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Biology Unit-8 Test

Total questions: 40

Worksheet time: 3600secs

Name
Class
Date
1.

What are three components of homeostatic regulation?

a)

Receptors, control center and effectors

b)

PNS, CNS and effectors

c)

Sensory, motor and associative neurons

d)

Cerebrum, cerebellum and pons

2.

In humans, nervous coordination is described by:

a)

Reception of stimulus by receptors

b)

Analysis of the stimulus by inter neurons

c)

Generation of response by effectors

d)

All A, B, C

3.

These are the structures which respond when they are stimulated by an impulse coming through motor neuron:

a)

Glands

b)

Thermo-receptors

c)

Sensory neurons

d)

Pacinian corpuscles

4.

In the skin, the receptors are concerned with the detection of at least:

a)

Three different senses

b)

Five different senses

c)

Four different senses

d)

Six different senses

5.

The chief structural and functional units of nervous system are:

a)

Neurons

b)

Microglia

c)

Neuroglia

d)

Schwann cells

6.

All of the following are important functions of neuroglia in CNS except:

a)

Protection of neurons

b)

Speed up impulse conduction

c)

Division of nerve cells

d)

Provide nutrition to neurons

7.

_______ of certain brain cells branch profusely, giving cell a tree-like appearance.

a)

Myelin sheath

b)

Axon

c)

Dendron  

d)

Dendrites

8.

The fiber of sensory neuron between dorsal root ganglion and peripheral receptors is:

a)

Axon

b)

Dendrites

c)

Dendron

d)

Cell body

9.

Cluster of ribosomes associated with RER and present inside the cell body of neurons is specifically called:

a)

Axolemma

b)

Neurofibrils

c)

Nissl’s granules

d)

Polysomes

10.

Identify the correct option with respect to the direction of conduction of nerve impulses by the following protoplasmic processes of neurons:

a)

A

b)

B

c)

C

d)

D

11.

While responding to stimulus, motor neurons give signals to:

a)

Receptors

b)

Effectors

c)

Afferent neurons

d)

Relay neurons

12.

In dorsal root ganglion, cell bodies of _________neurons are present.

a)

Sensory

b)

Intermediate

c)

Motor  

d)

Relay

13.

Identify the correct sequence of structures involved in a reflex circuit:

a)

Receptor Motor neuron Associative neuron Gland Sensory neuron

b)

Receptor → Motor neuron → Sensory neuron → Muscle → Associative neuron

c)

Receptor Sensory neuron Associative neuron Motor neuron Effectors

d)

Motor neuron → Associative neuron → Effectors → Sensory neuron → Muscle

14.

Resting membrane potential is actively maintained by protein pumps which utilize ATPs for:

a)

Na+ influx and K+ efflux

b)

Na+ efflux and K+ influx

c)

Na+ and K+ influx

d)

Na+ and K+ efflux

15.

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

a)

1 2 3 4 5

b)

1 → 4 → 3 → 2 → 5

c)

2 → 1 → 3 → 4 → 5 

d)

1 → 2 → 4 → 3 → 5

16.

In the following diagram of action potential in a neuron, “x” depicts:

a)

Depolarization

b)

Repolarization

c)

Polarization

d)

Hyperpolarization

17.

Each neuron is separated from the next by a small gap called:

a)

Gap junction  

b)

Synaptic cleft

c)

Synaptic gutter

d)

Neural gap

18.

Which of the following is incorrect about synaptic transmission?

a)

Fusion of synaptic vesicles with pre-synaptic membrane 

b)

Release of neurotransmitter molecules into synaptic cleft

c)

Binding of neurotransmitter molecules with receptor located on pre-synaptic membrane

d)

Change in permeability of post-synaptic membrane for ions

19.

Nervous system in humans is:

a)

Dorsal and rigid

b)

Dorsal, hollow and diffused

c)

Ventral and primitive

d)

Dorsal, hollow and central

20.

Cerebral hemispheres communicate with each other through corpus callosum that is a band of:

a)

Dendrites

b)

Axons

c)

Dendrons

d)

Nerves

21.

The primary function of spinal cord is to:

a)

Produce CSF

b)

Produce hormones

c)

Communicate two hemispheres 

d)

Communicate brain with rest of body

22.

These contain cell bodies of neurons:

a)

Gray and white matter

b)

Ganglia and gray matter

c)

Nerve and ganglia

d)

Nerve and white matter

23.

Medulla oblongata is located:

a)

In front of Cerebrum, below midbrain

b)

In front of cerebellum, above pons

c)

Between spinal cord and pons

d)

In front of pons, above cerebellum

24.

Sensory division of peripheral nervous system communicates between:

a)

Receptors and CNS

b)

Effectors and CNS

c)

Receptors and effectors

d)

CNS and muscles

25.

All of the following body functions are controlled by ANS except:

a)

Limb movement

b)

Glandular secretions

c)

Digestion in stomach

d)

Blood pressure

26.

Stimulation of vagus nerve will cause:

a)

Increased blood pressure

b)

Decreased heart rate

c)

Increased blood flow to limbs

d)

Dilation of pupil

27.

Peripheral nervous system is further divided into:

a)

Motor and sensory divisions

b)

Sympathetic and parasympathetic systems

c)

Autonomic and somatic divisions

d)

Spinal cord and brain

28.

Which one is used as messenger in both nervous and hormonal coordination?

a)

Adrenaline

b)

Oxytocin

c)

Acetylcholine

d)

Nicotine

29.

A male body tends more towards the form of immature female after:

a)

Spermiogenesis

b)

Castration

c)

Deficiency of dopamine

d)

Hypergonadism

30.

Which hormone increases calcium level in the blood?

a)

Calcitonin

b)

Parathormone

c)

Cortisol

d)

Thyroxin

31.

Which of the following will prevent ovulation during pregnancy?

a)

FSH

b)

Estrogen

c)

LH

d)

Progesterone

32.

Parkinson’s disease is believed to be caused by cell death in a brain area that produces:

a)

Acetylcholine

b)

Dopamine

c)

Serotonin

d)

Epinephrine

33.

Doctor, during examining the epilepsy patients performs electroencephalography. During this process, membrane potential that spreads on/across _____________ is recorded.

a)

Cristae

b)

Cisternae

c)

Neurolemma

d)

Sarcolemma

34.

Which of the following is false about hormones?

a)

Transported through blood

b)

Released by ductless gland

c)

Responsible for long term regulatory changes

d)

Initiate new biochemical reaction

35.

Find out the mismatched pair from the given options:

a)

Glucagon - Protein

b)

ADH - Amino acid derivative

c)

Oxytocin - Polypeptide

d)

Cortisone - Steroid

36.

SRF is produced by _______________ and acts on _______________.

a)

Anterior pituitary, hypothalamus

b)

Hypothalamus, anterior pituitary

c)

Post pituitary, hypothalamus

d)

Anterior pituitary, bone cells

37.

ADH secretion is stimulated by decrease in blood pressure and blood volume which is detected by osmo-receptors in:

a)

Kidneys

b)

Cerebral cortex

c)

Posterior pituitary

d)

Hypothalamus

38.

Gastrin is produce by mucosa of the pyloric region of stomach under the influence of:

a)

Vitamin rich food

b)

Lipid rich food

c)

Protein rich food

d)

Carbohydrate rich food

39.

All of the following cause increase in secretion of MSH and darkening of skin except:

a)

Excess light

b)

Addison’s disease

c)

Pregnancy

d)

Cushing disease

40.

Hormones that share a common hypothalamic releasing factor:

a)

ACTH, FSH

b)

FSH, LTH

c)

ACTH, ICSH

d)

FSH, LH