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WorksheetsBiology Unit-8 Test
Total questions: 40
Worksheet time: 3600secs
What are three components of homeostatic regulation?
Receptors, control center and effectors
PNS, CNS and effectors
Sensory, motor and associative neurons
Cerebrum, cerebellum and pons
In humans, nervous coordination is described by:
Reception of stimulus by receptors
Analysis of the stimulus by inter neurons
Generation of response by effectors
All A, B, C
These are the structures which respond when they are stimulated by an impulse coming through motor neuron:
Glands
Thermo-receptors
Sensory neurons
Pacinian corpuscles
In the skin, the receptors are concerned with the detection of at least:
Three different senses
Five different senses
Four different senses
Six different senses
The chief structural and functional units of nervous system are:
Neurons
Microglia
Neuroglia
Schwann cells
All of the following are important functions of neuroglia in CNS except:
Protection of neurons
Speed up impulse conduction
Division of nerve cells
Provide nutrition to neurons
_______ of certain brain cells branch profusely, giving cell a tree-like appearance.
Myelin sheath
Axon
Dendron
Dendrites
The fiber of sensory neuron between dorsal root ganglion and peripheral receptors is:
Axon
Dendrites
Dendron
Cell body
Cluster of ribosomes associated with RER and present inside the cell body of neurons is specifically called:
Axolemma
Neurofibrils
Nissl’s granules
Polysomes
Identify the correct option with respect to the direction of conduction of nerve impulses by the following protoplasmic processes of neurons:
A
B
C
D
While responding to stimulus, motor neurons give signals to:
Receptors
Effectors
Afferent neurons
Relay neurons
In dorsal root ganglion, cell bodies of _________neurons are present.
Sensory
Intermediate
Motor
Relay
Identify the correct sequence of structures involved in a reflex circuit:
Receptor → Motor neuron → Associative neuron → Gland → Sensory neuron
Receptor → Motor neuron → Sensory neuron → Muscle → Associative neuron
Receptor → Sensory neuron → Associative neuron → Motor neuron → Effectors
Motor neuron → Associative neuron → Effectors → Sensory neuron → Muscle
Resting membrane potential is actively maintained by protein pumps which utilize ATPs for:
Na+ influx and K+ efflux
Na+ efflux and K+ influx
Na+ and K+ influx
Na+ and K+ efflux
The correct sequence for depolarization and repolarization is:
1. Stimulus applied at a site on polarized membrane
2. Increased permeability for Na+
3. Generation of action potential
4. Increased permeability for K+
5. Restoration of membrane potential
1 → 2 → 3 → 4 → 5
1 → 4 → 3 → 2 → 5
2 → 1 → 3 → 4 → 5
1 → 2 → 4 → 3 → 5
In the following diagram of action potential in a neuron, “x” depicts:
Depolarization
Repolarization
Polarization
Hyperpolarization
Each neuron is separated from the next by a small gap called:
Gap junction
Synaptic cleft
Synaptic gutter
Neural gap
Which of the following is incorrect about synaptic transmission?
Fusion of synaptic vesicles with pre-synaptic membrane
Release of neurotransmitter molecules into synaptic cleft
Binding of neurotransmitter molecules with receptor located on pre-synaptic membrane
Change in permeability of post-synaptic membrane for ions
Nervous system in humans is:
Dorsal and rigid
Dorsal, hollow and diffused
Ventral and primitive
Dorsal, hollow and central
Cerebral hemispheres communicate with each other through corpus callosum that is a band of:
Dendrites
Axons
Dendrons
Nerves
The primary function of spinal cord is to:
Produce CSF
Produce hormones
Communicate two hemispheres
Communicate brain with rest of body
These contain cell bodies of neurons:
Gray and white matter
Ganglia and gray matter
Nerve and ganglia
Nerve and white matter
Medulla oblongata is located:
In front of Cerebrum, below midbrain
In front of cerebellum, above pons
Between spinal cord and pons
In front of pons, above cerebellum
Sensory division of peripheral nervous system communicates between:
Receptors and CNS
Effectors and CNS
Receptors and effectors
CNS and muscles
All of the following body functions are controlled by ANS except:
Limb movement
Glandular secretions
Digestion in stomach
Blood pressure
Stimulation of vagus nerve will cause:
Increased blood pressure
Decreased heart rate
Increased blood flow to limbs
Dilation of pupil
Peripheral nervous system is further divided into:
Motor and sensory divisions
Sympathetic and parasympathetic systems
Autonomic and somatic divisions
Spinal cord and brain
Which one is used as messenger in both nervous and hormonal coordination?
Adrenaline
Oxytocin
Acetylcholine
Nicotine
A male body tends more towards the form of immature female after:
Spermiogenesis
Castration
Deficiency of dopamine
Hypergonadism
Which hormone increases calcium level in the blood?
Calcitonin
Parathormone
Cortisol
Thyroxin
Which of the following will prevent ovulation during pregnancy?
FSH
Estrogen
LH
Progesterone
Parkinson’s disease is believed to be caused by cell death in a brain area that produces:
Acetylcholine
Dopamine
Serotonin
Epinephrine
Doctor, during examining the epilepsy patients performs electroencephalography. During this process, membrane potential that spreads on/across _____________ is recorded.
Cristae
Cisternae
Neurolemma
Sarcolemma
Which of the following is false about hormones?
Transported through blood
Released by ductless gland
Responsible for long term regulatory changes
Initiate new biochemical reaction
Find out the mismatched pair from the given options:
Glucagon - Protein
ADH - Amino acid derivative
Oxytocin - Polypeptide
Cortisone - Steroid
SRF is produced by _______________ and acts on _______________.
Anterior pituitary, hypothalamus
Hypothalamus, anterior pituitary
Post pituitary, hypothalamus
Anterior pituitary, bone cells
ADH secretion is stimulated by decrease in blood pressure and blood volume which is detected by osmo-receptors in:
Kidneys
Cerebral cortex
Posterior pituitary
Hypothalamus
Gastrin is produce by mucosa of the pyloric region of stomach under the influence of:
Vitamin rich food
Lipid rich food
Protein rich food
Carbohydrate rich food
All of the following cause increase in secretion of MSH and darkening of skin except:
Excess light
Addison’s disease
Pregnancy
Cushing disease
Hormones that share a common hypothalamic releasing factor:
ACTH, FSH
FSH, LTH
ACTH, ICSH
FSH, LH
