Question 23
Which of the following is not an involuntary action?

(a) Vomiting
(b) Salivation
(c) Heart beat
(d) Chewing

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Solution

(d) Chewing

An involuntary action is one which occurs without the conscious choice of an organism. For example vomiting, salivation, heartbeat, blood pressure, etc. Chewing is a voluntary action.

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Question 23
Which of the following is not an involuntary action?

(a) Vomiting
(b) Salivation
(c) Heart beat
(d) Chewing

Question 7
Which of the following statements are true about the brain?

(i) The main thinking part of the brain is hindbrain.

(ii) Centers of hearing, smell, memory, sight, etc. are located in the forebrain.

(iii) Involuntary actions like salivation, vomiting, blood pressure are controlled by the medulla in the hindbrain.

(iv) Cerebellum does not control posture and balance of the body.

(a) (i) and (ii)
(b) (i), (ii) and (iii)
(c) (ii) and (iii)
(d) (iii) and (iv)

The part of brain which controls the involuntary actions such as heart beat, breathing, blood pressure, etc. is :

(a) pons

(b) medulla

(d) cerebellum

Match the following:

$\begin{matrix} 1. T h i s p a r t o f t h e b r a i n t e l l s u s & (i) C e r e b e l l u m w h e t h e r w e a r e h u n g r y o r f u l l 2. T h i s p a r t o f t h e b r a i n i s r e s p o n s i b l e & (i i) M e d u l l a f o r p r e c i s i o n o f v o l u n t a r y a c t i o n s 3. I n v o l u n t a r y a c t i o n s l i k e v o m i t i n g a n d s a l i v a t i o n & (i i i) F o r e - b r a i n a r e c o n t r o l l e d b y t h i s p a r t o f t h e b r a i n \end{matrix}$

Q. Classify the following as voluntary actions and involuntary actions.
Sneezing, throwing ball, heart beats, writing.

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Somatic Nervous System

Standard X Biology

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Question 23 Which of the following is not an involuntary action? (a) Vomiting (b) Salivation (c) Heart beat (d) Chewing

(d) Chewing An involuntary action is one which occurs without the conscious choice of an organism. For example vomiting, salivation, heartbeat, blood pressure, etc. Chewing is a voluntary action.

Question 23
Which of the following is not an involuntary action?

(a) Vomiting
(b) Salivation
(c) Heart beat
(d) Chewing

(d) Chewing

An involuntary action is one which occurs without the conscious choice of an organism. For example vomiting, salivation, heartbeat, blood pressure, etc. Chewing is a voluntary action.