NEET Biology Locomotion and Movement MCQs Set 08

Answer: (b) Hyoid

Explanation:
1. The unpaired U-shaped bone upon which the tongue rests is known as hyoid bone.

Answer: (c) Femur

Explanation:
1. The longest bone of thigh is 'Femur'.

Answer: (a) a(iii), b(i), c(iv), d(ii)

Explanation:
1. Tarsal – 7, (talus, calcaneum navicular, cuboid, 3rd cuneiform, 2nd cuneiform 1st cuneiform) Phalanges – 14, (3 in each finger other than toe which has 2) Meta tarsal –5 Femur –1.

Answer: (c) Neuromuscular junction

Explanation:
1. In myasthenia gravis, neuromuscular junction is affected.
2. It is an autoimmune disease in which the antibodies attack and block the acetylcholine receptors at the post synaptic membrane inhibiting the excitatory effects of neurotransmitter.

Answer: (d) All of these

Explanation:
1. Z line A band I band H zone Sarcomere A band is present in the middle of the sarcomere.
2. H-zone is present in the middle of the A-band M-line is present in the middle of H-zone.

Answer: (c) For sustained work at a slow rate for a prolonged duration

Explanation:
1. White muscle fibres contract very fast and for a shorter duration.
2. So, it is helpful in : Movement of eye balls Fast and strenuous work for short duration Fast flights as in sparrow.
3. It is not found in the muscles required for contraction at a slow pace and for prolonged duration.

Answer: (d) Gastrocnemius and hamstrings

Explanation:
1. Adductor group of muscles – helps in bending of limbs towards mid-line of body.
2. Gluteus maximus – in upper thigh for movement.
3. Quadriceps femoris – biggest muscle; present in thigh for extension.

Answer: (c) More sarcoplasmic reticulum

Explanation:
1. In red muscle fibres, less sarcoplasmic reticulum is found but more mitochondria, blood capillaries and smaller diameter than white muscle fibres.

Answer: (b) Smooth muscle

Explanation:
1. Least blood supply is found in case of smooth muscle fibre while abundant in smooth muscle fibre as well as cardiac muscle fibre.

Answer: (b) Urinary bladder

Explanation:
1. In urinary bladder involuntary smooth muscle fibres are present.
2. Pharynx, oesophagus and tongue are under the voluntary control.

Answer: (b) TPC

Explanation:
1. The Ca2+ ions combines with troponin C of the troponin complex and changes the configuration of the complex resulting in the opening of the myosin bunding site of actin.
2. TpT 2+ Ca TpC TpI TpT TpC TpI.

Answer: (b) Mg++, Ca++

Explanation:
1. This option, Mg++, Ca++, is the correct choice, as it agrees with the standard NCERT account of this topic.

Answer: (a) –70 mV

Explanation:
1. The resting membrane potential is –70 mV. Which is due to negative charge inside and positive charge outside the neuronal membrane.

Answer: (c) Liver and muscles both

Explanation:
1. Cori's cycle involves liver and muscles both as organs which is mediated by blood.

Answer: (d) Occipital

Explanation:
1. Foramen magnum found in the occipital bone, is a passage through which medulla oblongata connects with the spinal cord.

Answer: (a) Amphiplatyan

Explanation:
1. Humans have amphiplatyan types of vertebrae.
2. Anterior ⎫ ⎬ Amphiplatyan ⎭ Posterior Procoelus Amphicoelus Heterocoelus Anterior Dorsal anterior Ventral Dorsal e.g., typical vertebra of th Posterior lizard, frog and snake e.g., fishes, 8 vertebrae of frog Ventral e.g., birds.

Answer: (d) Humerus

Explanation:
1. Deltoid ridge is found is humerus.
2. Head of humerus Greater tuberosity Lesser tuberosity (Articulates with glenoid cavity) Deltoid ridge (Deltoidius muscle attached) Median side Lateral side Trochlea Coronoid fossa Median condyle Lateral condyle.

Answer: (c) Humerus

Explanation:
1. Olecranon fossa is present in the humerus.
2. Olecranon fossa Posterior view of humerus.

Answer: (b) Ischium and pubis

Explanation:
1. Obturator foramen is found in the coxal bone, enclosed between ilium, ischium and pubis.
2. Ilium Acetabulum Ischium Obturator Foramen Pubis.