AP 10th Class Biology Bits Chapter 7 Coordination in Life Processes with Answers

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AP State Syllabus 10th Class Biology Bits 7th Lesson Coordination in Life Processes with Answers

Concept – 1 : Feeling Hungry

Question 1.
When the ………………. level in the blood falls, we feel hunger.
A) Glycogen
B) Plasma
C) Blood cells
D) Glucose
Answer:
D) Glucose

Question 2.
The factor for hunger pangs
A) Leptin
B) HCl
C) Ghrelin
D) Peristalsis
Answer:
C) Ghrelin

Question 3.
The hormone which suppresses the hunger is …………………….
A) Pepsin
B) Leptin
C) Trypsin
D) Ghrelin
Answer:
B) Leptin

Question 4.
The Japanese savory is …………………
A) Bitter
B) Umami
C) Uhani
D) Mirchi powder
Answer:
B) Umami

Question 5.
i) The hormone that stimulates hunger pangs.
ii) The hormone secreted when stomach is full.
A) i – Leptin; ii – Ghrelin
B) i – Ghrelin; ii – Leptin
C) i – Ghrelin; ii – Ptyalin
D) i – Ptyalin; ii – Leptin
Answer:
B) i – Ghrelin; ii – Leptin

Question 6.
When we are hungry, the hunger pangs arise ip our stomach. These hunger pangs are controlled by …………………..
A) diencephalon and 10^th cranial nerve
B) medulla oblongata
C) diencephalon and 5^th cranial nerve
D) peripheral nerves
Answer:
A) diencephalon and 10^th cranial nerve

Question 7.
The duration of hunger pangs in the stomach
A) 1 – 3 hrs
B) 30 – 45 hrs
C) 30 – 45 min
D) 4 – 5 hrs
Answer:
C) 30 – 45 min

Question 8.
Which of the following is not concerned with Ghrelin ?
A) This hormones secreted when the stomach is empty.
B) Certain cells in the walls of stomach secretes Ghrelin.
C) Due the Ghrelin, hunger signals generate.
D) Ghrelin suppresses the hunger.
Answer:
D) Ghrelin suppresses the hunger.

Question 9.
Which of the following is not concerned with hunger pang signals ?
A) Ghrelin
B) Vagus nerve
C) Diencephelon
D) Umami
Answer:
D) Umami

Question 10.
If ghrelin is not secreted ………………….
A) No hunger pangs
B) Hunger pdngs occur
C) Severe hunger pangs
D) No secretion of enzymes
Answer:
A) No hunger pangs

Question 11.
The system which controls the levels of glucose in the blood is …………………
A) Digestive system
B) Circulation system
C) Respiratory system
D) Excretory’systetti
Answer:
A) Digestive system

Question 12.
The region in brain portion that controls hunger signals
A) medulla
B) diencephalon
C) cerebrum
D) mid brain
Answer:
B) diencephalon

Question 13.
The nerve that carries hunger signals to brain ……………..
A) Coronary nerve
B) Vagus nerve
C) 13^th cranial nerve
D) Medulla oblongata
Answer:
B) Vagus nerve

Question 14.
Sireesha is suffering with serious headache. It is known that she didn’t eat from the morning. Give the correct reason for headache.
A) The level of Glucose in blood decreased.
B) The level of Glucose in blood increased.
C) Got hurt in the head.
D) She is acting.
Answer:
C) Got hurt in the head.

Concept – 2 : Taste and Smell are Closely Related

Question 15.
Who discovered the relation of lunch bell and water mouthing ?
A) Head Master
B) Ivan Pavlov
C) Flemming
D) Engleman
Answer:
B) Ivan Pavlov

Question 16.
Consider the following.
a) Taste and smell are related with each other
b) The sense organs which detect taste and smell work with each other
A) Both a & b are true
B) a is true, b is false
C) b is true, a is false
D) Both a ‘& b are false
Answer:
A) Both a & b are true

Question 17.
The receptors which send the signals of smell to brain ………………
A) Chemo receptors
B) Olfactory receptors
C) Auditory receptors
D) Optic receptors
Answer:
B) Olfactory receptors

Question 18.
Who conducted experiments on conditional reflexes ?
A) Thorndaike
B) Charles Laveran
C) Ivan Holy Fied
D) Ivan Pavlov
Answer:
D) Ivan Pavlov

Question 19.
The papillae which are at the end of tongue are ……………………
A) Villate papillae
B) Folliate papillae
C) Fungi form papillae
D) Taste receptors
Answer:
C) Fungi form papillae

Question 20.
The recognition of taste is done by the ……………… cells present in the taste buds
on the tongue.
A) Secretive cells
B) Receptor cells
C) Taste buds
D) Olfactory receptors
Answer:
B) Receptor cells

Question 21.
Tongue is a taste receptor. Which nerve helps to identify the taste?
A) 6th cranial nerve
B) 5th cranial nerve
C) 10th cranial nerve
D) optic nerve
Answer:
B) 5th cranial nerve

Concept – 3 : Taste connects the tongue and the Palate

Question 22.
In which of the following situations you can taste quickly ?
A) Put sugar crystals on tongue
B) Put sugar solution on tongue
C) Press the tongue slowly against the palate
D) Swallow directly without grinding and shredding
Answer:
C) Press the tongue slowly against the palate

Question 23.
Find out the wrong in the flow chart.

A) 1
B) 2
C) 3
D) 4
Answer:
C) 3

Question 24.
The following diagram shows papillae on tongue. The correct labelling of parts i, ii and iii is :

A) i – villate papillae, ii – foliate papillae, iii- fungi form papillae
B) i – foliate papillae, ii – villate papillae, iii – fungi form papillae
C) i – villate papillae, ii – fungi papillae, iii – foliate papillae
D) i – fungi papillae, ii – villate papillae, iii – foliate form papillae
Answer:
A) i – villate papillae, ii – foliate papillae, iii- fungi form papillae

Question 25.
Any food substance when placed on the P gets dissolved in the Q secreted by R in the mouth.
Find out the parts P, Q & R
A) P – salivary glands, Q – saliva, R – mouth
B) P – mouth, Q – salivary glands, R – saliva
C) P – mouth, Q – salivary glands, R – saliva
D) P – saliva, Q – salivary glands, R – mouth
Answer:
D) P – saliva, Q – salivary glands, R – mouth

Concept – 4 : Mouth -The Munching Machine

Question 26.
The long teeth present in carnivores are …………………
A) Incisors
B) Canines
C) Molars
D) Premolars
Answer:
B) Canines

Question 27.
Human dental formula is ………………….
A) 2/2, 1/1, 2/2, 1/2
B) 2/2, 1/1, 1/1, 2/2
C) 2/2, 2/2, 1/1, 1/1
D) 2/2, 1/1, 2/2, 3/3
Answer:
D) 2/2, 1/1, 2/2, 3/3

Question 28.
The teeth which are used for tearing the food are
A) Incisors
B) Molars
C) Canines
D) Premolars
Answer:
C) Canines

Question 29.
The teeth which are useful for grinding the food are
A) Incisors
B) Molars
C) Canines
D) Premolars
Answer:
B) Molars

Question 30.
Janani wrote the dental formula like this 2/2, 1/1, V2,2/2. Which teeth lacked in this ?
A) Premolars
B) Incisors
C) Canine
D) Molars
Answer:
D) Molars

Question 31.
The nerve which controls the inner muscles of jaw …………………..
A) 10^th Cranial nerve
B) 9^th Cranial nerve
C) 5^th Cranial nerve
D) 1^st Cranial nerve
Answer:
C) 5^th Cranial nerve

Question 32.
Observe the following a, b statements.
a) Teeth help in chewing, and grinding the food.
b) Tongue mixes the food with saliva and spreads out the food evenly in the oral cavity.
A) a, b both are true
B) a is true, b is false
C) a is false, b is true
D) a, b both are false
Answer:
A) a, b both are true

Question 33.
The type of teeth used to tear a sugarcane
A) Incisors
B) Canines
C) Premolars
D) Molars
Answer:
B) Canines

Question 34.
You were given two pieces of chalk. To prove the activity on breaking of food material one of the following is used.
A) Sulphuric acid
B) Acetaldehyde
C) Formic acid
D) Vinegar
Answer:
D) Vinegar

Question 35.
Which nerve controls the movement of jaw ?
A) 6^th cranial nerve
B) 5^th cranial nerve
C) 7^th cranial nerve
D) 8^th cranial nerve
Answer:
B) 5^th cranial nerve

Question 36.
The muscle that helps the mouth enable the food to be pushed into oral cavity are
A) Pharyngeal muscles
B) Longitudinal muscles
C) Circular muscles
D) Sphincter muscles
Answer:
D) Sphincter muscles

Question 37.
The jaw muscles of mouth help in biting and chewing actions, and move the jaw up down, forward and backward during food mastication
A) Surface muscles
B) Longitudinal muscles
C) Circular muscles
D) Short muscles
Answer:
A) Surface muscles

Question 38.
a – Incisors have sharp edge, canines have sharp and pointed edges,
b – Molars and premolars are blunt and flat.
A) Both a and b are false
B) a is true, b is false
C) b is true a is false
D) Both a and b are true
Answer:
D) Both a and b are true

Concept – 5 : Importance of Saliva

Question 39.
The enzyme present in saliva :
A) Ptyalin
B) Pepsin
C) Trypsin
D) Lipase
Answer:
A) Ptyalin

Question 40.
If the pH value of a solution is below 7 then it is ………………
A) Acidic
B) Alkaline
C) Neutral
D) Salt
Answer:
A) Acidic

Question 41.
The apparatus used for action of saliva on carbohydrates
i) Test tube
ii) Starch powder
iii) Iodine
iv) Watch glass
A) i & ii only
B) ii & iii only
C) iii only
D) All are correct
Answer:
D) All are correct

Question 42.
Litmus test on our tongue gives the following range of colour
A) 1 – 4
B) 2 – 13
C) 10 – 14
D) 7 only
Answer:
D) 7 only

Question 43.
Consider the following.
a. Saliva has an important hormone
b. 1 -1.5 litres of saliva is secreted per day
A) Both a & b are true
B) a is true, b is false
C) a is false, b is true
D) Both a & b are false
Answer:
C) a is false, b is true

Question 44.
pH tests reveal
A) Acidic, basic conditions
B) Only acidic conditions
C) Only basic conditions
D) Acidic, basic, neutral conditions
Answer:
D) Acidic, basic, neutral conditions

Question 45.
The animals which are active during day time, take rest at night time are called
A) Nocturnals
B) Amphibians
C) Protozoans
D) Diurnals
Answer:
D) Diurnals

Question 46.
The animals which are active during night time and collect food are called
A) Nocturnals
B) Amphibians
C) Sponges
D) Diurnals
Answer:
A) Nocturnals

Question 47.
If saliva is lacking the salivary amylase, which of the following process in the buccal cavity will be affected ?
A) Breakdown of proteins into amino acids
B) Breakdown of starch into sugars
C) Breakdown of fats into fatty acids and glycerol
D) Breakdown of cells in intestinal layer
Answer:
B) Breakdown of starch into sugars

Question 48.
The saliva secretion in human is under the control of:
A) Central nervous system
B) Peripheral nervous system
C) Autonomous nervous system
D) All the above
Answer:
C) Autonomous nervous system

Question 49.
The number of salivary glands present in the mouth.
A) 5 pairs
B) 3 pairs
C) 4 pairs
D) 2 pairs
Answer:
B) 3 pairs

Question 50.
Saliva secreted by us per day is …………………
A) 1 – 1.5 liters
B) 2 – 2.25 liters
C) 1 – 1.25 liters
D) 1.75 liters
Answer:
A) 1 – 1.5 liters

Concept – 6 : Travel of food through Oesophagus

Question 51.
The process which occurs to push the food into the alimentary canal in man is ……………………
A) Mastication
B) Chewing
C) Swallowing
D) Mixing
Answer:
C) Swallowing

Question 52.
The slippery secretion which is secreted by the walls of oesophagus
A) Peristalsis
B) Bolus
C) Chyme
D) Mucus
Answer:
D) Mucus

Question 53.
Observe the picture :

What is the function of “Muscle contraction” ?
A) smooth muscle relaxation
B) starts digestion
C) prevents backward movement of bolus
D) smooth pushing of bolus downwards
Answer:
D) smooth pushing of bolus downwards

Question 54.
Which of the following is not correct one regarding oesophagus ?
A) Oesophagus comprises two smooth layers.
B) Inner layer comprises vcircular muscles.
C) Outer layer comprises longitudinal muscles.
D) Oesophagus is easily folded.
Answer:
D) Oesophagus is easily folded.

Question 55.
Peristalsis is …………… action.
A) Voluntary
B) Involuntary
C) Voluntary – involuntary
D) Motivated
Answer:
B) Involuntary

Question 56.
The given picture depicts

A) The peristaltic movement of food
B) The structure of oesophagus
C) Various reactions in stomach
D) Peristaltic movement in stomach
Answer:
A) The peristaltic movement of food

Question 57.
Find the correct statement regarding the experiment done for proving “crushing of chalkpiece due to vinegar in ‘ beaker”.
A) To show crushing of chalkpiece by vinegar
B) Food is digested very fast only after breaking into pieces
C) Vinegar is needed to digest the food
D) Vinegar is added to food without breaking
Answer:
B) Food is digested very fast only after breaking into pieces

Concept – 7 : Stomach – The mixer and grinder

Question 58.
The direction of peristaltic movement is
A) only clockwise
B) only anti-clockwise
C) both clockwise and anti-clockwise
D) single direction only
Answer:
C) both clockwise and anti-clockwise

Question 59.
Due to the clockwise movement of peristalsis, the food bolus
A) moves forward
B) moves backward
C) remains stable
D) oscillates back and front
Answer:
A) moves forward

Question 60.
Sphincter that helps in opening of stomach into duodenum.
A) Cardiac
B) Pyloric
C) Anal
D) Gastric
Answer:
B) Pyloric

Question 61.
When does peristalsis occur in anti-clockwise ?
A) When bolus moves forward
B) When we drink water
C) When vomiting
D) When we are in fasting.
Answer:
C) When vomiting

Question 62.
Mohan took lunch at 1 o’ clock. How much time does it take to digest 100%?
A) 2 – 5 hours
B) 2 – 3 hours
C) 4 – 7 hours
D) 4 – 5 hours
Answer:
D) 4 – 5 hours

Question 63.
The food turns into a smooth porridge like consistency called chyme. This is formed in ………………
A) Oesophagus
B) Stomach
C) Liver
D) Small Intestine
Answer:
B) Stomach

Question 64.
a) While ruminating, food bolus moves from stomach to mouth,
b) In the cow, peristalsis occurs in clock-wise direction.
A) a and b both are true
B) a is true, b is false
C) a is false, b is true
Answer:
B) a is true, b is false

Question 65.
Suma said that peristalsis involves the contraction of the muscle behind the food. Uma said that during peristalsis relaxation of the muscle in front of the food gives rise to a thrust that pushes the food.
A) Suma is correct
B) Uma is correct
C) Both are wrong
D) Both are right
Answer:
D) Both are right

Question 66.
In which of the following peristaltic movements occur ?
1) Large intestine to rectum
2) Stomach to liver
3) Stomach to small intestine
4) Large intestine to small intestine.
A) 1, 2
B) 2, 3
C) 1, 3
D) 1, 4
Answer:
C) 1, 3

Question 67.
What can you prove by the experiment in leaves with jelly ?
A) Smell receptors in nose
B) Mucus on the inner wall of stomach
C) Acidity of food
D) Observing taste buds
Answer:
B) Mucus on the inner wall of stomach

Question 68.
Bolus : Oral Cavity :: Chyme : …………………
A) Oesophagus
B) Stomach
C) Small intestine
D) Large intestine
Answer:
B) Stomach

Question 69.
Peristalsis is
A) contraction of longitudinal muscles
B) contraction of circular muscles
C) under control of autonomous nervous system
D) relaxation of circular muscles
Answer:
C) under control of autonomous nervous system

Question 70.
The acid that comes out from the stomach is called
A) Belching
B) Vomit
C) Gas
D) Burning Sensation
Answer:
A) Belching

Question 71.
In the stomach, the food is digested to smooth mixture called chyme. But it is not affected by the acid. The reason is
A) Alkaline state of chyme
B) Chyme is a hard material
C) The mucus present in the walls of stomach
D) The enzymes in digestive juices
Answer:
C) The mucus present in the walls of stomach

Question 72.
This is secreted in the stomach.
A) H₂SO₄
B) HNO₃
C) HCl
D) NaOH
Answer:
C) HCl

Question 73.
If the chyme is pushed backwards in small quantity, then it reaches to ………………
A) Oesophagus
B) Small intestive
C) Duodenum
D) Digestion
Answer:
C) Duodenum

Question 74.
Reverse peristalsis is seen in
A) Tiger
B) Squirrel
C) Cow
D) Cat
Answer:
C) Cow

Question 75.
Example for the reflexes in stomach is …………………..
A) Peristaltic movement
B) Assimilation
C) Vomiting
D) Digestion
Answer:
C) Vomiting

Question 76.
Small amounts of chyme is pushed into the duodenum, simultaneously forcing most of it back into the stomach is called retropulsion.
Find the correct illustration for above information.

Answer:

Question 77.
Churning of food is done by
A) Canine
B) incisor
C) A & B
D) Molars
Answer:
D) Molars

Question 78.

The destiny of food in the given picture
A) From stomach to oesophagus
B) From oesophagus
C) From small intestine to large intestine
D) From stomach to duodenum
Answer:
D) From stomach to duodenum

Question 79.
In human digestive system, the enzymes pepsin and trypsin are respectively secreted by:
A) Pancreas and liver
B) Stomach and salivary glands
C) Pancrease and gall bladder
D) Stomach and pancreas
Answer:
D) Stomach and pancreas

Question 80.
Name the arrow part of the diagram.

A) Oesophagus
B) Duodenum
C) Stomach
D) Appendix
Answer:
B) Duodenum

Question 81.
Manju suffered from vomitings soon after having breakfast. Why ?
A) Unknown disease
B) Food is unpalatable
C) Food poisoning
D) Pain in throat
Answer:
C) Food poisoning

Question 82.
Ravi has the habit of hurrying over meals. What may happen to him ?
A) He may get indigestion problem
B) He may get stomach and duodenal ulcers
C) Both A and B
D) He may have good digestion
Answer:
C) Both A and B

Question 83.
Which one of the following is the correct order of peristalsis in human digestive system ?
A) Grinding → Propulsion → Retropulsion
B) Retropulsion → Grinding → Propulsion
C) Propulsion → Retropulsion → Grinding
D) Propulsion → Grinding → Retropulsion
Answer:
D) Propulsion → Grinding → Retropulsion

Question 84.
Which of the following correctly represents the three parts of stomach ?

Answer:

Question 85.
Protein digestion starts in :
A) Rectum
B) Stomach
C) Gut
D) Colon
Answer:
B) Stomach

Concept – 8 : Travel of Food from the Stomach to the Intestine

Question 86.
The tank like structure which stores stool in large intestine is ………………
A) the right side of colon
B) the left side of tolon
C) rectum
D) anus
Answer:
B) the left side of tolon

Question 87.
The number of sphincter muscles present in anus ………………..
A) 1
B) 3
C) 2
D) 6
Answer:
C) 2

Question 88.
The bad smelled faecal mass waste which is stored in rectum is ……………….
A) Urine
B) Stool
C) Ammonia
D) Urea
Answer:
B) Stool

Question 89.
The inner sphincter in anus works under ………………. control.
A) voluntary
B) involuntary
C) motivated
D) voluntary – involuntary.
Answer:
D) voluntary – involuntary.

Question 90.
If there are no villi in the small intestine, what may happen ?
A) Absorption surface of the intestine decreases
B) Food never gets digested properly
C) Both A and B
D) None of the above
Answer:
B) Food never gets digested properly

Question 91.
Human being is an internal combustion machine because of
A) assimilation of energy from food
B) liberate CO₂ during respiration
C) expel waste food at the end state digestion
D) secrete powerful digestive juices
Answer:
B) liberate CO₂ during respiration

Question 92.
……………….. joins the oesophagus with small intestine.
A) Pharynx
B) Stomach
C) Small intestine
D) Liver
Answer:
B) Stomach

Question 93.
Which of the following is not secreted in digestive system?
A) Secretin
B) Adrenalin
C) Cholecystokinin
D) Leptin
Answer:
B) Adrenalin

Question 94.
The muscle present at the opening of the stomach and first part of the small intestine is ………………
A) Smooth muscle
B) Circular muscle
C) Longitudinal muscle
D) Pyloric sphincter
Answer:
B) Circular muscle

Question 95.
Glucose and amino acids are absorbed through the following part of villus
A) Epithelial cells
B) Blood capillary
C) Lymphatic vessel
D) All
Answer:
D) All

Question 96.
Enteric nervous system is called second brain. But it doesn’t perform …………………..
A) A role in determination of disease
B) Intelligence
C) Hunger signals
D) Mental status
Answer:
B) Intelligence

Question 97.
Succus entericus is the name given to :
A) Junction between ileum and large intestine
B) Intestinal juice
C) Swelling in the gut
D) Gastric juice
Answer:
B) Intestinal juice

Question 98.
Which of the following system co-ordinates with digestive system ?
i) Circulatory system
ii) Nervous system
iii) Skeletal system
iv) Reproductive system
A) i and iii
B) i and ii
C) ii and iii
D) i and iv
Answer:
B) i and ii

Question 99.
Microvilli are present in ‘P’ and they work as Q. The ‘P’ and ‘Q’ are
A) P = intestine, Q = Absorber of nutrients into organs
B) P = Absorber of nutrients, Q = Intestine
C) P = Small intestine, Q = Absorber of nutrients into blood
D) All of these
Answer:
C) P = Small intestine, Q = Absorber of nutrients into blood

Question 100.
Consider the following.
a) Second brain has 100 million neurons
b) Second brain has neurons twice to that of neurons in spinal cord.
A) Both a & b are true
B) a is true, b is false
C) a is false, b is true
D) Both a & b are false
Answer:
A) Both a & b are true

Question 101.
A. In all the body systems, the brain is so important.
R. Brain co-ordinates all the systems.
A) A and R both are correct. R is the correct explanation to A .
B) A is correct R is wrong.
C) A is wrong R is correct.
D) A and R both are wrong.
Answer:
A) A and R both are correct. R is the correct explanation to A .

Question 102.
a) We breathe air through inspiration and expiration. It is an involuntary action.
b) Medulla oblongata controls inhalation and exhalation.
A) a, b both are true
B) a is true, b is false
C) a is false, b is true
D) a, b both are false
Answer:
A) a, b both are true

Question 103.
Find out the correct pair in the given table.

Location of sphincters	Place of food to which enters
1. Oesophagus	Stomach
2. Pyloric stomach	Large intestine
3. Anus	Defecation

A) 1 only
C) 1, 3
B) 2 only
D) 2, 3
Answer:
C) 1, 3

Question 104.
A person took spoiled food. This would happen in him.
A) Vomiting sensation
B) Belching
C) Burning in chest and throat
D) All the above
Answer:
A) Vomiting sensation

Question 105.
Identify the function of part ‘A’ in the below given diagram.

A) Reabsorption of water from the faeces
B) Completes the digestion of food materials
C) Generating contractions
D) Storage of waste hard mass
Answer:
A) Reabsorption of water from the faeces

Question 106.
Name this structure of the human body.

A) Nerve ending
B) Villi
C) Tongue
D) Nephron
Answer:
B) Villi

Question 107.
This is nicknamed as ‘second brain’
A) Nerves associated with lungs
B) Nerves associated with digestive tract
C) Nerves associated with kidney
D) Nerves associated with heart
Answer:
B) Nerves associated with digestive tract