Biology
Assertion (A): Cerebellum enables us to remember, think and reason.
Reason (R): It is the largest portion of the brain and occupies the whole central area.
- Both A and R are true.
- Both A and R are false.
- A is true and R is false.
- A is false and R is true.
Answer
Both A and R are false.
Explanation — The main function of cerebellum are muscular coordination and body balance. Cerebrum, the largest portion of the brain, is the seat of intelligence, consciousness and will power. Hence, it enables us to remember, think and reason. Therefore both the Assertion and the Reason are incorrect.
Related Questions
Ayush, a student of class 8 was preparing for his biology annual exam but could not understand the terms Receptor, Effector, Stimulus and Response. Which of the following statements explains 'receptor' ?
P. Receptors are sense organs.
Q. Receptors send impulses to CNS through sensory nerves.
R. Receptors receive messages from the central nervous system.
- Only R
- Only Q
- Only P and R
- Only P and Q
Assertion (A): Synapse is the junction between two neurons which communicates impulses/ messages.
Reason (R): Neurons must be connected with each other through some means in order to transmit the unidirectional flow of impulses.
- Both A and R are true.
- Both A and R are false.
- A is true and R is false.
- A is false and R is true.
Assertion (A): The glands and muscles are considered as effector organs.
Reason (R): Muscles and glands are highly affected by the impulses carried through the sensory nerves from sense organs to the central nervous system (brain/ spinal cord).
- Both A and R are true.
- Both A and R are false.
- A is true and R is false.
- A is false and R is true.
Assertion (A): The sympathetic and parasympathetic nervous systems are antagonistic (opposite) in their actions.
Reason (R): Sympathetic nervous system becomes active when a person is in fear whereas parasympathetic nervous system gets activated when in anger.
- Both A and R are true.
- Both A and R are false.
- A is true and R is false.
- A is false and R is true.