Tag: human lymphatic system
Questions Related to human lymphatic system
Splenic artery arises from
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Anterior mesenteric artery
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Coeliac artery
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Posterior mesenteric artery
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Intestinal artery
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.
Solid substances constitute ____ % of the non-cellular part of lymph.
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$34$%
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$6$%
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$12$%
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$82$%
Non-cellular part; water - 94%
Solids (proteins, fats, carbohydrates, enzymes, antibodies etc) - 6%.
Choose the correct answer from the alternatives given.
The lymph consists of:
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plasma
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leucocytes
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plasma and leucocytes
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plasma and erythrocytes
- 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.
Which is NOT the function of lymph?
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Transport R.B.C.s
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Drain excess tissue fluid
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Transport lymphocyte and antibodies
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Transport absorbed fat
What would happen if fangs of venomous snake are pulled out ? They will
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Get replaced
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Become double
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Be safe to handle
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Never get replaced
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.
Premolar are absent in
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Adult teeth in man
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Mammalian teeth in general
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Permanent teeth of man
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Deciduous teeth of man
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.
Hyperbilirubinemia is
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Increased bilirubin in blood
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Increased bilirubin in urine
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Reduced concentration of blood bilirubin
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Reduced bilirubin in urine
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.
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
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Heterodont, thecodont and diphyodont
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Thecodont, heterodont and diphyodont
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Diphyodont, thecodont and heterodont
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Heterodont, diphyodont and thecodont
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Thecodont, diphyodont and heterodont
Number of teeth which are monophyodont in man are
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4
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22
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32
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12
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.
The hardest constituent of the tooth is
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Enamel
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Dentine
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Bone
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Pulp
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.