Select the correct statement with respect to locomotion in humans
A decreased level of progesterone causes osteoporosis in old people
Accumulation of uric acid crystals in joints causes their inflammation
The vertebral column has 10 thoracic vertebrae
The joint between adjacent vertebrae is a fibrous joint
The characteristics and an example of a synovial joint in humans is
Characteristics | Examples |
Fluid cartilage between two bones, limited movements | Knee joints |
Fluid filled between two joints, provides cushion | Skull bones |
Fluid filled synovial cavity between two bones | Joint between atlas and axis |
Lymph filled between two bones, limited movement | Gliding joint between carpals |
A diagram showing axon terminal and synapse is given. Identify correctly at least two of A-D
A - Receptor; C - Synaptic vesicles
B - Synaptic connection; D - K+
A - Neurotransmitter; B - Synaptic cleft
C - Neurotransmitter; D - Ca2+
Parts A, B, C and D of the human eyes are shown in the diagram. Select the option, which gives correct identification along with its functions/characteristics
A - retina - contains photoreceptors - rods and cones
B - blind spot - has only a few rods and cones
C - aqueous chamber - reflects the light, which does not pass through the lens
D - choroidits anterior part forms ciliary body
A.
A - retina - contains photoreceptors - rods and cones
A - Retina-contains photoreceptors - rods and cones. The daylight vision is function of cones and twilight vision is related to rods.
B - Blind spot-Photoreceptor cells are not present in this part.
C - Aqueous chamber contains a thin watery fluid called aqueous humour.
D - Sclera is the external layer of eye having dense connective tissue.
Which of the following statement is correct in relation to the endocrine system?
Adenohypophysis is under direct neural regulation of the hypothalamus
Organs in the body like gastrointestinal tract, heart, kidney and liver do not produce any hormones
Non- nutrient chemicals produced by the body in trace amount that act as intercellular messenger are known as hormones
Releasing and inhibitory hormones are produced by the pituitary gland
Select the answer which correctly matches the endocrine gland with the hormone it secretes and its function/deficiency symptom
Endocrine gland | Hormone | Function/ deficiency symptoms |
Anterior pituitary | Oxytocin | Stimulates uterus contraction during child birth |
Posterior pituitary | Growth Hormone (GH) | Oversecretion stimulates abnormal growth |
Thyroid gland | Thyroxine | Lack of iodine in diet results in goitre |
Corpus luteum | Testosterone | Stimulates spermatogenesis |
Which one of the following statement is correct?
Hard outer layer of pollen is called intine
Sporogenous tissue is haploid
Endothecium produces the microspores
Tapetum nourishes the developing pollen
Product of sexual reproduction generally generates
longer viability of seeds
prolonged dormancy
new genetic combination leading to variation
large biomass