Tag: the muscular system and digestive system in human beings

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Questions Related to the muscular system and digestive system in human beings

Multiple choice evs the muscular system and digestive system in human beings human muscular system closer look into muscular system muscles and its types

In a normal human adult male, the total weight of muscle is

  1. 10 kg

  2. 20 kg

  3. 30 kg

  4. 50 kg
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • In a normal human adult male, the total weight of muscle is 30 kg.
  • Muscle mass is important in determining healthy body composition. A person with a higher % of muscle mass finds it easier to move but needs more energy to do it. 
  • The normal muscle mass percentage on the bodyweight lies between 38% and 54% for men and between 28% and 39% for women depending on age and physical activity level.

    Hence, option C is the answer.
Multiple choice evs the muscular system and digestive system in human beings human muscular system closer look into muscular system muscles and its types

State whether the following statements are true or false.
Involuntary muscles have no myosin or actin since they lack striations.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Skeletal muscle is composed of muscle fibres which have smaller units called myofibrils. There are three types of proteins make up each myofibril; they are contractile, regulatory and structural proteins. By contractile proteins, we mean actin (thin filament) and myosin (thick filament).

So, the correct option is 'False'.

Multiple choice evs the muscular system and digestive system in human beings human muscular system closer look into muscular system muscles and its types

Long distance, competitive runners are usually small and why and run more slowly than sprinters, who run much shorter distances and generally have a large bulk of muscles. Which of the following best explains the differences between the two types of runners.

  1. Long distance runners run more slowly because lactic acid quickly builds up in their muscles and causes fatigue. Sprinters do not run for a long enough for lactic acid to build up in their muscles.

  2. The large muscles of sprinters Increases the oxygen supply to each muscle, preventing lactic acid from forming.

  3. Sprinters do not run for long enough for sufficient lactic acid to build up in thek muscles therefore they can have large muscles for more power. By being lighter and running more slowly long distance runners ensure that their muscles receive enough oxygen for aerobic respiration.

  4. Sprinters run faster because their large muscles have more blood running through them to stop anaerobic respiration from taking place. Long distance runners run nine slowly because they ate using the energy from anaerobic respiration, which does not produce as much ATP as aerobic respiration.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

When there is oxygen deficiency in the muscle cells, they undergo anaerobic respiration and start producing lactic acid. This lactic acid causes muscle fatigue. The muscle that has been contracted many times short intervals, exhaust its storage of ATP and glycogen and produces lactic acid. 

The runners that run for larger distances need slow twitch muscles so that the oxygen supply does not get exhausted and sustain their long run. The lactic acid will cause fatigue and lead to the collapse of the muscles. 
On the other hand, the sprinters that run for a short duration of time, want faster consumption of oxygen because they do not have to run for the longer amount of time and larger distance so they can where the lactic acid accumulation as it won't affect the performance.
So, the correct option is 'Long distance runners run more slowly because lactic acid quickly builds up in their muscles and causes fatigue. Sprinters do not run for a long enough for lactic acid to build up in their muscles.'

Multiple choice biology the muscular system and digestive system in human beings human muscular system closer look into muscular system muscles and its types

Biceps muscles connect humerous with the ________

  1. Radius, ulna

  2. Scapula

  3. Pectoral girdle

  4. Skull
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The biceps, also known as biceps brachii lies on the front of the upper arm between the shoulder and the elbow. The biceps brachii has two heads, or origins. Both heads originate on the scapula. The long head attaches to the supraglenoid tubercle of the scapula, which is just above the space where the humerus, or upper arm, enters the shoulder. The short head attaches to the coracoid process of the scapula. Both heads converge into one muscle, that runs the length of the humerus. The biceps brachii crosses the inside of the elbow and attaches at the radial tuberosity, which is a feature on the radius - one of the two bones (Ulna is other bone) in- the lower arm. In this way it attaches humerus with the radius and ulna. 

So, the correct option is 'Radius, ulna'.

Multiple choice biology the muscular system and digestive system in human beings human muscular system closer look into muscular system muscles and its types

Muscle is responsible for ____________. 

  1. Immunity

  2. Locomotion

  3. Respiration

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Muscles function is to produce force and motion. They are primarily responsible for maintaining and changing posture, locomotion, as well as movement of internal organs, such as the contraction of the heart and the movement of food through the digestive system via peristalsis. Therefore, (b) is the correct answer. 

Multiple choice evs digestion of food types of ecological pyramids the muscular system and digestive system in human beings introduction to human digestive system

Find the odd out and state category of rest ;

  1. Thymine, Cytosine, Adenine, Pepsin

  2. Cortisone , Somatotropin, Adrenocorticotropic hormone, Vasopressin

  3. Cerebrum, Cerebellum, Thalamus, Hypothalamus

  4. Urea, Creatinine, Ammonia, Uric acid

  5. Neutrophils, Eosinophils, Basophils, Lymphocytes
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

(A)Pepsin is not a nitrogenous base.

(B)Cortisone, Somatotropin, Adrenocorticotropic, Vasopressin are all hormones.
(C)Cerebrum, Cerebellum, Thalamus, Hypothalamus are all parts of the brain.
(D)Urea, Creatinine, Ammonium, Uric acid are all nitrogen-based products.
(E)Neutrophils, Eosinophils, Basophils, Lymphocytes are all compounds of blood cells.
Thus, the correct answer is 'Thymine, Cytosine, Adenine, Pepsin.'

Multiple choice evs digestion of food types of ecological pyramids the muscular system and digestive system in human beings introduction to human digestive system

The undigested, semisolid food is called 

  1. Anus

  2. Faeces

  3. Rectum

  4. Villi
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • The human digestive system consists of a long muscular tube and several accessory organs such as the salivary glands, pancreas and gall bladder.
  •  It is responsible for food ingestion and digestion, absorption of digestion products and the elimination of undigested materials. 
  • Undigested semi-solid food remaining in the large intestine is called faeces which are eliminated through the anus.
Hence, The undigested, semisolid food is called faeces.
So, the correct answer is 'faeces'.
Multiple choice evs digestion of food types of ecological pyramids the muscular system and digestive system in human beings introduction to human digestive system

The longest part of the alimentary canal is 

  1. Oesophagus

  2. Large intestine

  3. Small intestine

  4. Stomach
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

  • The alimentary canal includes the mouth, pharynx, oesophagus, stomach, small intestine, large intestine, and anus.
  • The longest part of the alimentary canal is small intestine because it is the main organ of absorption and digestion of food. 
  • The surface area of the small intestine gets increased because of the presence of villi which gives food plenty of time to break down properly. Hence, the longest part of the alimentary canal is a small intestine.  
So, the correct answer is 'Small intestine'.

Multiple choice evs digestion of food types of ecological pyramids the muscular system and digestive system in human beings introduction to human digestive system

Stomach secretes

  1. Dilute hydrochloric acid

  2. Dilute sulphuric acid

  3. Dilute citric acid

  4. Dilute nitric acid
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • Parietal cells in the stomach contain an extensive secretory network from which the dilute hydrochloric acid is secreted into the lumen of the stomach.
  •  This dilute Hydrochloric acid activates pepsinogen into the enzyme pepsin, which then helps digestion by breaking the bonds linking amino acids, a process known as proteolysis. Hence, Stomach secretes Dilute hydrochloric acid'
So, the correct answer is 'Dilute hydrochloric acid'.
Multiple choice evs digestion of food types of ecological pyramids the muscular system and digestive system in human beings introduction to human digestive system

Bile is secreted by 

  1. Stomach

  2. Small intestine

  3. Pancreas

  4. Liver
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

  • Bile  is a dark green to yellowish brown fluid, produced by the liver of most vertebrates, that helps in the digestion of lipids in the small intestine.
  •  In humans, bile is produced continuously by the liver, and stored and concentrated in the gallbladder. Hence, Bile is secreted by the liver.
So, the correct answer is 'liver'.