Tag: human lymphatic system

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Multiple choice biology soldiers of defense human lymphatic system lymph and its function lymph and tissue fluid

Splenic artery arises from 

  1. Anterior mesenteric artery

  2. Coeliac artery

  3. Posterior mesenteric artery

  4. Intestinal artery
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The splenic artery supplying the organ spleen is the branch of the coeliac artery which itself is a branch of the abdominal aorta. The abdominal aorta is a branch of dorsal aorta/systemic aorta.

Dorsal aorta > Abdominal segmental aorta > Coeliac artery > Splenic artery.
So, the correct answer to the question is 'Coeliac artery'.

Multiple choice biology soldiers of defense human lymphatic system lymph and its function lymph and tissue fluid

Choose the correct answer from the alternatives given.
The lymph consists of:

  1. plasma

  2. leucocytes

  3. plasma and leucocytes

  4. plasma and erythrocytes
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

  • Lymph is a fluid which flows through the lymphatic system of the body and takes part in transportation. Lymph is formed by the seepage of blood plasma, proteins, and few blood cells through the pores of capillaries.
  • Lymph transports protein, fats and other nutrients from the digestive system. Lymph also collects bacteria and other pathogens from the bloodstream and brings to the lymph nodes to destroy them. Lymph mainly contains blood plasma with some white blood cells.
So, the correct option is 'Plasma and leucocytes'.

Multiple choice biology soldiers of defense human lymphatic system lymph and its function lymph and tissue fluid

Which is NOT the function of lymph?

  1. Transport R.B.C.s

  2. Drain excess tissue fluid

  3. Transport lymphocyte and antibodies

  4. Transport absorbed fat
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Lymph is a clear fluid that does NOT transport red blood cells (RBCs). The actual functions of lymph include: draining excess tissue fluid from intercellular spaces, transporting lymphocytes and antibodies for immune function, and transporting absorbed dietary fats from the small intestine via lacteals. Option A is the correct answer as it is NOT a lymph function.

Multiple choice evs - i busy at work - our internal organs human lymphatic system lymph and its function lymph and tissue fluid experiments on digestive enzymes role of receptors in the mouth types of teeth introduction to human digestive system circulatory system and organs

What would happen if fangs of venomous snake are pulled out ? They will

  1. Get replaced

  2. Become double

  3. Be safe to handle

  4. Never get replaced
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In general teeth of reptiles (except crocodile) are acrodont. Thus, teeth are fixed over bone and not embedded in sockets in jaws. The fangs of snakes are modified maxillary teeth of upper jaw. If pulled out these teeth can be replaced.

Multiple choice evs - i busy at work - our internal organs human lymphatic system lymph and its function lymph and tissue fluid experiments on digestive enzymes role of receptors in the mouth types of teeth introduction to human digestive system circulatory system and organs

Premolar are absent in 

  1. Adult teeth in man

  2. Mammalian teeth in general

  3. Permanent teeth of man

  4. Deciduous teeth of man
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Humans have two sets of teeth- the deciduous or milk teeth and the permanent teeth. The milk premolars are absent in infants. Thus, dental formula of infants are 2102/ 2102 as against 2123/ 2123 in adult humans.

Multiple choice evs - i busy at work - our internal organs human lymphatic system lymph and its function lymph and tissue fluid

Hyperbilirubinemia is

  1. Increased bilirubin in blood

  2. Increased bilirubin in urine

  3. Reduced concentration of blood bilirubin

  4. Reduced bilirubin in urine
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Hyperbilirubinemia is excessive bilirubin in blood. It is also called jaundice. It leads to deposition of bilirubin in mucous membrane, sclera and skin so that the patient looks yellow or icterus. Urine is yellow. It is caused by obstruction in bile duct, excessive hemolysis, or viral infection.

Multiple choice evs - i busy at work - our internal organs human lymphatic system lymph and its function lymph and tissue fluid experiments on digestive enzymes role of receptors in the mouth types of teeth introduction to human digestive system circulatory system and organs

In mammals, the teeth are 
(i) Of different types
(ii) Embedded in the cup-like socket of the jaw bones
(iii) Only two sets, present throughout life
These conditions are referred as 

  1. Heterodont, thecodont and diphyodont

  2. Thecodont, heterodont and diphyodont

  3. Diphyodont, thecodont and heterodont

  4. Heterodont, diphyodont and thecodont

  5. Thecodont, diphyodont and heterodont
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
In mammals, the teeth is a heterodont as they have for different variety of teeth like incisors, canines, premolars and molars. The teeth is embedded in the sockets so they are also known as thecodont. Initially mammals have milk teeth, which is further replaced by the milk teeth. The two sets of teeth is known as diphyodont.
So, the correct answer is option A.
Multiple choice evs - i busy at work - our internal organs human lymphatic system lymph and its function lymph and tissue fluid experiments on digestive enzymes role of receptors in the mouth types of teeth introduction to human digestive system circulatory system and organs

Number of teeth  which are monophyodont in man are

  1. 4

  2. 22

  3. 32

  4. 12
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Majority of mammals including human being forms two sets of teeth during their life, a set of temporary, milk or deciduous teeth replaced by a set of permanent or adult teeth. This type of dentition is called diphyodont. An adult human has 32 permanent teeth, which are of four different types, namely, incisors (I), canine (C), premolars (PM) and molars(M). Arrangement of teeth in each half of the upper and lower jaw in the order I, C, PM, M is represented by a dental formula which in humanis 2123/ 2123. In children the premolars and last molar are absent. Hence the child has dental formula 2102/ 2102. The number of teeths according to this dental formula will be 20. These teeth will be diphyodont and (32-20) or 12 teeth will be monophyodont.

Multiple choice evs - i busy at work - our internal organs human lymphatic system lymph and its function lymph and tissue fluid experiments on digestive enzymes role of receptors in the mouth types of teeth introduction to human digestive system circulatory system and organs

The hardest constituent of the tooth is

  1. Enamel

  2. Dentine

  3. Bone

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

Enamel is the hardest substance in the human body and contains the highest percentage of minerals, 96%, with water and organic material. The primary mineral is hydroxyapatite, which is a crystalline calcium phosphate.