The cranial nerves which originate from the medulla oblongata are
(1) IX, X, XI and XII
(2) III, VIl and IX
(3) VII, VII IX and X
(4) VIlI, IX, X, XI and XII
Node of Ranvier occurs where
(1) nerve is covered with myelin sheath
(2) neurolemma is discontinuous
(3) neurolemma and myelin sheath are discontinuous
(4) myelin sheath is discontinuous
In the homeostatic control of blood sugar level, which organs function as modulator and effector respectively?
(1) Liver and islet of Langerhans
(2) Hypothalamus and liver
(3) Hypothalamus and islet of Langerhans
(4) Islet of Langerhans and hypothalamus
The brain disease caused due to accumulation of amyloid -peptide is
(1) Addison's disease
(2) Huntington's disease
(3) Parkinson's disease
(4) Alzheimer's disease
Which of the following part of human brain is also called emotional brain?
1. Corpus callosum
2. Limbic system
3. Epithalamus
4. Broca's area
Go through the following table comparing the effect of sympathetic and parasympathetic nervous system. Which one is matched correctly?
Features Sympathetic Parasympathetic
Nervous System Nervous System
(1) Pupil of eye Dilates Constricts
(2) Heart rate Decreases Increases
(3) Intestinal Stimulates Inhibits
peristalsis
movement
(4) Salivary Stimulates Inhibits secretion
gland secretion
How macula lutea and corpus luteum are related ?
(1) Contribute in maintain pregnancy
(2) Both are a source of hormones
(3) Both are characterised by their yellow colour
(4) Both are found in human ovaries
The cornea is a very important component of the human eye. The main function of the cornea is to
(1) bend the light before it reaches the lens
(2) provide structural support to the eye
(3) contain a concentrated amount of cone cells in the correct orientation
(4) change the shape of the lens to enable the image to be focused on the retina
Animals possess nerve networks or nervous systems to respond to their environment. But
the single celled Amoeba does not possesses any nerve cell, so, how it come to know
whether a particle it encounters is a grain of sand and not its dinner?
(1) By chemotaxis
(2) By skin
(3) By hormones
(4) All of these
Assertion : Circular smooth muscles of iris contract when bright light falls on the eye.
Reason : Pupil gets constricted by the contraction of circular smooth muscles of iris.