A blood vessel stretch receptor helps regulate blood pressure. This receptor is called a:
Correct Answer: A. Baroreceptor
MCQ Collection
Pakistan MCQs
Practice Pakistan questions with answers and explanations.
A student compares smooth muscle with skeletal muscle. Smooth muscle is most likely to be found in:
Correct Answer: A. Walls of internal organs
A feather is damaged in a bird, but the bone remains intact. The affected system is mainly the:
Correct Answer: A. Integumentary system
A cockroach can move its legs quickly because the exoskeleton has:
Correct Answer: A. Joints and muscle attachment points
A fish kept in polluted water develops damaged scales and skin. The first affected function is likely:
Correct Answer: A. Barrier protection against environment
A migrating fish senses changes in water current and nearby movement without touching the object. This ability is mainly due to the:
Correct Answer: A. Lateral line system
An animal needs fast escape movement from a predator. Skeletal muscle is suitable because it is usually:
Correct Answer: A. Voluntary, striated, and capable of rapid contraction
A fish scale under a microscope shows protective layers. In fish, scales are important because they:
Correct Answer: A. Protect the body while allowing flexible swimming
A zoologist says movement requires integration of support, muscle, and control. The control component mainly comes from the:
Correct Answer: A. Nervous system
A student observes that muscles cannot push, they pull. Movement in opposite directions therefore requires:
Correct Answer: A. Pairs or groups of antagonistic muscles
A lateral-line neuromast is stimulated when water moves across hair cells. The stimulus being detected is:
Correct Answer: A. Mechanical displacement
A bivalve closes its shell tightly when disturbed. The structure most directly responsible is the:
Correct Answer: A. Adductor muscle