Answer the questions:-
1.) Mina's mother is baking a delicious cake. Mina's mouth is watering on seeing the cake. Why? Give a reason.
2.) Mr. Roy met with an accident which caused damage to his cerebrum. What would be its effect on him?
3.) Differentiate between sensory nerve and motor nerve.
Answers
Answer:
1) The phrase mouth-watering is actually pretty accurate. There are two types of saliva: mucous and serous. Mucous saliva is exactly what it sounds like—thick, sticky, and full of mucus. Serous saliva, on the other hand, is nearly all water, and that’s what floods into your mouth at the smell, sight, or thought of especially delicious food.
Making saliva is your body’s way of yelling excitedly about the food in front of you. WE ARE GOING TO EAT! says your brain. YES! WE ARE GOING TO EAT CAKE! agree your salivary glands, eagerly pumping spit into your mouth.
Explanation:
2)The brain has many different areas which are responsible for different tasks, which help humans perform different abilities. The damage would be to the parts that are responsible for these attributes:
(a) The cerebellum is situated at the back side of the skull
(b) Temporal lobe in cerebrum is under the lateral fissure
(c) Hypothalamus is located over the pituitary gland.
3) nerve contains bundles of nerve fibers, either axons or dendrites, surrounded by connective tissue. Sensory nerves contain only afferent fibers, long dendrites of sensory neurons. Motor nerves have only efferent fibers, long axons of motor neurons. Mixed nerves contain both types of fibers.