Question

5. Match the following parts of the brain to their functions: Hypothalamus a. controls basic life-support functions such as control of breathing Medulla oblongata b. maintains higher life-support functions such as body temperature regulation Temporal lobe c. serves as movement coordination center Occipital lobe d. initiates movement and thought Frontal lobe e. interprets hearing Cerebellum f. interprets vision 6. Describe the two branches of the autonomic nervous system. Summarize their differences and similarities.

Answer 1

Ans: II Please give raitings II

5. - Hypothalamus b. maintains higher life-support functions such as body temperature regulation.

- Medulla oblongata a. controls basic life-support functions such as control of breathing.

- Temporal lobe e. interprets hearing.

- Occipital lobe f. interprets vision.

- Frontal lobe d. initiates movement and thought.

- Cerebellum c. serves as movement co-ordination center.

6. The autonomic nervous system composed of 2 components;

-Sympathetic nervous system (SNS)

-Parasympathetic nervous system (PNS)

Simiarities between SNS and PNS;

• Both are the part of ANS.
• both are originated from spinal cord.
• both have an impotent in maintaing higher life-support.
• composed of post and pre-ganglionic neurons.

Difference between SNS and PNS;

Sympathetic	Parasympathetic
Involved in the fight or flight response.	Involved in maintaining homeostasis and rest and digest response.
prepares the body for any kind of a danger.	bring the body to a state of calm.
shorter neuron pathways, faster response time.	comparatively longer neuron pathways, slower response time.
Increases heartbeat, muscles tense up.	Reduces heartbeat, muscles relaxes.
The pupil dilates	The pupil contracts.
inhibit saliva secretion	Increases saliva secretion for digestion.

PARASYMPATHETIC NERVES "Rest and digest" SYMPATHETIC NERVES "Fight or flight" Dilate pupils Constrict pupils Stimulate saliva Inhibit salivation Slow heartbeat Cranial nerves Increase heartbeat Cervical nerves Constrict airways Relax airways Stimulate activity of stomach Inhibit activity of stomach Thoracic nerves Inhibit release of glucose; stimulate gallbladder Stimulate release of glucose; inhibit gallbladder Stimulate activity of intestines Inhibit activity of intestines Lumbar nerves Sacral nerves Secrete epinephrine and norepinephrine Relax bladder Contract bladder Promote erection of genitals Promote ejaculation and vaginal contraction Figure 45-20 Biological Science, 2le 2005 Pearson Prentice Hall,Inc.