12th Class Biology MCQS Coordination and Control

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Innate behaviour is a collection of responses that are predetermined by the
Legacy
Birthright
Heritage
Inheritance

Cytokinins delay the aging of fresh leaf crops such as cabbage and lettuce as well as keeping flowers
Attached
Open
Fresh
Delayed

Active membrane potential is
0.07 volts
– 50 mv
Both a & b
0.05 volts

Excess MSH is secreted in
Addison’s disease
Alzheimer’s disease
Parkinson’s disease
Grave’s disease

Myoglobin has a special function in muscle tissue:
None of these
It breaks down glycogen
It holds a reserve supply of oxygen in the muscle
It is a contractile protein

The sites where nerve impulse is transmitted from the nerve endings to the skeleton muscle cell membranes are the:
Z discs
Sarcomeres
Neucromuscular junctions
Myofilaments

The organic portion of bones matrix is important in providing all but:
Hardness
To resist stretch
Tensile strength
Flexibilty

The simplest form of learning is
Latent learning
Imprinting
Insight learning
Habituation

The concentrations of cell bodies of neuron are
Axons
Ganglia
Nodules
Dendrites

Each type of the principal type of sensation that we can experience e.g pain touch sight sound and so for this called a modality of
Regulation
Coordination
Susceptibility
Sensation

The funnction of the tubules in muscle contraction is to:
Make the action potential deep into the muscle cells:
Make and store glycogen
To hamper the nerve impulse
Release Ca+2 into the cell interior and then pick it up again

Which of the following statements conserning the role of Ca+2 inthe contraction of skeletal muscle is correct?
The tension of a skeletal muscle fiber is partly regulated by G proteins muscle
The mitochondria act as a store of Ca+2for the contractile process
Ca+2 entry across the plasma membrane is important in sustaining the contraction of skeletal muscle
A rise in inter cellular Ca+2 allows actin to interact with myosin

Antidiuretic hormone is also called
Oxytocin
Both a & b
ACTH
Vasopressin

Cortisol brings about an increase in blood glucose level mainly by its production from protein and by
Glucagons
Oestrogen
Insulin
Progesterone

The main transmitter for synapses that lie outside the central nervous system is
Serotonin
Dopamine
Acetylcholine
Adrenaline

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