Question

1.What two types of motion/ movement do smooth muscles perform?

2.An embryo was exposed to a chemical early in its development. At birth, there is chromosomal damage to the circulatory system linked to the chemical exposure. What other organ systems should be examined for the same damage?

3.Small birds will often mob large predatory birds such as owls and hawks. This behavior involves the smaller birds gathering or flying near the larger bird, calling loudly, and even striking the larger bird, and may result in the larger bird leaving the area. This behavior is risky for the smaller birds but is commonly seen. From this description we can reasonably conclude that

1.birds are not intelligent enough to know that the larger bird is dangerous, 2.this behavior is clearly maladaptive and should be eliminated by natural selection, 3.there must be some advantage of this behavior, such as protecting their chicks, that makes the risks worthwhile, 4. These birds must have learned this behavior by operant conditioning 4.The function of honeybee drones is to bring nectar back to the hive. True or False? 5.Do fat cells function as an endocrine gland?

Answer 1

Answer 1. Smooth muscles are the involuntary muscles confined to our visceral organs and work involuntarily.

The peristalsis movement occuring in the oesophagus is an example of its movement along with opening and closing of the sphincter between the food pipe and the cardiac stomach.

Answer 2. Respiratory and the nervous system because these systems are prone to get attacked by chemicals.

Answer 3. These birds must have learned this behavior by operant conditioning.

Answer 4. False

Honey bee drone has got only one role and that is to fertilise the queen.

Answer 5. Fat cells or adipocytes function as endocrine glands by secreting the hormone, leptin.