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

Which of the following is not a function of lymph?

  1. Supplies oxygen and prevents spreading of infections

  2. Returns proteins to the blood

  3. Absorbs vitamins and minerals

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

Lymph supplies oxygen, nutrients, hormones, etc to the cells and removes metabolic wastes from the cells. It destroys microorganisms in the lymph nodes and prevents spreading of infections. It absorbs and transports fat, fat soluble vitamins and minerals from intestine. It maintains the volume of blood. It returns proteins and fluids to the blood. 

Thus, the correct answer is option D.

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 chemistry biomolecules enzymes and hormones hormones coordination in human beings- chemical control

The function(s) of oxytocin is/are to :

  1. stimulate the release of milk from the mother's mammary glands when her baby is nursing.

  2. cause the uterus to contract

  3. induce labor

  4. all of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Functions of oxytocin are: 
(i) It helps uterine muscles to contract and also increases production of prostaglandins
(ii) Sometimes it is given to induce labor if it has not started naturally or it can be used to strengthen contractions to aid childbirth.
(iii) Stimulate the release of milk from the mother's mammary glands.
Multiple choice zoology nervous system nervous systems involved in emotions types of nervous system components of nervous system

One function of parasympathetic nervous system is

  1. Contraction of rectum

  2. Inhibits salivation

  3. Acceleration of heart beat

  4. Constriction of pupil
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The parasympathetic nervous system, or PSNS, is a part of the nervous system. The nervous system sends signals to and from different parts of the body via nerves. The PSNS is responsible for all the activities that take place when the body is at rest. During a period of flight and fight, the pupils dilate to allow us to see more clearly and make faster decisions. During rest and digest, the PSNS causes the pupils to constrict.

So, the correct option is ' Constriction of pupil '.

Multiple choice zoology nervous system nervous systems involved in emotions types of nervous system components of nervous system

Function of sympathetic system is to

  1. Decrease heart beat

  2. Increase heart beat

  3. Contract respiratory organ

  4. Secrete saliva
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The sympathetic branch of our autonomic nervous system originates in the spinal cord. It goes into action to prepare the body for physical or mental activity. Its general action is to mobilize the body in a fight response. It increases muscle blood flow and tension, dilates pupils, accelerates heart rate and respiration, and increases perspiration and arterial blood pressure. To conserve and concentrate energy, it slows down digestive activity.

Multiple choice economics sustainable development with equity liberalisation objectives of economic planning in india need for sustainable development introduction to social movements and its types social movements

What are the functions of environment?

  1. It supplies resources

  2. It assimilates waste

  3. It sustains life by providing genetic and biodiversity

  4. Supports life without human actions

  5. All of the above
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

The environment consists of the air, water, land, and all the conditions that surround living organisms. It is important to note that all the systems in the environment are interrelated such as the interactions of animals and humans on the ecosystems. Environmental functions refer to environmental services, including spatial functions, waste disposal, natural resource supply and life support.

The environment is an important issue even when society is faced with economic crises, wars, and unending social problems. It matters because Earth is the only home that humans have, and it provides air, food, and other needs.

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 botany internal structure of root, stem and leaf internal structure of dicot stem internal structure of stem(dicot and monocot) anatomy of stem

Major function of cortex is?

  1. Conduction of water

  2. Storage of water

  3. Storage of food

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

A. Conduction of water – xylem conducts water.

B.Storage of water – water storage parenchyma

C.Storage of food – cortex stores reserve food materials.

D. Strength – hypodermis and pericycle in dicot stem provides strength.

So, the correct option is ‘Storage of food’.

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 botany leaf - external morphology morphology of leaf structure of a leaf the leaf

Chief functions of leaves are

  1. Transpiration and photosynthesis

  2. Respiration and photosynthesis

  3. Respiration and digestion

  4. Respiration and transpiration
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The function of the stomata is to allow water vapor and gases to pass in and out of the leaf. The stomata are also responsible for the process of transpiration, the rate at which a plant loses water. Air enters the plant through the stomata. The air contains carbon dioxide which is used in the photosynthesis process. Then the transpiration and photosynthesis are the main functions of leaves.

So, the correct option is A.