Read the following passage and answer the questions that follow : A middle-aged person is facing some…
Read the following passage and answer the questions that follow :
A middle-aged person is facing some cognitive changes in himself. His early symptoms included mild forgetfulness. For example, forgetting where he left his mobile or failing to find words to complete his sentences. He was facing problems in driving a car, climbing up and down the stairs, inserting a plug into an outlet. He slowly developed a sad mood and anxiety.
(a) What are voluntary actions ?
(b) Which part of the brain is responsible for precision of voluntary actions ?
(c) (i) Explain the role of the medulla.
Solution
(a) Actions which are controlled by forebrain / Actions which are
under our control and are performed according to our will.
(b) Cerebellum.
(c) (i) Regulates involuntary functions like heart rate/ blood pressure/
breathing / sneezing/ vomiting.
OR
(c) (ii) Animal muscles are made up of special proteins, that change
both shape and arrangement in response to nervous electrical
impulses, new arrangements of these proteins give the muscle
cells a shorter form so, muscle cells move which help animals
to move.