxygen-carrying form of haemoglobin in which the iron has been decreased (ferrous).
• Methemoglobin is a nonfunctional form of haemoglobin that results from the oxidation of ferrous iron to ferric iron.
• Methemoglobin is useless since it is unable to bind oxygen.

3. Which of the following events in the mouth cavity will be affected if salivary amylase is  lacking in the saliva?

• Option A) Starch breaking down into sugars is correct answer.
• Salivary amylase, a digestive enzyme, breaks down starch into simple sugars (maltose) and aids digestion.
• As a result, if salivary amylase is deficient, starch breakdown will be hampered.

4. The contraction and expansion movement of the walls of the food pipe is called:

• Option C)  peristaltic movement is correct answer.
• Peristalsis is a wave-like movement that occurs in the alimentary canal and includes muscular contraction and relaxation.
• It starts in the oesophagus and aids in the digestion of food by moving it along the alimentary canal.

5. When a few drops of iodine solution are added to rice water, the solution turns blue-black in colour. This indicates that rice water contains:

• Option C) Starch is correct answer.
• Amylose in starch is the key factor in colour development because iodine reacts with the beta coils structure of amylose and produces a blue-black colour when it comes into touch with it.  
• As a result of the iodine reaction with rice water, rice water includes starch.