NEET UG BIOLOGY Multiple Choice Questions (MCQs)
NEET UG Biology MCQs - Neural Control and Coordination & Chemical Coordination and Regulation
136. Which of the following is the basic functional unit of the nervous system?
Answer: B) Neuron
137. What is the primary function of the axon in a neuron?
Answer: B) To transmit nerve impulses away from the cell body
138. Which part of the nervous system controls voluntary activities and is responsible for higher functions like thinking and reasoning?
Answer: A) Central nervous system
139. The nervous system that regulates involuntary functions such as heartbeat and digestion is known as:
Answer: C) Autonomic nervous system
140. Which of the following is the first step in the generation of a nerve impulse?
Answer: C) Stimulus triggering sodium ion influx
141. Which of the following neurotransmitters is primarily involved in the transmission of nerve impulses across synapses?
Answer: D) All of the above
142. The pituitary gland is often referred to as the "master gland" because it:
Answer: A) Controls hormone production in other endocrine glands
143. Which hormone is produced by the thyroid gland and plays a key role in regulating metabolism?
Answer: B) Thyroxine
144. Which of the following hormones is secreted by the adrenal glands and helps the body respond to stress?
Answer: B) Adrenaline
145. Which of the following hormones is responsible for regulating the body’s blood sugar levels?
Answer: B) Insulin
146. The disorder characterized by insufficient secretion of thyroid hormones in children is known as:
Answer: B) Cretinism
147. Which of the following conditions is caused by an overproduction of growth hormone after the closure of the epiphyseal plates?
Answer: C) Acromegaly
148. Which of the following is caused by the overproduction of thyroid hormones and is characterized by weight loss, increased appetite, and exophthalmos?
Answer: C) Exophthalmic goiter
149. The condition in which the adrenal glands do not produce sufficient cortisol and aldosterone is known as:
Answer: C) Addison's disease
150. Which hormone is responsible for stimulating ovulation in females?
Answer: C) Luteinizing hormone
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