NATIONAL OPEN UNIVERSITY OF NIGERIA

UNIVERSITY VILLAGE, PLOT 91, CASDASTRAL ZONE, NNAMDI AZIKIWE EXPRESS WAY, JABI, ABUJA.
FACULTY OF SCIENCES
MARCH/APRIL 2016 EXAMINATION

COURSE CODE:           BIO 306

COURSE TITLE:            GENERAL PHYSIOLOGY II

TIME ALLOWED:         2 Hours

INSTRUCTION: Answer question ONE (1) and any other THREE (3) questions

1a        Give a detailed description of how water and nutrients are transported in plants.             (5 marks)

  b.       Account for how terrestrial animals overcome the problems of water loss and water gains. (3 marks)

  c.       Enumerate the significance of the following?

(i) diffusion  (6 marks)

(ii) osmosis   (6 marks)

2.         With relevant examples describe the various ways reflex response is applied in our daily activities.

(15 marks)

3a.       What do you understand by the term osmoregulation?                                                        (2 marks)

 b.           Account for the need for osmoregulation in animals.

 c.            Describe the relationship between osmotic equilibrium and ionic composition of marine animals.

                                                                                                                                                            (8 marks)

4a.       Define excretory organ       (2 marks)

 b.        Outline the sequences of plasmolysis   (4 marks)

 c.        Write short notes on the following nitrogenous waste products:

1. ammonia            (3 marks)
2. urea                     (3 marks)
3. uric acid               (3 marks)

5.         In a tabular form, distinguish between hormonal and Nervous Control Properties.            (15 marks)