Biology

Human Physiology and Anatomy

2,062 Questions

Human physiology and anatomy explore the structural organization and biological functions of the human body and its systems. Questions focus on the primary roles of organs, hormones, cellular components, and developmental processes. These fundamentals are integral to medical entrance tests and general science sections.

Organ functionsHormone functionsImmune system rolesDigestive systemCellular functions

Human Physiology and Anatomy Questions

Multiple choice bio-chemistry nervous system of man introduction to brain body fluid central nervous system

The function of cerebrospinal fluid does not include

  1. Protection of brain and spinal cord by containing antibody

  2. Protection of delicate brain and spinal cord from shock

  3. As a medium for excretion of waste product

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

The primary function of CSF is to cushion the brain within the skull and serve as a shock absorber for the central nervous system. CSF also circulates nutrients and chemicals filtered from the blood and removes waste products from the brain.

Multiple choice bio-chemistry nervous system of man introduction to brain body fluid central nervous system

The function of cerebrospinal fluid surrounding CNS is to 

  1. Protect the brain from external jerks
  2. Provide nourishment and ${O _2}$ to the brain

  3. Take away unwanted substance from the brain

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Cerebrospinal fluid (CSF) acts as a shock absorber to protect the CNS from mechanical injury. It also facilitates the exchange of nutrients and metabolic waste products between the blood and the brain tissue.

Multiple choice bio-chemistry nervous system of man introduction to brain body fluid central nervous system

The main function of cerebrospinal fluid is

  1. Nourishment of brain and spinal cord

  2. Functioning as cushion against shocks

  3. Keeping the central nervous system moist

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The cavities of the central nervous system are called the ventricles that are lined with the choroid plexus. The choroid plexus is made up of the inserted piamater, blood vessels, the ependymal cells. It is responsible for the formation of the formation of the extracellular fluid called the cerebrospinal fluid which drains the ventricles of the brain and spinal cord. The CSF is responsible for collecting the waste from the interstitial space, distribution of nutrients to the brain and spinal cord, act as shock collector during injuries and moistening of the central nervous system.

Hence, the correct answer is 'All of the above'

Multiple choice bio-chemistry nervous system of man introduction to brain body fluid central nervous system

The function of choroid plexus is

  1. To produce lymph

  2. To produce blood

  3. To produce cerebrospinal fluid

  4. To produce endolymph
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The choroid plexus is made up of the piamater that is merged into the ventricles, blood capillaries and the ependymal cells that are epithelial cells. The ventricles of the brain contain the choroid plexus. Its function is to produce the cerebrospinal fluid (CSF). The CSF flows from the ventricles into the subarachnoid space through the Foramen of Magendie and Foramen of Luschka. Here it is absorbed by the arachnoid villi and secreted into the cranial venous sinus. From the cranial venous sinus, the CSF enters the blood circulation.

Hence, the correct answer is 'To produce cerebrospinal fluid'

Multiple choice evs - i constituents of food dietary sources of proteins types of nutrients calorific value of nutrients

Functions that are not normally performed by proteins is/are

  1. Hydrolysis for energy provision.

  2. Structural integrity of the cell.

  3. Regulation of metabolism.

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

Proteins are the most important and versatile biomolecules in living systems. They are involved in general body-building, catalytic role as enzymes, and body defence in immunological reactions. Energy currency of living systems are usually nucleotides like ATP. They are hydrolysed to provide energy as and when required.

Multiple choice zoology immunity cells of immune system cells in immune system lymphocytes and lymph

Choose correct alternative in the following statements:
Function of WBCs is to

  1. Transport oxygen

  2. Help in clotting of blood

  3. Provide immunity

  4. Provide storage of food
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
White blood cells, also known as leucocytes are components of the formed elements of human blood. They are of two categories: agranulocytes and granulocytes. Their major function is to provide immunity.
So, the correct answer is, 'Provide immunity.'
Multiple choice zoology excretion to maintain homeostasis other excretory organ role of other organs in excretion accessory excretory organs excretion in other organisms

Primary function of sweat glands is

  1. Thermoregulation

  2. Excretion

  3. Osmoregulation

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

Sweat glands are coiled and tubular in structure. Coiled part of this gland is called as secretory unit. Around secretory unit, myoepithelial cells are present. When they contract sweat comes out from sweat gland. This secretion is called as sweat. 

In sweat more than 99% is water and in rest part urea, uric acid ammonium chloride and sodium chloride salts are present. In sweat lysozyme is also present, which destroys bacteria. 
Smell in sweat is due to presence of fatty substances. Evaporation of sweat requires a lot of heat. Thus, evaporation of sweat brings down the temperature. This is an important thermo-regulatory adaptation in terrestrial vertebrates.

Multiple choice biology cell and cell organelles cell membrane and cell wall cell wall cell division in embryo development

The main function of the cell membrane is to:

  1. Provide support

  2. Maintain the cell shape and size

  3. Regulate the flow of materials into and outside the cell

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The cell membrane acts as a selective barrier that regulates the transport of materials, provides structural integrity, and maintains the internal environment of the cell. All listed functions are primary roles of the plasma membrane.

Multiple choice evs a treat for mosquito anaemia mosquito and human health diseases caused by mosquitoes non communicable diseases

What is the role of iron in blood?

  1. It helps to transport oxygen.

  2. It helps transport nutrients.

  3. It gives the red colour to the blood.

  4. All of the above.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  •  Iron is an essential element for blood production. 
  • About 70 per cent of your body's iron is found in the red blood cells of your blood called haemoglobin and in muscle cells called myoglobin.
  •  Haemoglobin is essential for transferring oxygen in your blood from the lungs to the tissues. Hence, the role of iron in the blood is that it helps to transport oxygen. 
So, the correct answer is 'It helps to transport oxygen'.

Multiple choice bio-chemistry lipids functions of lipids biomolecules: chemical constituents of living cells biochemistry

Biological function of lipids is/are

  1. Source of energy

  2. Insulating material

  3. Maintenance of cellular integrity with other macromolecules

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Fats are an important class of biomolecules.They are compounds of carbon, hydrogen and oxygen where the ratio of hydrogen and oxygen is less than that of water. Lipids are a concentrated source of energy and serve for long term energy storage in body of animals and plants. Their respiratory quotient is less than one. Approximately 9 calories are provided by one gram of fat as compared to 4 by carbohydrates. Fats also act as insulating material because they are poor conductors of heat. Most of the animals have a layer of fat below the skin acting as insulating material. Lipids also serve as structural biomolecules for example conjugate lipid molecules like phospholipids, glycolipids, sphingolipids etc.

Multiple choice bio-chemistry lipids functions of lipids biomolecules: chemical constituents of living cells biochemistry

Which of the following is the function of lipids?

  1. Regulation of membrane permeability

  2. Regulation of fluidity of membranes

  3. Electrical insulation to nerve fibre

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Lipids are broken down in the digestive tract to form fatty acids and cholesterol. Fatty acids and cholesterol are key components of cell membranes that regulate its fluidity and permeability. Lipids of the nervous system are localized in myelin sheaths thereby providing electrical insulation. Thus the correct answer is option D.

Multiple choice zoology coordination introduction to human endocrine system endocrine system and hormone coordination in human beings- chemical control

What is the main function of endocrinal system in animals?

  1. Coordination

  2. Combination

  3. Regulatory

  4. None of the given
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The function of endocrine glands in animals is to regulate chemical coordination. These glands secrete chemicals called hormones. 

So, the correct option is 'Coordination'.

Multiple choice biology our skeletal system and the skin other systems in the body introduction to skeletal system busy at work - our internal organs

Which of the following is not a function of skeletal system?

  1. Production of eythrocytes

  2. Storage of minerals

  3. Production of body heat

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

  • The adult human skeletal system consists of 206 bones, as well as a network of tendons, ligaments and cartilage that connects them.
  •  The skeleton serves six major functions: support, movement, protection, production of blood cells, storage of minerals and endocrine regulation. Hence, Production of body heat is not a function of the skeletal system.
 So, the correct answer is 'Production of body heat

Multiple choice evs - i busy at work - our internal organs other systems in the body introduction to skeletal system our skeletal system and the skin

Which of the following is not a function of the skeleton system?

  1. Production of erythrocytes

  2. Storage of minerals

  3. Production of body heat

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

Skeletal system is the articulation bones to give perfect shape to the body. They help in locomotion by attaching with muscles. 

Bones are made up of minerals like Ca++ and po4-. So they act as store house of minerals. 
Bones have bone marrow which contain stem cells. Stem cells are the precursors of blood form cells like RBC, WBC and platelets,
Skeletal system doesn't play any role in production of heat. Heat production is regulated by metabolic processes. 
So the correct option is C.