Multiple Choice QuestionsWhich of the following disorder is an outcome of irregularities in the metabolism of the nitrogenous waste?
Osteoporosis
Gouty Arthritis
Osteoarthritis
Rheumatoid arthritis
In the following diagram showing axon terminal and synapse A, B, C, D and E respectively represent
A-axon terminal, B-synaptic cleft, C-synaptic vesicles, D-neurotransmitters, E-receptors
A- axon terminal, B-synaptic vesicles, C-synaptic cleft, D-receptors, E-neurotransmitters
A-synaptic cleft, B-synaptic vesicles, C-axon terminal, D-neurotransmitters, E-receptors
A-synaptic vesicles, B-axon terminal, C-synaptic vesicles, D-neurotransmitters, E-receptors
Which of the following tissue is a vascular?
Cowpait bone
Skeletal muscle
Stratified squamous epithelium
Adipose tissue
The following is the diagram of TS of another. Identify the parts labelled as A, B and C.
A-Connective, B-Endothecium, C-Pollen grain
A-Endothecium, B-Connective, C-Pollen grain
A-Pollen grain, B-Connective, C-Endothecium
A-Endothecium, B-Pollen grain, C-Connective
Which one of the following is not correct pair of type of cancer and origin place?
Benign tumour – Non-cancerous tumour
Carcinomas – Cancer of epithelial tissues
Lymphomas – Haematopoietic cells tumour
Sarcomas – Cancer of glands (secretory tissues)
Epiphyseal plates at the extremities of long bones help in
Bone moulding
Elongation of bone
Bone formation
Formation of Haversian Canal
The functional unit of the contractile system in striated muscle is
Cross Bridge
Myofibril
Myofibril
Z-band
C.
Myofibril
A skeletal muscle consists of a bundle of long fibres running the length of the muscle. Each fibre is a single cell with many nuclei.
Skeletal muscle is also called striated muscle because of the regular arrangement of the and dark bands. Each repeating pattern of light and dark bands.
Each repeating unit is a sarcomere, the basic functional unit of the muscle. The borders of the sarcomere, the Z-lines are lined up in adjacent myofibrils and contribute to the striations visible with a light microscope. The thin filaments are attached to the Z-lines and project towards the centre of the sarcomere while the thick filaments are centred in the sarcomere. At rest, the thick and thin filaments do not overlap completely, and the area near the edge of the sarcomere where there are only thin filaments is called the I -band.
The A-band is the broad region that corresponds to the length of the thick filaments. The thin filaments do not extend completely across the sarcomere. So, the H-zone in the centre of the A-band contains only thick filaments. This arrangement of thick and thin filaments is the key to how the sarcomere and hence, the whole muscle contracts.
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