Question

1. What is the internal layer of tissue in the heart?

a. endocardium

b. epicardium

2. Which vessels do not have the ability to constrict or dilate?

a. capillaries

b. arteries

c. arterioles

3. The smallest branch of the bronchial tree are:

a. bronchioles

b. primary bronchi

c. secondary bronchi

d. tertiary bronchi

Answer 1

Ans:- 1.

A,

Endocardium.

The internal layer of tissue in the heart is endocardium.

The wall of the heart consists of three layers:- epicardium ( external layer), myocardium ( middle layer), endocardium ( inner layer).

So the internal layer of tissue in the heart is endocardium.

2.

A,

Capillaries.

Capillaries do not have the ability to constrict or dilate .

Arteries and arterioles have the ability to constrict or dilate.

3.

A,

Bronchioles.

The smallest branch of the bronchial tree are bronchioles.

In bronchial tree the trachea is firstly divide into primary bronchi then primary bronchi divide into secondary bronchi then secondary bronchi divide into tertiary bronchi and then tertiary bronchi divide into bronchial that is the smallest branch of the bronchial tree.