Biology

Human Physiology and Anatomy

2,235 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 zoology menustral cycle in human parturition and lactation pregnancy and birth fertilization and post fertilization in humans

The function of oxytocin is to help in

  1. child birth

  2. growth

  3. lactation

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

Oxytocin i a hormone released by the posterior pituitary that helps the muscles of the uterus to contract during parturition (child birth). It also stimulates the release of prostaglandins that help cause further contraction. So, the correct option is 'child birth'.

Multiple choice botany the world of microbes bacteria - introduction, shape and structure bacteria: types and structure bacteria; benefits and harmful effects non cellular organism : virus world of virus

Why is a capsule advantageous to a bacterium?

  1. It provides means of locomotion

  2. It allows bacteria to "hide" from host's immune system

  3. It allows the bacterium to attach to surface

  4. It protects the bacterium from desiccation.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

  • Bacterial capsule usually consists of a polysaccharide layer that lies outside the cell envelope. The capsule is found in both gram-positive and gram-negative bacterium.
  • The capsule is considered as virulence factor because it enhances the ability of bacteria to cause disease. It protects the bacterial cell from engulfment by macrophages.
  • Capsules also contain water which protects the bacterium from desiccation.
So, the correct answer is 'It protects the bacterium from desiccation'.

Multiple choice biology plant and animal tissues nervous system in animals structure of neuron structure and function of neuron

What is the function of neuron?

  1. It helps in conducting impulses.

  2. It helps in regulating control and coordination in the animals.

  3. Both A and B.

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

A neuron is an electrically excitable cell. It processes and transmits information through electrical and chemical signals. These signals between neurons occur via synapses, specialized connections with other cells. Neurons can connect to each other to form neural networks. Neurons are the core components of the nervous system, which includes the brain, spinal cord which together comprise the central nervous system (CNS) and the ganglia of the peripheral nervous system (PNS). Specialized types of neurons include: sensory neurons which respond to touch, sound, light and all other stimuli affecting the cells of the sensory organs that then send signals to the spinal cord and brain, motor neurons that receive signals from the brain and spinal cord to cause muscle contractions and affect glandular outputs and interneurons which connect neurons to other neurons within the same region of the brain or spinal cord in neural networks.
Therefore, the correct answer is option C.

Multiple choice biology plant and animal tissues nervous system in animals structure of neuron structure and function of neuron

Touch on the right side stimulate neurons on

  1. Right somatic sensory area

  2. Right somatic motor area

  3. Left somatic sensory area

  4. Both B and C
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Due to the decussation (crossing over) of nerve pathways in the central nervous system, sensory information from the right side of the body is processed in the left somatic sensory area of the brain.

Multiple choice evs - i community health and hygiene drug, tobacco and alcohol consumption addiction and dependence important stages in agricultural development disorders of nervous system

The tobacco protein induced arteriosclerotic disease is

  1. Aneurysm

  2. Polyarteritis nodosa

  3. Thromboangiitis obliterans

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

Thromboangiitis obliterans, also called Buerger disease is a rare disease caused by small blood vessels that become inflamed and swollen. The blood vessels, then narrow or become completely blocked by the blood clots (Thrombosis). Blood vessels of the hand and feet are especially affected. This condition mostly affects young men, ages, 20-40, who are heavy smokers or chew tobacco.
Thus, the correct answer is option (A), 'Thromboangiitis obliterans'

Multiple choice physics the human eye and the colourful world human eye and its working what is inside our eyes? human eye and defects of vision

What is the function of aqueous humour?

  1. Helps in transmitting impulses to the brain

  2. Protect the eyeball from collapsing

  3. Keeps the cornea moist and give definite shape to the eyeball

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

Aqueous humour is present between cornea and eye lens. It keeps the cornea moist and maintains the shape of eye ball.

Multiple choice physics the human eye and the colourful world human eye and its working what is inside our eyes? human eye and defects of vision

A series of fast moving still pictures can create an illusion of movement because.

  1. the eye can focus on very rapidly changing pictures

  2. eye is quicker than the brain

  3. the eye can separate two images only when the interval of separation between them is more than one-tenth of a second

  4. the optical cortex can see through the rapidly moving images
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Human eye cannot differentiate two images when the interval of separation between them is less than one-tenth of a second

Multiple choice zoology meaning of life energy flow and loss energy flow in a food chain energy flows

Maintenance of internal favourable conditions, despite changes in external environment is

  1. Entropy

  2. Steady state

  3. Enthalpy

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

Higher animals like mammals tend to maintain a constant internal environment despite changes in external environment. This is called as homeostasis, e.g., in humans a body temperature around 97 fahrenheit is considered normal. In summers when outside temperature is high or in winters when outside temperature is very low the body temperature remains constant. This is one example of homeostasis. The nervous and endocrine system closely interplay to maintain homeostasis. Therefore, the correct answer is option D.

Multiple choice zoology gas exchange and smoking gas exchange gas exchange in humans respiratory system in humans

The alveoli contain specialized cells that secrete a phospholipoprotein complex known as pulmonary surfactant. The function of pulmonary surfactant is ________________________.

  1. to provide some rigidity to the alveoli to prevent lung collapse

  2. to decrease the surface tension of the alveoli, making it easier to expand them
  3. to facilitate the diffusion of $O _2$ and $CO _2$ by providing protein channels through which these gases flow

  4. to provide a sticky surface upon which dust and microbes are trapped and disposed of
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Alveoli is the region in the lungs where exchange of gases takes place.According to histology of alveolar wall ,it contain 2types of cell

 I.e. 1-Type-1 cell 
            2.Type -2 cell which secret  DPPP(DIPAMITOYL PHOSPHATIDOYL CHOLINE OR LECITHINE) which acts as a surfactant and help in preventing collapsing of lungs.

Multiple choice biology cell-the basic unit of life nucleus organelles in cell membranous and non-membranous organells

What is the central role of nucleus?

  1. Diffusion

  2. Osmosis

  3. Excretion of toxic materials

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

A eukaryotic cell has a nucleus, bounded by a double wall membrane structure known as a nuclear membrane. The nuclear membrane is a discontinuous membrane having nuclear pores, which act as a protein channel for regulating the exchange of materials between cytoplasm and nucleoplasm. It regulates the cell in various ways but, the primary function of the nucleus is to contribute in cell division during reproduction by undergoing karyokinesis.
So, the correct answer is option D.

Multiple choice biology cell-the basic unit of life nucleus organelles in cell membranous and non-membranous organells

What is the function of nucleus in a cell?

  1. It controls all the metabolic activities of the cell.

  2. It brings about growth of the cell by directing the synthesis of structural proteins.

  3. It contains genetic information in the form of genes located in the chromosomes.

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

The nucleus is the membrane bound important structure of the cell. Nucleus regulates all the cellular activities by controlling the enzymes required for cellular processes. It contains genetic information in the form of genes located in the chromosomes. It brings about growth of the cell by directing the synthesis of structural proteins. It also controls all the metabolic activities of the cell.
So, the correct answer is option D.

Multiple choice biology cell-the basic unit of life nucleus organelles in cell membranous and non-membranous organells

Function of Nuclear membrane is 

  1. Nuclear membrane porous and the inside of the nucleus.

  2. It allows the movement of materials between the cytoplasm and the inside of the nucleus

  3. Both A and B

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Nuclear membrane is also porous and allows the movement of materials between the cytoplasm and the inside of the nucleus.

Multiple choice biology chemical coordination and integration hormones coordination in human beings- chemical control endocrine system in humans
Proteins perform many physiological functions. For example, some proteins function as enzymes. One of the following represents an additional function that some proteins perform

  1. antibiotics

  2. pigment conferring colour to skin

  3. pigment making colours of flowers

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

Most of the body functions are regulated by hormones like growth, vegetative and sexual development, thermal regulation, cellular oxidation, metabolism of carbohydrates, proteins, fats, etc. Hormones are needed in very small quantity to carry out these functions. Some hormones are proteinaceous eg: insulin (regulates sugar metabolism), growth hormone of pituitary, parathyroid hormone parathormone (regulates calcium and phosphate transport).

Multiple choice

How is carbon chemically important to living organisms?

  1. it's the basis for the molecules animals need

  2. it's the basis for molecules of water

  3. it helps detoxify common molecules

  4. it is not chemically important
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Carbon's ability to form stable bonds with many other elements allows it to create the complex molecules (like DNA, proteins, and sugars) necessary for life.