Which of the following are cerebral reflexes ?
a person pulls away his hand on touching a hot object
a person spits out immediately when a fly enters his mouth while talking
a person walking bare foot lifts his foot at once on stepping on to a nail
a person's pupil contracts at once in the presence of bright light
(i) and (ii)
(ii) and (iii)
(iii) and (iv)
(ii) and (iv)
One of the following acts as an endocrine gland as well as an exocrine gland. This one is :
salivary gland
pancreas
pituitary
parathyroid
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 electrical signals from spinal cord to muscles in a reflex action
(iii) motor neurons carry signals from receptors to spinal cord in a reflex action
(iv) the pathway of transmitting signals from a receptor to a muscle is a reflex action
(i) and (iii)
(i) and (iv)
(i), (ii) and (iii)
One of the following gives the correst sequence of the components in a reflex arc. This is :
Receptors → Muscle → Sensory neuron → Motor neuron → Spinal cord
Receptors → Motor neuron → Spinal cord → Sensory neuron → Muscle
Receptors → Spinal cord → Sensory neuron → Motor neuron → Muscle
Receptors → Sensory neuron → Spinal cord → Motor neuron → Muscle
The number of pairs of nerves which arises from the spinal cord is :
21
31
41
51
The involuntary actions in the body are controlled by :
medulla in forebrain
medulla in hindbrain
medulla in spinal cord
medulla in midbrain
Select the odd one. Write the common features of others
Axon
Nephron
Dendron
Dendrite
Which of the following helps in maintaining posture and balance of the human body ?
cerebellum
cerebrum
medulla
pons
The gustatory receptors of our body are in one of the following organs. This organ is :
ear
nose
tongue
skin
The contraction of pupil of the eye in the presence of bright light is an example of :
Voluntary reflex
Spinal reflex
Cerebral reflex
Adrenal reflex
