C-10 — Co-ordination

Why is coordination of physiological activities essential for plants?

Which of the following is NOT a stage in the life cycle of a plant?

Plants developed delicate coordination through —

Which factors notably influence the life cycle stages of a plant?

The hormone produced in the plant body that regulates growth and organ formation is called —

Phytohormones are also described as —

Which of the following is NOT a main natural phytohormone?

Hormones not yet separated or identified are called —

Which are the main postulated hormones in plants?

Florigen is presumed to be formed in —

Florigen transforms vegetative buds into —

Hormones in plants are —

Who first discovered the phytohormone auxin?

Charles Darwin studied the effect of light on —

Auxin is responsible for the bending of coleoptiles because in darkness the coleoptile —

The direction of auxin movement in plant cells is —

Auxin increases the rate of —

Which is a role of auxin?

Application of auxin causes roots to grow from —

IAA, IBA and NAA are types of —

The full form of IAA is —

The causal organism of Bakanae disease of rice is —

Most gibberellins are found in —

Gibberellin influences —

Gibberellin shortens the period of —

Cytokinin is found in the water of —

Cytokinin generally stimulates —

Cytokinesis during cell division occurs due to the effect of —

Which phytohormone delays the aging process?

The physical state of ethylene is —

Which hormone is mainly used to ripen fruits artificially?

Ethylene accelerates the —

The auxin that improves the effectiveness of cambium is —

The uncontrolled cell cluster developed during healing of an injured plant tissue is called —

Fruits without seeds are produced by —

Consider the following statements about phytohormones:

In the presence of light, the hormone auxin becomes —

The ability of the tip of plumule or radicle to feel the stimulus of gravitation is called —

Owing to gravitation, the components of the cell are translocated —

Chrysanthemum is an example of a —

The rhythm of light and dark periods in a plant is an example of —

The required photoperiod for a short day plant is —

The required photoperiod for a long day plant is —

Which is an example of a long day plant?

Which is an example of a day neutral plant?

The acceleration of flowering of plants by applying cold is called —

The temperature applied to seeds for vernalization to ensure normal flowering is —

Consider the following stimulants that affect plant growth:

Movement in plants is mainly categorised into —

Which is an example of movement of locomotion?

Higher plants anchored in soil exhibit —

The movement of the stem towards light is called —

The movement of the root away from light is called —

Twining of tendril around a suitable host is an example of —

Necessary co-ordination in animals is done by —

The activities of hormones are controlled by the —

Hormones are often called —

The hormone secreted by an ant to guide other ants to a food source is —

Some insects can attract their partner by secreting pheromones from a distance of —

Humans use pheromones to —

Stimulus from external environment includes —

Internal stimulants include —

The system through which an animal responds to stimuli and maintains relations with the environment is called —

The nervous system is divided into —

The peripheral nervous system is divided into —

The central nervous system consists of —

The brain is protected by the —

The brain is divided into —

The largest part of the brain is the —

The two cerebral hemispheres are connected by a bunch of nerves named the —

The right hemisphere of the cerebrum controls —

The exterior surface of the cerebrum is called the —

The other name of the cortex is —

The white matter of the cerebrum consists of —

Conscious activities such as speech, vision, memory and intelligence are controlled by the —

Among all animals, the most progressively developed forebrain is found in —

The mid brain serves as a bridge between —

The mid brain plays an important role in —

The hindbrain consists of —

Which part of the brain controls muscle stress, balance, and the activities of voluntary muscles?

The pons is located between the —

The most posterior part of the brain is the —

The total number of pairs of cranial nerves in human is —

How many pairs of cranial nerves originate from the medulla oblongata?

The cranial nerves originating from the medulla oblongata control the functions of —

The spinal cord leaves the skull through the —

The spinal cord extends up to the —

The spinal cord is protected by the —

The arrangement of grey and white matter in the spinal cord is —

The number of pairs of spinal nerves in humans is —

The basic functional unit of the nervous system is —

A neuron is made up of two parts —

Which of the following is NOT found in the cytoplasm of the neuron cell body?

Small branched elongations around the neuron cell body are called —

The number of dendrites in a neuron cell body may be from —

The function of dendrites is to —

The thin layer that encloses the axon is called the —

The fatty layer between the neurilemma and the axon is called —

The non-myelinated interrupted parts of the myelin sheath are known as —

The membrane covering the main axis of the axon is called the —

The junction between two neurons is called a —

The liquid present in the synapse is called —

Through a synapse, nerve impulses travel —

The approximate number of neurons in the human brain is —

Each neuron in the human brain is connected through synapses to about —

Sensory neurons receive stimulation through —

Motor nerves send impulses from the brain to —

The immediate response to a specific stimulus, controlled by the spinal cord instead of the brain, is called —

When a torch light is shone in the eye, the pupil contracts because —

In a needle-prick reflex, the skin acts as the —

In a reflex arc, impulses travel from the spinal cord to the dendrite of the motor neuron through —

Consider the following about the cerebrum:

The peripheral nervous system consists of —

The functions of the internal organs such as the heart, intestine, stomach and pancreas are regulated by the —

The autonomic nervous system is divided into —

The approximate velocity of nerve impulse transmission is —

If a nerve impulse reaches a gland, the gland —

If a nerve impulse is transmitted to a muscle, the muscle —

The secretions produced by the ductless glands or endocrine glands are known as —

Hormones are carried to specific cells by —

Which of the following is true about endocrine glands?

Over and under secretion of hormones can cause —

The pituitary gland is situated —

Which gland is considered the main hormone-producing gland of the human body?

The growth hormone of the human body is secreted by the —

Which of the following is NOT secreted by the pituitary gland?

The thyroid gland is situated at —

The hormone thyroxin generally controls —

The hormone calcitonin secreted by the thyroid gland helps in —

The number of parathyroid glands in humans is —

The parathormone hormone regulates —

The thymus gland is located in the —

The thymus gland helps in developing —

With increasing age, the size of the thymus gland —

The adrenal glands are located —

The adrenal gland helps to relieve —

The hormone secreted by the adrenal gland is —

The Islets of Langerhans are situated in the —

The Islets of Langerhans regulate —

The hormones secreted by the Islets of Langerhans that regulate the level of glucose in blood are —

In mature males, the reproductive organ secretes —

In mature females, the reproductive organ secretes —

Hormones from the gonads control —

Consider the following about the pituitary gland:

Goiter is mainly caused by the deficiency of —

The main natural source of iodine for human beings is —

The number of goiter patients is high in regions —

Diabetes mellitus is caused by failure of the pancreas to produce sufficient —

In Type-1 diabetes, the patient's body —

According to doctors, diabetes can be controlled by following the three 'D's, which are —

Which is NOT a symptom of diabetes mellitus?

Diabetes mellitus is —

If a diabetic patient faints, the immediate measure is to —

A stroke happens in the —

The most dangerous form of stroke is —

The main cause of brain hemorrhage is —

Which of the following is NOT a typical symptom of stroke?

Consider the following preventive measures for stroke:

The loss of sensation and motion in a part of the body is termed —

Which is a common cause of paralysis?

Epilepsy is also known as the —

An epileptic patient should be kept away from —

Which is a possible cause of epilepsy?

Parkinson disease usually starts after the age of —

The substance produced by nerve cells that helps in muscular movement is —

In Parkinson disease, the gradually destroyed cells are those that produce —

Consider the symptoms of Parkinson disease:

Which of the following is NOT mentioned as an addictive substance in the chapter?

Sedative pills are prepared artificially from —

According to recent research, the main cause of drug addiction is —

The substance whose level rises in blood with the use of tobacco or chewing jarda is —

Nicotine first stimulates nerve cells and afterwards —

The Directorate of Narcotic Control in Bangladesh was established in —

Consider the harmful effects of addiction:

Which hormone is secreted by the thymus gland?

The Islets of Langerhans —

What is the reason behind the observed condition of the plant shown in the first figure?

The growth regulator responsible for part B in the second figure —

Why is the pituitary gland considered the master endocrine gland of the human body?

Why is the cerebrum called the centre of sensations?

Which is a major harmful effect of drug addiction on a person?

Which best describes the cause of paralysis?

What does the 'Diet' part of the 3D management of diabetes refer to?

In the case of Mr. Matin who experiences difficulty in movement and abnormality in facial expression, the most likely disease is —

A person suddenly loses consciousness with stiff neck and relaxed muscles after an emotional argument. This condition is most likely —