Homework-Lecture 1

•structures that reach the bottom of the epidermis and do not penetrate it

Hair
Fatty layer
Sensory endings
Duct of the sweat gland

•Which of the following statements is considered the most accurate about the two layers of skin epidermis ?

The surface layer of skin epidermis affects the inner layer.
The inner layer of skin epidermis affects the surface layer.
Each layer affects the other.
There is no relation between the two layers.

Which of the following represents the response of blood vessels that are located near the skin surface and sweat glands, when the temperature is higher than usual ?

A
B
C
D

•From the functions of skin epidermis is

The decrease of human body temperature.
The extraction of nitrogenous wastes from the blood.
The production of sweat.
The preventing of bacterial invasion to the body.

•Which of the following structures extend through the epidermal and dermal layers of the skin

Hair and blood vessels.
Hair and sweat glands.
Sweat glands and tactile corpuscles.
Sebaceous glands and blood vessels.

•The main function of sweating in human is getting rid of

The excess body temperature.
The excess salts in the body.
The excess water in the body.
The nitrogenous wastes in the body.

Which of the following organs has a role in excretion process ?

A
B
C
D

•The opposite figure illustrates three excretory organs in the human body, if you know that organ no. (1) has a role in the digestion process, and organ no. (3) is the largest organ in the body, so that :

•The excretory products (X) and (Y) represent …………., respectively.

water and mineral salts
mineral salts and water
poisonous substances and nitrogenous wastes
nitrogenous wastes and poisonous substances

•All the following are from the excretory products, except

CO2
Nitrogen
Water
urea

•Which of the following foodstuff produces the uric acid through the degeneration of its digestion products ?

Bean
Rice
Butter.
Honey

Which of the following graphs illustrates the relationship between the change in
the rate of sweat secretion (Y) and the atmospheric temperature (X) in case of not doing any physical activity

A
B
C
D

•which part of the digestive system has an important role in the process of excretion…………..

Spleen
Liver
Kidney
all of the following

•The opposite figure represents one of the protozoans (Amoeba), which of the following biological processes does this figure represent ?

Gas exchange.
Nutrition.
Transport
Excretion

•From the wastes that are produced from the degeneration of carbohydrates after their digestion are

O2 and CO2
Water and O2
Water and CO2
Nitrogen and CO2

•Which of the following is considered from the harmful metabolic products that resulted from the degeneration of proteins ?

Uric acid
Ammonia
urea
All of the above

•The opposite figure illustrates three excretory organs in the human body, if you know that organ no. (1) has a role in the digestion process, and organ no. (3) is the largest organ in the body, so that :

•Organ no. (2) represents