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Ch 6 Control and Coordination for class 10
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Ch 7 IMP question science for class 10
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Some examples from this set of practice questions
1.
What are hormones?
Answer: Ans Hormones are the chemical substances secreted in trace amounts by specialised tissue called endocrine glands.
2.
State how concentration of auxins stimulates the cells to grow longer on the side of shoot which is away from light?
Answer: Ans Auxin form in the shoot tip but diffuse toward the part which is in shade/away from the light. The concentration on shady part increase stimulation cells in this part to elongate. The side of shoot on this side grows longer than the part in light hence bend towards light.
3.
1. Name the endocrine gland associated with brain. 2. Which gland secretes digestive enzymes as well as hormone? 3. Name the endocrine gland associated with kidneys.
Answer: 1. a. Pituitary gland, 2. b. Pancreas, 3. c. Adrenal gland,
4.
1. Which endocrine gland is present in males but not in females? 2. Which hormone is responsible for changes in females during puberty? 3. Iodine is necessary for the synthesis of which hormone?
Answer: 1. d. Testes, 2. e. Oestrogen, 3 f. Thyroxine.
5.
Draw a diagram of the cross-sectional view of the human brain and label the parts of the brain with their functions.
Answer: Ans The following are the functions of several brain regions: The medulla oblongata is responsible for regulating reflex responses and involuntary actions. Moreover, it regulates vomiting, salivation, and blood pressure. Cerebellum: It directs and synchronizes various muscle movements. It is in charge of voluntary movements and keeps the body balanced whether one is walking, drinking, catching, etc. Parts of the forebrain include the following: 1. Cerebrum: Responsible for thinking, speaking, reasoning, intelligence, and information utilization.
Content preview
, FARHAN ALINervous System:
The nervous system is like the control center of our bodies. It's
made up of special tissues called nervous tissue. The worker in
this system is the nerve cell or neuron. The nervous system is
mainly in charge of managing and coordinating things in complex
animals.
Functions of the nervous system:
1. The nervous system gets information from the world around us.
2. It collects information from different parts of our body.
3. It helps us make decisions and control our muscles and glands.
Neuron or Nerve cell: Neuron is a highly specialized
cell which is responsible for the transmission of
nerve impulses.
exam mei ayega!
The cell body, or cyton, is the main rounded part of the neuron
where you find the central nucleus and cytoplasm.
Dendrites are like the tree branches of the neuron's cell body.
They receive and pass on signals or messages.
The axon is the neuron's long part that carries messages away
from the cell body. It's protected by a covering called the
myelin sheath.
Nerve endings are like tiny branches at the ends of neurons,
and they send electrical signals to other neurons.
, FARHAN ALI
E.M.A
Working of a neuron:
1. The neuron gets information from receptors as an electrical
signal at the start of its dendrite.
2. This signal travels from the dendrite to the cell body and then
all the way to the tip of the axon.
3. Between two neurons, there's a small gap known as a synapse.
Special chemicals bridge this gap to transmit the same signal to
the next neuron.
4. At the end of the axon, electrical signals trigger the release of
these chemicals.
A synapse is where the end branches of one neuron's axon
connect with the dendrite of another neuron.
E.M.A
Transmission of nerve impulse: Nerve impulses travel
in the following manner from one neutron to the next.
Dendrites → cell body → axon → nerve endings at the tip of axon → synapse → dendrite of next neuron.
The chemicals released from the tip of a neuron's axon traverse the
synapse or neuromuscular junction to connect with the adjacent cell.
types of nervous
system
CENTRAL NERVOUS SYSTEM PERIPHERAL NERVOUS SYSTEM
(CNS) (PNS)
{Human Brain & Spinal Cord} {3 types of Nerves}
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