MCQOPTIONS
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MCQOPTIONS
This section includes 517 Mcqs, each offering curated multiple-choice questions to sharpen your Science knowledge and support exam preparation. Choose a topic below to get started.
| 251. |
Pathway of passage of impulse during a reflex action is called |
| A. | reflex path |
| B. | reflex way |
| C. | reflex arc |
| D. | reflex passage |
| Answer» D. reflex passage | |
| 252. |
Dorsally behind the optic lobes is |
| A. | midbrain |
| B. | cerebellum |
| C. | medulla oblongata |
| D. | hypothalamus |
| Answer» C. medulla oblongata | |
| 253. |
Blood donors must have a minimum hemoglobin per deciliters of |
| A. | 9.0 grams |
| B. | 10.0 grams |
| C. | 11.0 grams |
| D. | 12.0 grams |
| Answer» E. | |
| 254. |
Destruction of adrenal cortex occurs in |
| A. | adam's disease |
| B. | addison's disease |
| C. | cushing's disease |
| D. | arthritis |
| Answer» C. cushing's disease | |
| 255. |
Stored oxytocin and antidiuretic hormone in posterior lobe are released when they receive nerve impulses from |
| A. | thalamus |
| B. | cerebrum |
| C. | pons |
| D. | hypothalamus |
| Answer» E. | |
| 256. |
From the two vena cave, deoxygenated blood enters in the |
| A. | left atrium |
| B. | right atrium |
| C. | left ventricle |
| D. | right ventricle |
| Answer» C. left ventricle | |
| 257. |
Enzymes catalyze biochemical processes occurring in living cells, in |
| A. | strong heating |
| B. | room temperature |
| C. | freezing cold |
| D. | very narrow temperature range |
| Answer» E. | |
| 258. |
Blood is carried back to the heart through |
| A. | venues |
| B. | arterioles |
| C. | capillaries |
| D. | vein |
| Answer» E. | |
| 259. |
Gray matter is made up of |
| A. | myelinated nerve fibres |
| B. | non-myelinated nerve fibres |
| C. | axons and cell bodies |
| D. | cell bodies only |
| Answer» C. axons and cell bodies | |
| 260. |
Coagulation rate of blood is increased due to the production of |
| A. | elastin |
| B. | adrenaline |
| C. | myosin |
| D. | collagen |
| Answer» C. myosin | |
| 261. |
In cardiac system oxygenated blood |
| A. | leaves from left side of the heart |
| B. | leaves from the right side of the heart |
| C. | does not leave the lungs |
| D. | enters the lungs from the heart |
| Answer» B. leaves from the right side of the heart | |
| 262. |
Ovulation is suppressed by |
| A. | progesterone |
| B. | oxytocin |
| C. | oestrogen |
| D. | testosterone |
| Answer» B. oxytocin | |
| 263. |
The "lub" sound is produced after the |
| A. | ventricles are fully contracted |
| B. | ventricles start to relax |
| C. | bicuspid and tricuspid valves suddenly close |
| D. | semilunar valves are closed |
| Answer» D. semilunar valves are closed | |
| 264. |
Hydra is a small animal and it belongs to phylum |
| A. | porifera |
| B. | nematoda |
| C. | platyhelminthes |
| D. | cnidarian |
| Answer» E. | |
| 265. |
Transitions between sleep and wakefulness are influenced by |
| A. | certain neurons in medulla |
| B. | certain neurons in hippocampus |
| C. | certain neurons in thalamus |
| D. | certain neurons in pons |
| Answer» E. | |
| 266. |
Dendron is also called as |
| A. | nerve tissue |
| B. | nerve fiber |
| C. | nerve impulse |
| D. | neuron |
| Answer» C. nerve impulse | |
| 267. |
Cytoplasm present in axon is called |
| A. | neuroplasm |
| B. | protoplasm |
| C. | axoplasm |
| D. | dendroplasm |
| Answer» D. dendroplasm | |
| 268. |
In cardiac system what does systematic circulation refers to |
| A. | carry blood to the left side of the heart |
| B. | carry blood to the right side of the heart |
| C. | carry oxygenated blood from lungs to heart |
| D. | carry red oxygenated blood |
| Answer» C. carry oxygenated blood from lungs to heart | |
| 269. |
Under secretion of somatotrophin hormone causes |
| A. | yellowing of skin |
| B. | gigantism |
| C. | dwarfism |
| D. | arthritis |
| Answer» D. arthritis | |
| 270. |
Intermediate processes of a reflex arc consists of |
| A. | 4 |
| B. | 5 |
| C. | 6 |
| D. | 7 |
| Answer» C. 6 | |
| 271. |
Between liver and gut wall, the capillaries join to form |
| A. | hepatic vein |
| B. | hepatic portal vein |
| C. | iliac veins |
| D. | renal veins |
| Answer» C. iliac veins | |
| 272. |
Organs which detect any change and receive stimuli are |
| A. | effectors |
| B. | receptors |
| C. | nerve endings |
| D. | neurons |
| Answer» C. nerve endings | |
| 273. |
Blood in pulmonary arteries is at a lower pressure than blood in aorta allowing |
| A. | tricuspid valve to shut |
| B. | bicuspid valve to shut |
| C. | gaseous exchange to effectively take place in lungs |
| D. | semi lunar valves to prevent backflow of blood |
| Answer» D. semi lunar valves to prevent backflow of blood | |
| 274. |
Hormone is a Greek word meaning |
| A. | release |
| B. | dimnishing |
| C. | exciting |
| D. | eliminating |
| Answer» D. eliminating | |
| 275. |
Thorpe classified learning behaviour into |
| A. | two types |
| B. | four types |
| C. | five types |
| D. | six types |
| Answer» E. | |
| 276. |
Animals sometimes respond instinctively to specific and complex stimuli called |
| A. | special stimuli |
| B. | symbol stimuli |
| C. | sign stimuli |
| D. | free stimuli |
| Answer» D. free stimuli | |
| 277. |
Speed of impulse transmission in fiber is expedited through |
| A. | myelin sheath |
| B. | neurilemma |
| C. | node of Ranvier |
| D. | glomerulus |
| Answer» D. glomerulus | |
| 278. |
Nervous system of hydra is a network of neurons, present between the |
| A. | ectoderm and mesoderm |
| B. | ectoderm and endoderm |
| C. | endoderm and mesoderm |
| D. | mesoderm and pericarp |
| Answer» C. endoderm and mesoderm | |
| 279. |
Response in form of contraction is shown by |
| A. | bones |
| B. | glands |
| C. | bones and muscles |
| D. | Muscles |
| Answer» E. | |
| 280. |
Symptoms of cretinism include |
| A. | coarse scanty hair |
| B. | mental retardation |
| C. | yellowish scaly skin |
| D. | all of the above |
| Answer» E. | |
| 281. |
Life style of hydra is |
| A. | sedentary |
| B. | locomotary |
| C. | semi-sedentary |
| D. | both sedentary and locomotary |
| Answer» B. locomotary | |
| 282. |
In coordination system, Neurons |
| A. | make up the nervous tissue |
| B. | differ in size |
| C. | differ in shapes |
| D. | all of above |
| Answer» E. | |
| 283. |
At synapse axon endings of one neuron are connected to the |
| A. | axon of next neuron |
| B. | cell body of next neuron |
| C. | dendrites of next neuron |
| D. | dendron of next neuron |
| Answer» D. dendron of next neuron | |
| 284. |
Another name for vasopressin is |
| A. | oxytocin |
| B. | oestrogen |
| C. | anti- diuretic hormone |
| D. | cortisone |
| Answer» D. cortisone | |
| 285. |
Impulse carried by motor neurons is received by |
| A. | receptors |
| B. | central nervous system |
| C. | effectors |
| D. | brain only |
| Answer» D. brain only | |
| 286. |
Cytokinins delay aging of |
| A. | cabbage and lettuce |
| B. | pears |
| C. | tangerines |
| D. | pineapple |
| Answer» B. pears | |
| 287. |
Ventral root of spinal cord |
| A. | contains only receptor neurons |
| B. | contains only effector neurons |
| C. | ends in white matter |
| D. | are attached to the medulla oblongata |
| Answer» C. ends in white matter | |
| 288. |
Hindbrain is made up of |
| A. | cerebrum |
| B. | pituitary gland |
| C. | medulla Oblongata |
| D. | hypothalamus |
| Answer» D. hypothalamus | |
| 289. |
Nervous design in any animal is highly co-related with its |
| A. | behaviour pattern |
| B. | sleep cycle |
| C. | life style |
| D. | reproductive modes |
| Answer» D. reproductive modes | |
| 290. |
A single cubic centimeter of human brain may contain |
| A. | several hundred nerve cells |
| B. | several thousand nerve cells |
| C. | several billion nerve cells |
| D. | several million nerve cells |
| Answer» E. | |
| 291. |
Under-activity of parathormone causes a drop in blood calcium ions which in turn leads to |
| A. | stiffness of body |
| B. | arthritis |
| C. | muscle rupture |
| D. | muscular tetany |
| Answer» E. | |
| 292. |
Message is transmitted across synapse in form of chemical messengers called |
| A. | neurohormones |
| B. | neurotransmitters |
| C. | neuroreceptors |
| D. | neurosenders |
| Answer» C. neuroreceptors | |
| 293. |
During periods of rapid growth, sexual maturation and stress situations, high levels of |
| A. | oxytocin is produced |
| B. | thyroxine is produced |
| C. | testosterone is produced |
| D. | parathyroids is produced |
| Answer» C. testosterone is produced | |
| 294. |
Conditions of fear, anger and anxiety causes production of |
| A. | adrenaline |
| B. | thiamine |
| C. | thyroxin |
| D. | blood glycogen |
| Answer» B. thiamine | |
| 295. |
Excess thyroxine produces a condition called |
| A. | cretinism |
| B. | graves' disease |
| C. | gigantism |
| D. | progesterone |
| Answer» C. gigantism | |
| 296. |
Overactivity of parathormone would lead to a progressive |
| A. | muscular tetany |
| B. | demenralization of bones |
| C. | rickets |
| D. | arthritis |
| Answer» C. rickets | |
| 297. |
All are examples of cranial reflexes, but, not |
| A. | salivation |
| B. | scratching |
| C. | blushing |
| D. | sneezing |
| Answer» C. blushing | |
| 298. |
Examples of reflex action does not include |
| A. | sneezing |
| B. | blushing |
| C. | scratching |
| D. | vasoconstriction |
| Answer» E. | |
| 299. |
Behaviour is mainly divided into |
| A. | three types |
| B. | two types |
| C. | four types |
| D. | five types |
| Answer» C. four types | |
| 300. |
Smaller fibers which carry nerve impulse towards cell body are called |
| A. | roots |
| B. | Dendron |
| C. | dendrites |
| D. | strands |
| Answer» D. strands | |