Cerebral Reflexes

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Question 10
How are involuntary actions and reflex actions different from each other?

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What is a cranial reflex?

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Functions of reflex arc?

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Reflex actions which involve brain are called as _________ .

1. stimulus

2. cerebral reflexes

3. spinal reflexes

4. reflex arc

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what is cerebral reflexes?

Q. What is the difference between simple reflex actions and involuntary actions?

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Is reflex arc voluntary or involuntary?

Q. Is the brain involved in reflexes?yes/no?if yes then is the definition of reflex arc wrong that says there is no involvement of brain?

Q. Why is cerebral reflex called reflex arc when it involves the brain and not the spinal cord?the basic definition of reflex arc says that theres no involvement of brain then why is it called cerebral reflex?

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Question 6
Which of the following statements are true?

(i) Sudden action in response to something in the environment is called reflex action.

(ii) Sensory neurons carry signals from the spinal cord to muscles.

(iii) Motor neurons carry signals from receptors to the spinal cord.

(iv) The path through which signals are transmitted from a receptor to a muscle or a gland is called reflex arc.

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

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Does brain has any role to play in reflex actions?? In our book it is written brain has no role and in another book it is written reflexes controlled by brain are called cerebral reflexes Which is right??

Q.

An automatic response that does not involve the control of brain is called ____________ action.

1. reflex

2. sensitivity

3. voluntary

4. systemic

Q. Match the following.

$\begin{array}{ccc}\text{Disease}& \text{Cause}& \text{Symptom}\\ \text{(1) Alzhiemer's}& \text{(A) Destruction of specialised ganglion in the brain}& \text{(X) Frothy discharge from mouth}\\ \text{(2) Parkinsons}& \text{(B) Irregular flow of electric charges in the brain}& \text{(Y) Loss of memory, inability to recognize friends}\\ \text{(3) Epilepsy}& \text{(C) Accumulation of insoluble protein in the neural tissue}& \text{(Z) Loss of body balance, shivering of body}\end{array}$

1. 1 $\to$ C $\to$ X, 2 $\to$ B $\to$ Z, 3 $\to$ A $\to$ Y
2. 1 $\to$ C $\to$ Y, 2 $\to$ A $\to$ Z, 3 $\to$ B $\to$ X
3. 1 $\to$ C $\to$ Z, 2 $\to$ A $\to$ Y, 3 $\to$ B $\to$ X
4. 1 $\to$ C $\to$ Y, 2 $\to$ B $\to$ X, 3 $\to$ A $\to$ Z

Q. Select the stimulus to which an organism responds to.

1. Touch
2. Light
3. Heat
4. Cold
5. Sound
6. Smell
7. Soil
8. Sky

Q. What is Reflex Arc?