Tag: zoology

Quizzes (289) Questions (5869)

Questions Related to zoology

Multiple choice zoology nervous system of man major divisions of nervous system introduction to control and coordination neurons and synapses

Which of the following is the most complete list of animals that have both a central nervous system. (CNS) and a peripheral nervous system (PNS)?

  1. Hydra, planarian, earthworm, rabbit, human

  2. Planarian, earthworm, rabbit, human

  3. Earthworm, rabbit, human

  4. Rabbit, human
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The CNS contains the brain and the spinal cord. Everything else but the CNS it is known as the PNS. The PNS contains nerves, which leave the brain and the spinal cord and travel to all the parts of the body.

So, the correct option is 'Earthworm, rabbit, human'.

Multiple choice zoology nervous system of man major divisions of nervous system introduction to control and coordination neurons and synapses

Which part of the brain contains such an area which is neither clearly sensory nor motor in function?

  1. Medulla

  2. Cerebral cortex

  3. Grey matter of cerebrum

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

  • The cerebral cortex of the brain has three regions of function, namely Sensory, motor and association areas. 
  • This association area does not belong either of the primary sensory or motor regions since its function is associative.
  • The main function of these association regions is to provide a perpetual understanding of the world. it helps in effective interaction, abstract thinking, and language. 
  • These association regions are present in the form of an interwoven network.

So the correct option is 'Cerebral cortex'.

Multiple choice zoology nervous system of man major divisions of nervous system introduction to control and coordination neurons and synapses

In which lobe of the cerebrum are the visual centres located?

  1. Frontal lobe

  2. Parietal lobe

  3. Temporal love

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

The visual system is the part of the central nervous system which gives organisms the ability to process visual detail as sight, as well as enabling the formation of several non-image photo response functions. In cerebrum, the visual centres are located on the occipital lobe.

So, the correct option is 'Occipetal lobe'.

Multiple choice zoology nervous system of man major divisions of nervous system introduction to control and coordination neurons and synapses

Rapid integration of the functional activities in human is achieved by 

  1. Nervous system

  2. Endocrine system

  3. Blood

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

The body's communication systems are the endocrine and nervous systems. At an integrative level, the primary function of the nervous system is to control many of the functions of our bodies and minds. It does this by extracting information from the environment using sensory receptors, sending signals that encode this information into the central nervous system, processing the information to determine an appropriate response, and sending output signals to muscles or glands to initiate the response. The nervous system responds rapidly to short-term changes. By nature, these hormones are synthesized at a distance from their target cells and travel through the bloodstream or intercellular fluid until they reach these cells. Upon reaching their target cell, the hormone acts on the cell to increase or decrease the expression of specific genes. This process takes significantly longer than that of the nervous system, as endocrine hormones must first be synthesized, transported to their target cell, and enter or signal the cell. Then, the target cell must go through the process of transcription, translation, and protein synthesis before the intended action of the hormone can be seen . 

Multiple choice zoology nervous system of man major divisions of nervous system introduction to control and coordination neurons and synapses

Identify the origin of sympathetic nerve fibres and the location of their ganglia.

  1. They arise from thoraco-lumbar region of spinal cord and form ganglia just beside the vertebral column.

  2. They arise from thoraco-cervical region of spinal cord and form ganglia just beside the vertebral column.

  3. They arise from cranio-sacral region of spinal cord and form ganglia very close to effector organ.

  4. They arise from thoraco-lumbar region of spinal cord and form ganglia very close to effector organ
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
The sympathetic nervous system( also called thoracic-lumber outflow as its preganglionic fibres arise from the thoracic and lumbar region of the spinal cord) consists of two sympathetic nerves or chains running from head to the end of the sacral region, one on each side of the vertebral column.
Each sympathetic chain bears several ganglia called lateral or chain ganglia. some chain ganglia fuse to form three ganglia, in the neck, after which there is a linear series of ganglia in the thoracic and lumbar regions.
So, the correct answer is 'They arise from the thoracolumbar region of spinal cord and form ganglia just beside the vertebral column'.


Multiple choice zoology nervous system of man major divisions of nervous system introduction to control and coordination neurons and synapses

Neurons are important components of

  1. Brain

  2. Central nervous system

  3. Spinal cord

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

Our nervous system is made up of brain, spinal cord, sense receptors and a whole lot of nerves. But all these are ultimately made up of nerve cells or neurons.

Neurons are cells that send and receive electro-chemical signals to and from the brain and nervous system. There are about 100 billion neurons in the brain. 

Multiple choice zoology excretory system of human disorders of excretory system disorders related to the excretory system functions and disorders of kidney

The most commonest component of kidney stones is

  1. Calcium oxalate

  2. Uric acid

  3. Cysteine

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

Kidney stones or renal calculi are solid masses made of crystals. Calcium stones are the most common. They can be made of calcium oxalate
So, the correct answer is 'Calcium oxalate'

Multiple choice zoology excretory system of human disorders of excretory system disorders related to the excretory system functions and disorders of kidney

Occurence of excess urea in blood due to kidney failure is

  1. Urochrome

  2. Uraemia

  3. Uricotelism

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

Accumulation of urea in body is called uraemia. It may be due to kidney failure and other metabolic waste products may also accumulate. Uraemia develops after about 7 days of anuria (absence of urine) because of the reduced glomerular filtration rate and impaired tubular secretion of urea. Increased blood urea usually leads to confusion and mental disorientation.

Multiple choice zoology excretory system of human disorders of excretory system disorders related to the excretory system functions and disorders of kidney

Diuresis is the condition in which

  1. The excretion volume of urine increases

  2. The excretion volume of urine decreases

  3. The kidney fails to excrete urine

  4. The water balance of the body is distributed.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Oliguria is the condition of less than 400 ml of urine per day in adults, whereas severe oliguria means less than 100 ml of urine per day in adults. Anuria means absence of urine and diuresis is the production of a large volume of urine. Diuresis may lead to acute dehydration and electrolyte imbalance.