A steroid hormone which regulates glucose metabolism is

• cortisol

• corticosterone

• 11-deoxycorticosterone

• 11-deoxycorticosterone

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

26.

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