CBSE Questions for Class 11 Medical Biology Neural Control And Coordination Quiz 12 - MCQExams.com

• The nervous system comprises two parts, namely the central nervous system (brain and spinal cord) and the peripheral nervous system (nerve networks).
• The peripheral nervous system is divided into two parts, the somatic nervous system, and the autonomic nervous system. 
• Sensory nerves transmit messages to and from the sense organs. 
• The autonomic nervous system controls involuntary actions such as heartbeat, respiration, digestion, and blood pressure.

• Conjunctiva is the mucous membrane that covers the eye on the front.
  
• Suspensory ligament emerges from the ciliary body and holds the lens.
  
• Macula lutea is the spot on the retina for perceiving light.
  
• So, the correct option is 'Basilar'.
  

• The anterior chamber of the eyeball is the part of the human eye with the chamber at right.
  
• The anterior chamber is the aqueous humor-filled space inside the eye between the iris and the cornea's innermost surface, the endothelium.

Correct Option: D

Explanation: 

• The factory of neurons is called a Cell body. 

• They are the soma of the neuron cell.

• It produces proteins.

• They produce proteins for axons, dendrites, and synaptic terminals.

Hence, The part of the neurons that perform basic cellular functions such as protein synthesis, etc is Soma.

The retina is a thin layer of tissue that lines the back of the eye on the inside. It is located near the optic nerve. The purpose of the retina is to receive light that the lens has focused, convert the light into neural signals, and send these signals on to the brain for visual recognition.

So, the correct option is 'retina'.

• The sclerotic layer is the outer layer of an eye that provides protection and shape to the eye. 
  
• The choroid layer is the layer next to the sclerotic layer and has blood vessels in it and helps in the functioning of an eye.
• The retina is the innermost layer of an eye and helps in the formation of image and acts as the sensory organ of an eye.
• The mucous membrane is the covering of the epithelial cells and helps in the protection of the eyes. They secrete mucus to maintain fluidity.

• The ceruminous glands are generally found in the skin of the human external auditory canal. 
• Those are modified apocrine glands, which, together with sebaceous glands, produce the cerumen, the ear wax. 
• Cerumen plays a significant role in the protection of the ear canal against physical damage and microbial invasion.
• Thus, the correct answer is 'Ear'.

• Cell bodies of preganglionic neurons of parasympathetic division are located in the brain and in the sacral region of the spinal cord. 
  
  
• So, the parasympathetic division is called as craniosacral division.
   
  Hence, Option C is correct.

• The inner ear structure called the cochlea is a snail-shell-like structure divided into three fluid-filled parts. 
• Two are canals for the transmission of pressure and the third is the sensitive organ of Corti, which detects pressure impulses and responds with electrical impulses, which travel along the auditory nerve to the brain.

• The sympathetic nervous system is involved in preparing the body for stress-related activities; the parasympathetic nervous system is associated with returning the body to routine, day-to-day open.
• The sympathetic nervous system decreases saliva secretion while it is stimulated by the parasympathetic nervous system. 
  
• A normal pupillary constriction is a balance between the sympathetic and parasympathetic nervous systems. Parasympathetic innervation leads to the constriction of the pupil of the eye. Sympathetic stimulation of the adrenergic receptors causes the contraction of the radial muscle and subsequent dilation of the pupil. 
• Parasympathetic neural signals decrease the heartbeat and speed of generation of action potential and thereby the cardiac output. Sympathetic neural signals increase the heartbeat rate and the strength of ventricular contraction and thus, increases the cardiac output.
• The sympathetic nervous system slows down the peristalsis movement while the parasympathetic stimulates the movement.
• Thus, the correct answer is option B.