Multiple Choice QuestionsA steroid hormone which regulates glucose metabolism is
cortisol
corticosterone
11-deoxycorticosterone
11-deoxycorticosterone
A.
cortisol
Cortisol or hydrocortisone is the principal glucocorticoid hormone (corticosterone is more abundant in some small mammals). It regulates the glucose metabolism and promotes gluconeogenesis, especially during starvation and raises blood pressure. Cortisone is an inactive form of cortisol.
The contractile protein of skeletal muscle involving ATPase activity is
tropomyosin
myosin
α-actinin
α-actinin
Which one of the following is not a second messenger in hormone action?
cGMP
Calcium
Sodium
Sodium
Areolar connective tissue joins
fat body with muscles
integument with muscles
bones with muscles
bones with muscles
Cri-du-chat syndrome in humans is caused by the
fertilization of an XX egg by a normal Y-bearing sperm
loss of half of the short arm of chromosome 5
loss of half of the long arm of chromosome 5
loss of half of the long arm of chromosome 5
Antibodies in our body are complex
lipoproteins
steroids
prostaglandins
prostaglandins
Earthworms are
ureotelic when plenty of water is available
ureotelic when plenty of water is available
uricotelic under conditions of water scarcity
uricotelic under conditions of water scarcity
Which of the following is an accumulation and release centre of neurohormones?
Posterior pituitary lobe
Intermediate lobe of the pituitary
Hypothalamus
Hypothalamus
Which one of the following statements is incorrect?
The residual air in lungs slightly decreases the efficiency of respiration in mammals
The presence of non-respiratory air sacs, increases the efficiency of respiration in birds
In insects, circulating body fluids serve to distribute oxygen to tissues
In insects, circulating body fluids serve to distribute oxygen to tissues
Which one of the following has an open circulatory system?
Pheretima
Periplaneta
Hirudinaria
Hirudinaria
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